Module 7
Maintenance
Practices
Safety Precautions Aircraft and Workshop 1. A CO2 extinguisher is used on
solid, liquid, hot metal and electrical fires
solid, liquid and electrical fires
solid and liquid fires
2. Fire on landing gear brake should be extinguished with carbon dioxide extinguisher
water extinguisher dry powder extinguisher
3. Acetylene gas forms an explosive compound with tin and silver
tin and copper copper and silver
4. Neither oil nor grease should be used as a lubricant on couplings or pipelines carrying Oxygen
Nitrogen Kerosene
5. The colour of CO2 type fire extinguisher is red
green black
6. Risk assessments should only be carried out on all tasks and processes that are performed tasks using hazardous chemicals
tasks carried out above the height of 6 foot
7. Which type of extinguisher can be used for engine fire? Water
BCF CO2
8. In an oxygen system, if the pressure drops to 500 PSI, it
Hot metal fires would be extinguished with foam
Before 1997 CO2 was colour coded black. Now the cylinders are red with black top. It is unlikely (but possible) that the question has been updated.
causes anoxia begins to overheat
blocks the oxygen system regulator
9. You are involved with a fire caused by titanium swarf. What type of extinguishant should you use to deal with the fire?
CO2
Dry asbestos wool and chalk powder Chemical foam
10. What is the colour of a powder extinguisher? Red
Blue Green
11. If an oxygen cylinder pressure falls below 500 PSI the diluter stick will stick
the oxygen will degrade and cause anoxia condensation will cause corrosion
12. Which type of fire extinguishers can be used in the cabin? C.T.C.
water or B.C.F. M.B.
13. After working with epoxy resins, how is natural oil returned to the skin? Acetone/lanolin mixture
Epoxy removing cream Refatting cream
14. The minimum 'no smoking' zone around an aircraft when refuelling is 15m
10m 6m
15. Once a person has been disconnected from the source of an electrical shock the next step should be
check for pulse and start cardiac massage if necessary
At low pressure, air can mix with the oxygen. The moisture in the air freezes as the gas expands on exit of the system and blocks the regulator
Acetone is used to remove epoxy resin, but it dries the skin, so it is mixed with lanolin to prevent this (same mixture as nail varnish remover).
seek assistance immediately
check for breathing and start AR if necessary 16. What can cause dermatitis?
Not wearing eye protection when using solvents Washing hands in solvents
Inhalation of paint fumes
17. If there is an electrical fire, what are the safe procedures? Fight the fire
Call fire service and fight the fire (if possible) Evacuate
18. When mixing acid and water
it does not matter which way the two are mixed the acid should always be added to the water the water should always be added to the acid 19. An aircraft should not be refueled when
the APU is running
within 10 metres (30 feet) of radar operating within 30 metres (100 feet) of radar operating 20. What is the colour of a BCF fire extinguisher?
Green Blue Red
21. The most appropriate fire extinguisher for an aircraft wheel and brake fire would be water
carbon dioxide dry powder
22. Which type of extinguisher can be used for an electric fire? Foam
CO2 Water
23. A dry powder extinguisher is coloured green
blue red
Workshop Practices 1. One quart is how much in millilitres?
946 ml 952 ml 1000 ml
2. On a hollow tube where would a small indentation normally be unacceptable? In the mid 1/3 section
Nowhere on the tube is an indentation acceptable In either of the outer 1/3 portion of the tube
3. What type of grinding wheel would you sharpen an HSS drill bit on? A fine wheel
A coarse wheel A green wheel 4. When using a reamer
use no lubricant
use the same lubricant as was used on the drill bit use lard oil
5. How many teeth per inch are used on a hacksaw blade for cutting hard metal? 36
26 54
6. How many strokes per minute are used on a hacksaw when cutting thick metal? 60
50 30
A Green Grit (Silicon Carbide) wheel is used for Tungsten Carbide bit tools (Non-steel). For HSS you need a fine Grey Aluminium Oxide wheel.
7. When lifting a bulky component with a wire rope sling, the component can be protected from damage by the sling by
using a suitably shaped sling using spreader bars and packing fabricating alternative lifting points
8. Gas bottles for CO2, air and acetylene are coloured green, grey, maroon
grey, maroon, green black, grey, maroon
9. To drill a 1/4 inch hole in titanium, the correct starting procedure would be to centre drill
to centre punch
to drill 1/4 inch hole direct
10. In a torque wrench of handle length, L = 12 in. and an extension E = 3 in, the desired torque value is 300 lbs.in. the dial should read
240 lb.ins. 280 lb.ins. 375 lb.ins.
11. When a torque loading is specified for a castellated or slotted nut on an undrilled new bolt the torque should be applied and the bolt suitably drilled for the split pin
the bolt should be pre-drilled and the torque increased if necessary to allow the split pin to be fitted
the bolt should be pre-drilled, the torque applied and the nut eased back, if necessary, to allow the split pin to be fitted
12. A reamer with spiral flutes is removed clockwise
straight anticlockwise
13. The difference between high and low limits of a size for a dimension is known as the deviation
fit
tolerance
14. Rubber components should be stored in a well lit room
in warm and humid conditions in a cool dark area
15. When comparing the machining techniques for stainless steel sheet material to those for aluminium alloy sheet, it is normally considered good practice to drill the stainless steel at a
higher speed with less pressure applied to the drill lower speed with more pressure applied to the drill lower speed with less pressure applied to the drill
16. When drilling stainless steel, the drill used should have an included angle of 90° and turn at a low speed
118° and turn at a high speed 140° and turn at a low speed
17. When stop drilling a crack, what is the typical drill size used? 0.025 inch
0.250 inch 0.125 inch
18. When degreasing aluminium alloys, and no trichloroethylene is available, a suitable alternative is
M.E.K.
dilute sulphuric acid white spirit and naphtha
19. A grinding wheel is normally refaced by
holding a hard wood scraper against the rotating wheel dressing with a special tool
grinding through using another grinding wheel
20. When checking a torque wrench 15 inches long, the load required to give torque of 120 lbs.in. is
6 lbs 8 lbs
10 lbs
21. How would you check the setting of an adjustable reamer? External calipers
Ring gauge
Dial test indicator and 'V' blocks
22. What is the specified lubricant for drilling brass? None
Paraffin Lard oil
23. In the Limit System, the term 'allowance' is the hole diameter variation
shaft diameter variation
difference between shaft and hole diameters 24. Which is correct concerning the use of a file?
The terms `double-cut` and `second-cut` have the same meaning in reference to files A smoother finish can be obtained by using a double-cut file than by using a single-cut file Apply pressure on the forward stroke, only, except when filing very soft metals such as lead or aluminium
25. Which procedure is correct when using a reamer to finish a drilled hole to the correct size? Turn the reamer in the cutting direction when enlarging the hole and in the opposite direction to remove from the hole
Apply considerable pressure on the reamer when starting the cut and reduce the pressure when finishing the cut
Turn the reamer only in the cutting direction
26. Of what tolerance is the following an example? 1 in. + 0.002 - 0.001 Bilateral
Multilateral Unilateral
27. How should a scraper be finally sharpened? By draw filing
On a grindstone
28. How is a D.T.I. initially set up?
The needle zeroed, then the plunger fully extended
The gauge plunger should be partly depressed and the needle zeroed The gauge plunger should be fully extended and the needle zeroed 29. Nickel alloy chisels should be sharpened
on a grindstone on an oilstone by filing
30. What type of lubricant should be used when drilling aluminium? Paraffin
None Vegetable oil
31. How are spring dividers sharpened? By filing the outside of the points By grinding the inside of the points By stoning the outside of the points
32. What would be the result of an insufficient clearance angle on a twist drill? It would tend to pull through the hole
It would produce an oversize hole It would cut slowly, if at all
33. A tolerance given on a dimension is indicated by the prefix TOL with the permitted tolerance
by a plus and minus sign preceding the permitted tolerance by enclosing the permitted tolerance within a triangle 34. How much material should be allowed for reaming?
0.001 in. 0.003 in. 0.010 in.
35. After cutting a 3/8 inch BSF internal thread and stud, it is found that the stud is too large. How is a fit achieved?
Remove the male thread crests with a fine emery cloth Grind a taper on the end of the bolt
Re-adjust the die and re-cut the male thread
36. You have reamed out a hole in a piece of titanium. How should you remove the reamer safely to prevent unnecessary damage?
Remove it, but in the same rotation as if cutting Allow the reamer to pass right through the hole Anti-clockwise
37. Why are some components torque loaded?
To ensure that their elastic limit is not exceeded To ensure that they are tightened to their yield point To ensure they do not vibrate loose
38. When using a reamer, in which direction should it be turned? Clockwise when cutting and anti-clockwise when removing Anti-clockwise when Cutting and removing
Clockwise when cutting and removing 39. Draw filing produces
a fine finish a coarse finish a mottled finish 40. A safe edge of a file is used
against a finished surface
against a rough unfinished surface
to give a fine polished finish to a smooth surface
41. What is the minimum number of hacksaw blade teeth that should be in contact with the material being cut?
4 3 2
42. When reading a blueprint, a dimension is given as 4.387 inches + 0.005 - 0.002. Which statement is true?
The minimum acceptable size is 4.385 inches The maximum acceptable size is 4.385 inches The maximum acceptable size is 4.389 inches 43. Chalk when used with a fine file produces
a finer finish
a milled type surface a ground type surface
44. When using a hand file correctly, the downward pressure should be used only on the forward and return stroke
on the forward stroke on a return stroke
45. The size of the nibs of vernier calipers can be ascertained by using the standard of 0.693 inches
noting the dimension engraved on the instrument measuring the steel rule
46. A shaft dimension given as 1.225 inches +/- 0.003 inches followed by 'MMC' should be manufactured to what size?
1.225 inches 1.228 inches 1.222 inches 47. 2 microns is 0.002 inch 0.000 002 inch 0.002 mm
48. The edge or surface of a part from which dimensions are measured from is called the water line
reference plane datum
the clamps must be no more than 1 metre apart
avoid distortion to the co-axial cable to maintain the dielectric constant
distortion of the outer sheath is allowed providing the inner cable is not affected
50. If a test or inspection instrument has no calibration data supplied by the manufacturer, you would use the calibration data provided by
the British Standards Quality Assurance documentation referring to calibration of instrumentation and test equipment
CAAIPs
the Maintenance Manual
51. Why are test or inspection instruments regularly calibrated and certified? To ensure they are being used regularly
To ensure they will perform within the required limits of operation To ensure they can handle the range of measurements required of them
52. Who is responsible for ensuring that weight and balance instrumentation is serviceable before use?
The manufacturer of the equipment
The person responsible for carrying out the weight and balance procedure An engineer holding a license in the instrument category
53. At which frequency is the calibration of frequently used crimping tools carried out? Annually
Every 1000 crimps Bi-annually
54. When using the trepanning tool, the hole to be drilled should be 1/32 inch larger than the guide pin
same diameter as the guide pin 1/32 inch smaller than the guide pin
55. When using a strip-board, the tracks on a PCB are etched after fitment and soldering of components
before component fitment
after fitment but before soldering the components
0.005 inch 0.0025 inch 0.0006 inch
57. The intervals for calibration of test equipment are as specified in EASA Part-145
are every year
are different from one appliance to another 58. What drill angle is used to drill titanium?
105-120 degrees 90-100 degrees 130-140 degrees
59. When tightening a nut on a bolt the torque loading applied is independent of whether the threads are wet or dry
the tangential application of the force times the perpendicular distance from the point of application to the centre of the bolt
inversely proportional to the force applied to the spanner 60. The UK standard of limits and fits is
BS308 BS4500 BS8888
61. When using a Pacific tensiometer the correct tension is found by
reading dial, provided the correct riser is used for the cable diameter comparing reading to chart provided
adding reading to riser number
62. What temperature should the heat gun be set for shrinking heat shrink sleeve? At the rated temperature
100°C above rated temperature 100°C below rated temperature
63. Calibration of aircraft hydrostatic weighing equipment is not required
Rated temperature is the normal working temperature of the heat-shrink material. The shrink at approximately 100°C above that
done once a year
carried out every time before an aircraft is weighed and adjusted by operator 64. When drilling light alloy
no lubricant is required use the specified lubricant lard oil should be used
65. The picture shows a torque wrench with an extension. To apply a torque of 350 lb.in. the reading on the dial should be
245 lb.in. 350 lb.in. 280 lb.in.
66. Reaming light alloy tube is done with hard base lubricant
the same oil and lubrication as used for cutting no lubricant
67. Tolerance is the
allowable error due to faulty workmanship and tools difference between worn and new tools
the difference between a hole and shaft size
68. What should be done if a tool is found not to be working to its calibrated requirements? It should be removed from service, marked as unserviceable and sent away for overhaul A mechanic should adjust it to restore it to the correct operation
It should be placed back into stores and kept in service until the next calibration is due 69. When carrying out soldering to an end termination and a wire, you should tin
both the end of the wire and the termination only the end of the wire
70. Run-out of a rod is measured using DTI, surface plate and V-blocks vernier and V-blocks
micrometer and V-blocks
71. How would you mark a defect on an exhaust system? Chalk
Pencil
Special zinc/copper tipped marking tool
72. Which of the following is the most appropriate filing technique? Even pressure forward and backwards
Pressure backwards, relieve pressure forwards Pressure forwards, relieve pressure backwards 73. Stubborn pins in file teeth should be removed by
using file card
pricking out with sharp point tapping file gently on workbench
74. When using low tungsten hacksaw blades it is recommended to use 60 strokes per minute
50 stroke per minute 40 strokes per minute 75. Units of torque are
lbs.ft and lbs.in Lbs and Kg lbs/ft2 and lbs/in2
76. The calibration of a piece of test equipment is suspect. Your actions would be remove from service and annotate accordingly
note and rectify later calibrate/rectify immediately
77. What should you check before using a set of V blocks? It doesn't matter
That both blocks have the same identification stamps The calibration date
Tools
1. A drill and wire size gauge has how many pre drilled holes? 1 - 50
10 - 60 10 - 50
2. How many strokes per minute should generally be used with a hacksaw? 55
30 60
3. What type of drill would you use on carbon fibre? Tungsten carbide
Diamond tipped Carborundum 4. A micro-shaver is used to
mill the rivet head after forming cut rivets to length prior to forming trim the shank diameter prior to forming
5. How many teeth per inch are there on a fine hacksaw blade? 64
32 16
6. What is the normal cutting angle of a drill? 12°
130° 59°
bushes shunt coil
8. When using the old style vernier caliper for taking internal measurements add the nib measurements
subtract the nib measurements
the nib size has no relevance and can be ignored
9. To carry out an insulation test on a wire rated at 115 volts you would use a 500 volt megger
a 250 volt megger a 115 volt megger 10. The normal drill angles are
cutting angle 12°, web angle 130° and clearance angle 130° cutting angle 130°, web angle 59° and clearance angle 12° cutting angle 59°, web angle 130° and clearance angle 12° 11. The abbreviation 'A/F' means
Associated Fine American Fine Across Flats
12. A rivet shaver is used to mill the tail after setting mill the tail after cutting mill the head flush
13. A drill and wire gauge has holes numbered 1 to 80
10 to 60 1 to 50
14. A 250 volt megger should not be used on electronic equipment
in fuel tanks
on radio aerials
15. If the leads of a megger are held apart
the spring will return the needle to infinity the spring will return the needle to the zero stop if the handle was turned the meter would read infinity 16. One megohm is equal to
1,000 ohms 100,000 ohms 1,000,000 ohms 17. Reamers are used to
drill accurate holes to make holes oversize
enlarge holes to accurate dimensions 18. The pitch of a hacksaw blade is
the number of teeth on the blade its length
the number of teeth per inch 19. The web angle of a normal twist drill is
130° 5° 12°
20. The leads of a bonding tester
have critical lengths and the resistance of the leads is accounted for
are interchangeable, one 60 foot long having two prongs and a 6 foot one with a single prong
are supplied in 60 foot and 6 foot lengths but can be varied due to wear 21. Expanding reamers are used to
ream tapered holes
ream holes of different diameters by adjusting the position of the blades ream holes in metal that has been heated
22. The main scale on a 24/25 vernier caliper is divided into inches, tenths and twentieths
inches, tenths and thousandths inches, tenths and fortieths
23. The vernier height gauge uses the same principle as the vernier caliper
micrometer bevel protractor
24. One revolution of the thimble of the English micrometer produces a linear movement of the spindle of
0.001 inch 0.040 inch 0.025 inch
25. The pitch of a metric micrometer screw thread is 0.02 mm
1.0 mm 0.5 mm
26. When torque loading, a wrench should be selected where the required value falls in the middle of the range
at the top end of the range at the bottom end of the range
27. The test equipment normally used to carry out a continuity test on an electrical cable is an ammeter
a high tension circuit tester a low reading ohmmeter
28. If all three prongs on a bonding tester were shorted together, the metre would read zero
FSD
off-scale high
0.025 inches 0.050 inches 0.0001 inches
30. The vernier scale on an English 49/50 caliper is divided into 50 equal divisions
49 equal divisions 40 equal divisions
31. The thimble of a metric micrometer is divided into 40 equal divisions
25 equal divisions 50 equal divisions
32. The measuring capacity of a Vernier Caliper is the length of the graduated scale
the length of the graduated scale less the length of the vernier scale the length of the graduated scale plus the width of the nibs
33. Vee-blocks are manufactured
in sets of three and identified for use as a set
as single items and may be paired with any other vee-block in sets of two and identified for use as a set
34. The metric micrometer reading shown is
13.37 mm 13.87 mm 10.337 mm
its low torque allows single handed use it is available both pneumatic and electric
it can cut thicker metal than is required by most repair schemes 36. The gears used in a pistol windy are
gears in a gearbox gyrator type gears spur gears
37. What type of gear is used in a pneumatic gun drill? vane type gears used for toughness
spur gears helical gears 38. Cross cut files
cut in both directions
cut on the forward stroke only cut on the backward stroke only
39. The correct size spanner for use on a unified 5/16 in. threaded hexagon headed bolt is 5/16 in A/F
1/4 in A/F 1/2 in A/F
40. The length of the Vernier Scale in a 24/25 Vernier Caliper is 0.6 in
1.2 in 2.45 in
41. What is used to measure the depth of a blend after a corrosion repair? Dial Test Indicator
Straight edge and slip gauges Vernier caliper
42. Vacu-blast beads re-used on an aluminium-alloy component, after being used on an steel component will
cause clogging of the vacu-blast machine cause corrosion to the component
43. The main scale on a 49/50 Vernier caliper is divided into inches, tenths and fortieths
inches, tenths and twentieths inches, tenths and thousandths 44. Centre punches are made of
high carbon steel with the tip hardened and tempered case hardened mild steel
high carbon steel hardened and tempered
45. What type of flutes should be used in a reamer for cutting titanium? Tapered flutes
Straight flutes Spiral flutes
46. The depth micrometer reading shown is
0.336 ins. 0.361 ins. 0.261 ins.
47. What should be the included angle of a twist drill for soft metals? 90 degrees
118 degrees 65 degrees
48. What should the point angle of a drill be if it is to be used for drilling titanium (drill size below 1/4 inch diameter)?
90° to 105° 105° to 120° 90°
49. How are pin punches classified?
By type and diameter of the small end By overall length and type
By length and diameter of the small end 50. How are spring dividers classified?
The diameter of a circle scribed with the legs at 600 The diameter of the largest circle that can be scribed The length of the legs
51. The purpose of a taper tap is to produce a fine thread form a tapered thread start a thread
52. Why is the Vee cut in the base of a scribing block?
to allow the scribing block to be used on the edge of the marking off table to trap any dirt that may be adhering to the surface of the marking off table to reduce the contact area with the marking off table and reduce friction 53. An inside micrometers normal measurement range is
½in. to 10in 2in. to 10in 2in. to 12in
54. What is the purpose of Target Points on a Vernier caliper? To enable spring dividers to be accurately set
For scribing lines inside tubes To zero the caliper
55. Die Nuts are used to form external threads clean up damaged threads
form internal threads
56. A Dial Test Indicator may be used for checking dimensions to within 0.125'' checking a round bar for bow
checking any known depth
57. Which cut of a file should be used on mild steel? Second cut
Single cut Double cut
58. Which of the following statements is correct?
To cut an aluminium block use a fine hacksaw blade To cut thin mild steel plate use a coarse blade To cut thin sheet metal use a fine blade
59. A power meter indicates that a circuit has a power of 4 kW. Separate readings of the voltage and current are 400 V and 20 A respectively. The Power factor is
20 ½ 2
60. What is a key-seat rule used for?
Marking lines which are parallel to a true edge Providing a positive driving force
Marking lines parallel to an axis of a round bar
61. When measuring current in a circuit, the ammeter is placed in series with the shunt
in series with the circuit in parallel with the circuit
62. A 3½ bit multimeter will indicate readings up-to 9999
1999 999 ½
Material removal is greater with Double Cut, and should NOT be used with soft metals
63. The resolution a bevel protractor can be read to is 50'
5' 1º
64. If an English micrometer is showing 4 main divisions, 3 sub-divisions and the 25th thimble division was in line, what would the reading be?
0.475 in. 0.175 in. 0.555 in.
65. An open circuit on an ohmmeter would be indicated by a reading of zero resistance
a negative resistance infinite resistance
66. The leads of an ohmmeter should be replaced if their resistance is greater than 1 ohm
0.05 ohms 0.5 ohms
67. Torque loading is determined by multiplying the tangent force applied at the free end of the spanner
by the distance moved by the point of application by its distance of application from the axis of the bolt
by the dia. of the bolt and the distance of its point of application 68. Which electrical measuring device needs a power source?
An ammeter A voltmeter An ohmmeter
69. When measuring voltage or current with a digital multimeter, the indication is RMS values
peak values Average values
Black Green Red
71. The Vernier scale of a Bevel Protractor is shown below. What is the reading?
63º 15' 86º 15' 38º 45'
72. Three point micrometers are for measuring external dimensions
linear dimensions internal dimensions
73. When is a coarse hacksaw blade used? When cutting ferrous metals only
When cutting material of thick cross section When cutting material of thin cross section
74. A voltage drop across a component is measured by placing the meter in series with the power source
parallel with the component series with the component
Spiral fluted reamer Expanding reamer Parallel reamer
76. What is the purpose of a Morse taper on large sizes of twist drills? To give a positive drive when fitted into a tapered chuck To ensure that the drill is fitted correctly
To allow the drills to be fitted to a drilling machine
77. What should be the included angle of a twist drill for hard metal? 90 degrees
118 degrees 100 degrees
78. The threads per inch on the spindle of an English micrometer are 40 t.p.i.
50 t.p.i. 25 t.p.i
79. The spring loaded ratchet attached to the spindle of a standard external micrometer produces a pre-set feel during use
a smooth free run during use
a means for controlling thread binding 80. The purpose of the land on a twist drill is to
to allow clearance for swarf
present the cutting edge at the required angle reduce friction
81. The name given to the moving scale on the Vernier caliper is the main scale
the vernier scale the curso
1.8016 1.816 0.1816
83. What does the cut of a file refer to? Grade
Number of teeth per inch Arrangement of the teeth
84. Why are teeth of hacksaw blades off-set?
To provide clearance for non-cutting part of the blade To allow a quick cutting positive action
To provide greater strength 85. How are files classified?
By length, grade and material By length, grade, cut and section
By length, grade, cut, section and material 86. Hammers are classified by
shape of head and length of shaft weight and type of head
weight and length of shaft
87. What does the term 'second cut' indicate as applied to hand files? The section of the file
The grade of the file A reconditioned file
A taper, second and plug tap A taper and plug tap
A taper and second tap 89. The teeth on a hacksaw blade
should point away from the handle should point towards the handle does not matter which way they point
90. What is the clearance angle on a normal twist drill? 12 degrees
130 degrees 59 degrees
91. When tapping blind holes a set of three taps is used a single tap is used a set of two taps is used
92. On a torque wrench the torque loading is
the tangential application of the force plus the perpendicular distance to the centre of the bolt
the tangential application of the force times the perpendicular distance to the centre of the bolt
the tangential application of the force divided by the perpendicular distance to the centre of the bolt
93. Surface Plates are used only on surface tables for filing flat surfaces
for marking out work and testing flat surfaces
94. The main scale of a Metric Vernier Caliper is calibrated in millimetres
micro-meters
95. For a drill to cut properly it is essential that the point angle be the same on each side, for general use the angle is
130° 12° 59°
96. When using a bench grinding machine the wheel rotates from the top down towards the work piece
from the bottom upwards past the work piece either direction as selected on starting the machine 97. The thimble of an English micrometer is divided into
40 equal divisions 50 equal divisions 25 equal divisions
98. The reading on the inch micrometer scale shown is
0.483 ins 4.758 ins 0.488 ins
99. The pitch of the screw thread on an English micrometer is 0.050 in
0.001 in 0.025 in
100. An avometer can measure alternating current because it has a bridge rectifier circuit
moving iron moving coil
the diameter of the small end a type number (1 to 10) the diameter of the large end
102. A crimped electrical connection is suspected to be high resistance. How would you verify this without disconnecting the circuit?
Measure the millivolt drop across the connection with a millivolt meter Measure the resistance with an ohmmeter
Measure the resistance with a 250 volt megger 103. How would you measure continuity of a coaxial cable?
With a safety ohmmeter With a reflectometer With a 250 volt megger
104. On a long coaxial cable how would you check for discontinuities and shorts in situ? Safety ohmmeter
Time Domain Reflectometer Continuity tester
105. If the leads of a bonding tester are damaged, what is the procedure?
The damaged leads and the tester should be returned to the manufacturer for repair and calibration
Provided that the damage is situated close to the end of the leads the cable may be shortened
A new lead may be manufactured using the correct current rated cable
106. When carrying out a continuity test on a circuit when a known resistance exists, what instrument would you use?
A multimeter
A high resistance insulation tester A lamp and battery
107. Taper pins are classified by length and taper
length and diameter of small end length and diameter of large end
108. Live AC circuits are to be checked for open circuits by the use of multimeter set to AC volts
ammeter set to amps ohmmeter set to megohms
109. A multiplier resistance is used to extend the working range of the voltmeter
ammeter ohmmeter
110. On twist drill chart, small drills have their sizes in fractions, in inches largest numbers
smallest numbers 111. The Sine Bar is used to
produce angles using slip gauges check accuracy of slip gauges by itself to calculate angles
112. On a vernier micrometer, what will three turns of the barrel represent? 0.075 inch
0.100 inch 0.050 inch
113. How does a windy drill get its power? Spur gears
Bevel gears Impeller
114. How are taper reamers classified? Length and diameter of large end Taper and diameter of small end
Length, diameter of large end, and diameter of small end 115. An AC voltmeter reads
peak value average value
116. A hydrometer is used to
check battery electrolyte density check battery electrolyte specific gravity take humidity reading
117. A pyrometer is a
thermometer for use at high temperature foam/granule fire extinguisher
pyramid shaped altimeter 118. A hygrometer is used to
check battery electrolyte relative density check battery electrolyte specific gravity take humidity reading
119. A 0.625 inch diameter drill is identified by Letter E
5/8 Letter A
120. To measure AC with a moving coil, it is rectified and measures average value is rectified and measures peak value can be directly connected
121. What is a countersink tool used for? To adjust the depth of a countersink
To prevent damage to pipework in a blind hole To adjust the angle of a countersink
122. PIDG crimp tools are marked by
coloured handles and wire crimp size on tool wire crimp size on tool only
123. When measuring a square waveform with a multimeter, what voltage does it display? Equal to RMS value
More than RMS value Less than RMS value
124. If an ammeter reads 0 - 1mA FSD, what would you be required to do to enable it to read 10mA FSD?
Place a 9.9 ohm resistor across the coils Place a 9 ohm resistor in series with the meter
Place a 5.8 ohm resistor as a shunt in parallel with the meter 125. The internal resistance of a voltmeter is
high low
no more than 0.05 ohms
126. The internal resistance of an ammeter is high
1 ohm low
127. A drill bit of 0.250 inch would be 7/32 and letter G
8/32 and letter E 6/32 and letter F
128. Needle grease points are used on large pivoted joints
items with gland seals small pivoted joints
129. A flat chisel being used for aluminium should have a point angle of 55 degrees
30 degrees 65 degrees
general purpose
corners less than 60 degrees saw sharpening
131. A rawhide mallet is
available with copper inserts less expensive than bossing mallet
used for giving softer blows than boxwood mallet 132. Tension files
can be used to cut in one direction only clog easily
can cut in either direction 133. The scale on an ohmmeter is
cramped at high resistance cramped at low resistance linear across the range
134. Three revolutions of a 40 T.P.l. micrometer will show 0.03 inch
0.003 inch 0.075 inch
135. To carry out a continuity test you would use an HT circuit tester
a low reading ohmmeter ammeter
136. What is the resolution of a standard DTI? 0.020 mm
0.010 mm 0.050 mm
137. In a moving coil meter the deflecting force is provided by a current carrying coil pivoted in a permanent magnet field a soft iron permanent magnet
hairsprings which move the pointer towards full scale
138. The force acting on a meter which returns the pointer to zero is called the turning force
controlling force deflecting force
139. The forces acting on a meter which moves the pointer over the scale is called the deflecting force
the controlling force the turning force
140. The resistance of an ammeter must be low to prevent volts drop across it
low because the ammeter is in parallel with the circuit high to create a large volts drop across it
141. The resistance of a voltmeter must be low to prevent overloading the circuit high so that little current passes through it
low to provide a parallel path for the circuit current 142. When operating a grease gun, you
clean grease fitting with clean dry cloth beforehand apply a pressure of 50 - 80 psi.
verify grease fitting can accept grease by hand feel 143. What is the lip clearance of a normal twist drill?
125-135 degrees 135-145 degrees 105-115 degrees
144. What is the included angle of a drill to be used on soft metals? 40 degrees
90 degrees 118 degrees
All metals Soft metals Hardened metals
Avionic General Test Equipment
1. When an anodised surface coating is damaged in service, it can be partially restored by a chemical surface treatment
a suitable mild cleaner
applying a thin coat of zinc chromate primer 2. During an insulation test
recorded with aircraft power supplied to the circuit being tested depend on the ambient conditions during the test
always be infinity if the wires have been installed correctly
3. When carrying out a serviceability check on a bonding tester - short together the three prongs of both probes and ensure which of the following?
The meter reads 0.1 ohm A zero reading
A full scale reading is obtained 4. The damping force in a meter
assists the pointer to move over the scale prevents oscillation of the pointer
returns the pointer to zero
5. When turning the handle on a megger with the probes kept apart the needle moves to zero
the needle stays at infinity the needle deflects to infinity
6. How do you prime a dead weight tester?
wind handle fully out and pour fluid in the reservoir wind handle fully in and pour fluid in the reservoir Remove the weights and pour fluid into the hole
7. When using a digital meter to test a diode, a correct operation of the diode is indicated by a volt drop of
0.3V to 0.7V 1.5V to 2V 2.5V to 2.8V
8. Continuity of a fibreoptic cable is tested with a light source and optometer
calibrated light generator and opto-power meter multimeter
9. What is the problem with using a megger on a piece of equipment containing capacitors Feedback from the capacitors will blow the megger up
Impedance in the capacitors will give a false high reading Fluctuating readings will occur while the capacitors charge up
10. If an insulation resistance tester is operated and the leads are suspended in free air, what will the meter read?
Zero Infinity
Mid scale - it is a ratiometer movement and there is no current flowing in the external circuit 11. What is the primary purpose of bonding aircraft components?
To prevent lightning strike damage To provide a circuit return path
To ensure all components are of the same electrical potential
12. If the two prongs of a bonding tester are shorted and the single prong lead is in free space, what will be the reading on the scale?
1 ohm Zero Full scale
13. A fuel quantity test set has an externally adjustable capacitor
resistor inductor
14. When connecting or disconnecting an electrical appliance the wall socket switch must be off
the wall socket switch can be on the appliance must be off
15. When testing an anodised component with an insulation tester take the anodised coating into account when reading results the anodised coating is too thin to make any difference ensure probes penetrate the anodised layer
16. When using a bonding tester
ensure prongs do not penetrate anodising layer an anodised component cannot be tested ensure prongs penetrate anodised layer
17. When testing a circuit with suppressors, with a megger, you should disconnect the suppressors because
condensers will cause inaccurate readings because of the chokes charging/discharging of capacitors causes fluctuating readings they will cause the megger to burn-out
18. The maximum value of bonding of a secondary structure is 1 megohm
1 ohm 1 kilohm
19. Primary structure bonding should be no more than 1.0 ohm
50 milliohms 0.5 ohms
20. On a Bonding Tester the number of probes on the 60 ft and 6ft leads respectively are 1 and 2
2 and 1 2 and 2
continuity, bonding, functional, insulation bonding, continuity, insulation, functional functional, bonding, continuity, insulation 22. On a static leak tester, pressure is released by
slowly opening the release knob for 3 minutes an internal balance valve in the tester
a bleed valve in the tester
23. When testing thermocouples using a test set the ambient temperature is considered every time
is only considered when temperatures of 20°C or above never needs to be considered
24. A pressure gauge is fitted to a Dead Weight Tester. The piston area is 0.25 sq.in. and the total mass of the mass carrier and masses is 5lb. If the pressure gauge is accurate what pressure in pounds per square inch (PSI) will it read?
20psi 200psi 1.25psi
25. When insulation testing a circuit with suppressors, what should you do? Disconnect the suppressors as they will obscure the readings
Bridge the suppressor terminals as you may damage them Nothing, the suppressors will not affect the results
26. Bonding lead testers are attached with either of the leads can be connected anywhere
a 60 feet lead is connected to the main earth and a 6 foot test lead is connected to check the resistance between selected points
a 6 feet test lead is connected to the main earth and a 60 feet lead is connected to check the resistance between selected points
27. Before using a bonding tester, the 6 foot lead has the two prongs shorted together with a piece of metal. What would the indicator read?
Zero at the centre Full scale right Full scale left
28. The maximum resistance between isolated conducting parts which may be subject to appreciable electrostatic charging and the main earth system should be
1 ohm 0.5 ohm
0.5 megohms or 100,000 ohms per square meter or foot
Engineering Drawings, Diagrams and Standards 1. What is third angle projection?
each view represents the side of the object furthest from the adjacent view each view represents the side of the object nearest to it in the adjacent view each view is at an angle of 30 degrees to the plane of projection
2. Sketches are usually made easier by the use of plain white paper
graph paper artist’s paper
3. What type of diagram shows the wire size required for a particular installation a block diagram
a wiring diagram a schematic diagram
4. For sketching purposes, almost all objects are composed of one or some combination of six basic shapes; these include the
triangle, cylinder, cube, sphere, cone and circle triangle, plane, circle, line, square and sphere angle, arc, line, plane, square and circle 5. This drawing indicates
a blind tapped hole a countersunk hole a counterbored hole
6. The width of a visible outline on a drawing is 0.5 mm
0.3 mm 0.7 mm
7. What does GA stand for on a drawing? Gradient Axis
General assembly General arrangement
8. Design drawings of aircraft components are produced by organizations approved by CAA in accordance with the BCARs
British Standards Institute SBAC
9. This symbol found on an engineering drawing would mean
concentricity angularity cylindricity
10. Which pictorial projection shows one face in true elevation and line of depth normally draw at 30° or 45° to the horizontal?
Perspective Isometric Oblique
11. If a design amendment is made on a drawing
the old issue number is retained, with the amendment date added no change in issue number or date is necessary
a new issue number and date must be allocated to the drawing 12. The British Standard for Engineering Drawings is
BS 308 BS 307 BS 8888
13. P.C.D. is an abbreviation for Precision Circle Dimension Pitch Cord Diameter Pitch Circle Diameter 14. This represents relief valve squared shaft bearing on shaft 15. This represents an external thread an internal thread a counterbored hole 16. Drawing numbers are
unique to each drawing
changed after each drawing amended after May 28, 1999 the same as serial numbers
17. Hatching lines are usually drawn at: 45°
30° 60°
18. The scale of an engineering drawing is shown as 1:4. This indicates it is drawn four times larger
drawn to scale
19. An orthographic projection usually shows a pictorial view of the object
one, three-dimensional view of an object three, two-dimensional views of an object
20. When dimensioning a drawing, the dimension lines should be only size dimensions
the minimum number of dimensions necessary to enable the component to be manufactured
as many dimensions as possible
21. 'PFD' on an engineering drawing would indicate repair and recondition
dye penetrant check ultra-sonic test
22. S.W.G. is an abbreviation for Standard Water Gauge Screw Width Gauge Standard Wire Gauge
23. If you are unable to identify a structure 'classification' as either primary or secondary, what action should you adopt?
Upgrade it to 'primary' Grade it as 'secondary'
Paint it red and stamp it as 'tertiary'
24. What colour is used to indicate a tertiary structure on a diagram or drawing? Green
Yellow Red
25. Which parts of the aircraft are classified secondary structures?
Highly stressed parts but if damaged will not cause failure of the aircraft
Lightly stressed parts such as fairings, wheel shields and minor component brackets etc Highly stressed parts and if damaged may cause failure of the aircraft and loss of life
26. This symbol found on an engineering drawing would mean
concentricity angularity cylindricity 27. This symbol means
first angle projection second angle projection third angle projection 28. The abbreviation B.A. means
British Arrangement British Assembly British Association 29. This tolerance symbol means
angularity diameter position
30. Where are correct layout, dimensioning, numbering and reference procedures for engineering drawing are to be found?
BS 1916 BS 308 BS 8888
31. 10:1 on an engineering drawing indicates the drawing is full size
the drawing is ten times full size the drawing is one tenth full size
32. When reading an engineering drawing, this symbol means
profile of a surface profile of a position profile of a line
33. Lines known as short dashes (thin) are used on drawings to indicate hidden detail
cutting revolved visible outlines 34. This symbol means
flatness
perpendicularity position
35. Any change to a drawing
must be accompanied by the new issue number and date requires a new drawing number
must be notified to the S.B.A.C. 36. This symbol on a drawing means
washed and packed
solution treated and requiring precipitation solution treated and precipitated
concentricity dimensionality diameter 38. Break lines are used
in sectional drawing
where it would be inconvenient (because of limited space) to draw long lengths of the same section
to show where components are expected to break 39. An oblique projection
has one view looking directly at one face with the lines representing depth drawn at 90° is the same as an isometric projection
has one view looking directly at one face with the lines representing depth drawn at a constant angle
40. A drawing in which the subassemblies or parts are shown as brought together on the aircraft is called
a detail drawing an installation drawing a sectional drawing
41. A thread on a drawing is labeled ½ - 20 UNF - 1B. The thread is internal
either external or internal, depending on the application external
42. NTS on a drawing stands for Not To Scale
No Tolerance System Not True Scale
43. A hydraulic system schematic drawing would indicate the direction of fluid flow through the system
specific location of the individual components within the aircraft 44. Which statement is true regarding an orthographic projection?
It could have as many as eight views
One-view, two-view, and three-view drawings are the most common There are always at least two views
45. A line used to show an edge which is not visible is a phantom line
hidden line break line
46. One purpose for schematic diagrams is to show the size and shape of components within a system physical location of components within a system functional location of components within a system 47. This type of break line represents
round bar square tube round tube
48. What type of line is normally used in a mechanical drawing or blueprint to represent an edge or object not visible to the viewer?
Alternate short and long light dashes Light solid line
Medium-weight dashed line
49. A specific measured distance from the datum or some other point identified by the manufacturer, to a point in or on the aircraft is called a
specification number zone number
station number
double pole - single throw switch double pole - double throw switch single pole - double throw switch 51. This electrical symbol represents a
iron core inductor variable inductor air core inductor
52. This electrical symbol represents a
Zener diode NPN transistor PNP transistor
53. In a first angle orthographic projection the plan view is placed above the front elevation
below the front elevation below the side elevation
54. When a cutting plane on a drawing cuts a web longitudinally, the web is sectioned with different direction of hatch
not sectioned
sectioned the same as the rest of the view 55. This electrical symbol represents a
push-pull circuit breaker push to reset circuit breaker toggle switch circuit breaker 56. This electrical symbol represents a
fuse light bulb flexible coupling 57. Water Lines are
front to rear measurements on the fuselage left and right measurements on the fuselage vertical measurements on the fuselage
58. When a cutting plane goes through a bush and bolt assembly, on the sectioned view both the bush and the bolt will be hatched
the bush will be hatched but the bolt will not neither the bush nor the bolt will be hatched 59. This symbol indicates that
machining is required on a particular surface chisels must not be used
machining is required on all surfaces 60. This is a diagram of
a voltage divider a potentiometer a voltage regulator
61. Which of the following lines indicate hidden detail on a drawing?
A broken line as shown in 3 A continuous line as shown in 1 A broken line as shown in 2
62. The letter A.F.D. in a circle stamped on a material indicates that it has an across flats diameter bolt
been annealed fired and doped been anodic flaw detected
63. Where would Zone 324 be found in ATA 100?
Between rear spar of wing and trailing edge of wing Tip of horizontal stabilizer
Fwd of the wing rear spar 64. This is a diagram of a
variable resistor rheostat
potentiometer
amendment number date
issue number
66. A geometric tolerance symbol indicating that one edge must be parallel to a datum edge would be shown in which of the following conventions?
Convention A Convention B Convention C
Fits and Clearances 1. A press fit requires
some sort of driving force the shaft to be shrunk by cooling the hole to be expanded by heat
2. Which of the following shafts would you use to obtain a clearance fit in a bush 0.750 inch diameter?
0.752 inch 0.748 inch 750 inch
3. After mechanical removal of corrosion on an aluminium alloy casting, the length of the blended recess should be
no more than twenty times the depth no less than ten times the depth no less than twenty times the depth
4. Which of the following is checked when using a 'GO / NO -GO' gauge? Allowance
Clearance
5. If there is a positive allowance between the smallest possible hole and the largest possible shaft, the fit is known as
a clearance fit an interference fit a transition fit 6. A tolerance is
a permitted variation on a dimension to allow for inaccuracy of equipment a permitted difference between new and worn dimensions
a required difference in dimension between mating parts to obtain a certain class of fit 7. The length of a blended repair of corrosion should be no less than
10 times its depth 5 times its depth 20 times its depth
8. A transition fit is one in which the shaft is smaller than the hole
larger than the hole the same size as the hole
9. The equipment required to carry out a run-out check on a shaft would be a surface plate and a three leg trammel
a DTI and 'V' blocks
a ball bearing and a micrometer
10. Which of the following is a 'Bilateral Tolerance'? 2 inches + 0.002
2 inches - 0.002 2 inches ± 0.002
11. What is the maximum bow allowed in a strut? 1 in 500
1 in 600 1 in 200
12. Tolerances are classified in two ways, these are Upper and lower
Dimensional and isometric Dimensional and geometric
13. What is the typical acceptable limit of a dent on a frame member? Twice the skin gauge and 0.75 inch diameter
One gauge depth and 0.75 inch diameter One and a half times the skin thickness
14. A light drive clearance between 3/4 inch diameter bolt and hole, on a drawing would be shown as
0.005 inches 0.0015 inches 0.0025 inches
15. The maximum permissible bow in a steel tube is 1:400
1:200 1:600
Electrical Cables and Connectors 1. Radio interference between co-axial cables can be reduced by
connecting the earths of the cables together at a common bonding point provide shielding to the earthing connectors
connecting the earths of the cables to separate bonding points 2. When a co-axial cable is placed in a wire bundle, the loom
should have the co-axial cable on the outside for ease of inspection carefully tied with lacing tape so as not to deform the dielectric. should be tied together tightly using plastic ties (tie-wraps) 3. In a front release connector the pin will be
released from rear and extracted from the front released from the front and extracted from the front released from the front and extracted from the rear
4. A diode is commonly used to protect a relay from spikes in the supply. Which of the following would be suitable for this?
a Gunn diode a Schottky diode a Zener diode
5. When you change an EGT gauge, you should
do test letting new gauge 'soak' for 30 minutes then do test taking ambient temperature into consideration
do a test immediately, taking ambient temperature into consideration
do a test without considering ambient temperature, as it is already accounted for by the instrument
6. The maximum number of wire splice repairs in a single cable is four
three five
7. The crimping tool handle ratchet ensures
the jaws fully bottom before handles can be opened the correct crimping tool force is used
the jaws fully open before crimping can take place
8. A new contactor has been crimped onto a high amperage wire that you suspect has a high resistance.
Use a millivoltmeter across after contacts are closed and it is under steady load Use a millivoltmeter across it before contacts are closed
Use a millivoltmeter across it as the contacts are closed
9. An in-line crimp is suspected of having high resistance. How do you check it? Use a safety ohmmeter
Use a millivoltmeter with current flowing in the circuit Do a continuity check
10. When checking the earth terminal with a millivolt drop test, typically it is 5 millivolts per 10 amps of current. What is the resistance value?
5 milliohm 50 milliohm
0.5 milliohm
11. When inserting connector pins, they should be
inserted first by hand, then fully inserted by the contact inserter tool inserted by hand
fully inserted by the contact inserter tool
12. During an insulation test, the minimum resistance in high temperature areas is 10 megohm
0.5 megohm 2 megohm
13. When testing co-axial cable in-situ, to find the location of short circuits, use a continuity tester
time delay reflectometer multimeter
14. When testing a 'live' AC circuit, use a shunt AC multimeter
galvanometer
multimeter set to AC volts
15. A wire clamped vertically at one end and horizontally at the other end should have a bend radius of no less than
3 times the diameter of the wire 5 times the diameter of the wire 10 times the diameter of the wire
16. Glycol deicer fluid in contact with a silver cable can cause corrosion
disintegration of the cable insulation a fire
17. With a rear release connector, the pin will be
released from the rear and extracted from the front released from the front and extracted from the rear released from the rear and extracted from the rear
18. The maximum operating temperature for a nickel plated copper or aluminium connector is 260°C
135°C 200°C
19. What gauge of pin would a yellow plastic insert/extract tool be used on? 16 - 14
22 - 18 12 - 10
20. Can the insulation grip be adjusted on a PIDG crimp tool? No
Yes by adjusting the pins Yes by turning a knob
21. What gauge of pin would a red plastic insert/extract tool be used on? 22 - 18
16 - 14 12 - 10
22. What cable would you use where temperatures are going to exceed 200°C? Tinned copper or aluminium
Silver plated copper or aluminium Nickel plated copper or aluminium
23. How long should a fireproof cable last in a fire? 15 minutes
5 minutes 50 minutes
24. What gauge of pin would a blue plastic insert / extract tool be used on? 16 - 14
22 - 18 12 - 10
25. The insulation resistance for wiring in undercarriage wheel-wells should normally be not less than
10 megohms 2 megohms 5 megohms
26. What causes knuckling on older type electrical cables? Excessive pull through forces
Applying cable ties too tightly Over-temperature soldering
27. To find a high resistance or open circuit, carry out a bonding check
a continuity check a milli-volt drop test
28. The maximum bonding resistance on an aircraft primary structure should be 0.001 ohms
0.01 ohms 0.05 ohms
29. Before effecting a crimp, the bare ends of a cable should be straightened out
tightly twisted
twisted lightly in the direction of the lay
30. The number of the dots impressed on the insulation of the pre-insulated connectors during crimping indicates that
the crimp is properly formed
the correct connector has been used
the correct tool was used to effect the connection
31. The pressure of the insulation crimp jaws on the PIDG crimping tool can be changed by varying the torque applied to the handles
changing the position of the pins
using different coloured crimping pliers and terminations 32. When referring to fuses, HRC means
hot running capacity high running current
33. When wiring an electrical component to a plug, the live wire is coloured blue
brown
green and yellow
34. A hole is placed in the lowest point of electrical cable conduit to allow for drainage of moisture
to allow for pull-through of the cables
to secure the conduit to a piece of aircraft structure 35. The minimum distance between electrical cable splices is
12 inches 500 mm 3 feet
36. A fire resistant cable is proof tested by exposure to a standard fire for 5 minutes
15 minutes 30 minutes
37. When fitting coaxial cable connectors it is important to not damage any seals fitted
fit the correct lock nuts
make sure the outer cup is fitted the correct way round
38. When inserting pins into a front release connector the inserting tool should be used with the gap facing which direction?
Either direction
The centre of the connector The outside of the connector
39. When using a hydraulic crimping tool, after completing the crimping operation, the crimp is formed when
the foot pedal force is at maximum
the bypass valve closes and the ram returns to neutral
40. The type of binding tape used for cables in temperatures above 260°C is which of the following?
Teflon Nylon Nomex
41. The type of binding tape used for cables in temperatures which may reach 360°C is which of the following?
Teflon Nomex Nylon
42. What is the minimum bend radius of a loom adequately supported at a terminal block? 3 x diameter
10 x diameter 8 x diameter
43. How are front release pins removed?
The tool is inserted from the front and the pin is removed from the rear The tool is inserted from the rear and the pin Is removed from the front The tool is inserted from the front and the pin is removed from the front
44. If a co-axial cable clamp is over tightened so as to compress the dielectric, how will the capacitance change?
Stay the same Decrease Increase
45. What is the minimum bend radius of a single co-axial cable? 8 x diameter
6 x diameter 10 x diameter
46. What is wet arc tracking?
A fault caused by insulation damage A fault caused by 'knuckling through'
A fault caused by hot stamp printing
47. When using a heat shrink gun, what should the temperature of the gun be set to? 100° below the heat shrink temperature
15° below the heat shrink temperature 100° above the heat shrink temperature
48. In an electrical cable 1EF6B22NMS, what does the letter E represent? Cable size
Circuit function Segment letter
49. On a coaxial cable, cable impedance is not effected by length
inversely proportional to length proportional to length
50. A secondary earth is 22 AWG
not less than 0.5mm cross sectional area 18 AWG
51. 'E' on a wire, under ATA 100 is a system ID code
phase indication cable size
52. To prevent wet arc tracking cable grips should be tight cables should not be stretched
ensure hot stamp printing is controlled
53. When splicing a cable with a soldered joint, the operation is finished when the solder sleeve disappears
the solder and insulation have formed the solder has melted
filled with connectors covered with blanks
filled with connectors and blanked
55. Co-axial cable is preferred to airframe cable in which application? Where the diameter of cable is not important
Low frequency interference High frequency interference
56. Forward release electrical connectors are removed by the wire being twisted to the right
pulled backwards pushed forwards
57. When crimping wires, the wires should be straight
twisted lightly twisted
58. Why are copper wires used in electrical systems? They have a low resistance to current
They do not give off a magnetic field They have high permeability
59. When crimping wires, the wire should be beneath the crimp
be flush with the crimp
extend 0.8 mm beyond the crimp 60. 1EF6B22 NMSV, What does the B mean?
Segment letter Circuit function Cable number
61. A white/blue insertion-extraction tool would be used on a cable of what size? 22
