No. 1 What is the fastening device shown at the left side of the
drawing ?
> A A beam clamp.
B An angle iron fastener.
C A frame clamp.
D A support fastener.
Technical nomenclature
No. 2 What is the measuring instrument shown on the left top ?
A An outside calliper.
B An outside pipe calliper.
C A Dornier calliper.
> D A Vernier calliper.
Vernier caliper is the correct name
No. 3 What is the accuracy of the measuring instrument shown on
the top left ?
> A 1/10th to 1/20th millimetre B 1/20th to 1/25th millimetre
C 0.1 to 0.5 millimetre
D 0.1 to 0.25 millimetre
A vernier caliper has an accuracy of 0.1 to 0.05 mm , or 1/10 to 1/20th millimetres
No. 4 Suppose you need to draw a circle of 186 mm diameter on
metal or on a packing sheet. How would you do this using the compass shown top centre ?
A Measure 186mm on packing, draw 2 lines through the centre.
> B Set opening of compass legs to 93 mm using a steel ruler.
C Indicate straight line with points 0mm, 93mm and 186mm on
packing.
D Project first a hexagon on packing or steel plate.
If you are to project a circle of "X" mm on a plane you are to adjust the opening of the compass legs at X : 2 'You do this by setting the leg opening on a steel ruler and actual adjustment is done by adjusting the screw on the side of the No. 5 What is the accuracy of a micrometer shown top right ?
A 0.1 to 0.2 millimetres.
B 0.1 to 0.5 millimetres.
> C 0.01 to 0.005 millimetres.
D 0.05 to 0.01 millimetres.
Option <Option3> is correct. 0.01 to 0.005 mm corresponds to between 1/100 and 1/200th of one millimeter.
No. 6 What is the measuring device shown at the bottom ?
A A tracing instrument
> B A right angle plane tracer.
C An angular tracer.
D A 90 degree angle projector.
Option <Option2> is correct. It is used to project 90 degree lines in relation to the side of the metal against which the measuring device is held.
No. 7 What is the measuring device shown in the top and what is it
used for ?
> A A thread gauge. To measure thread size on bolts and studs. B A bolt thickness gauge. To measure the size of bolts.
C Thread thickness gauge. Measure clearance of bolts and nuts.
D Thread wear down gauge. Measures wear-down on bolts /
nuts. Self explanatory. The thread patterns are held against the
thread to see which one is matching.
No. 8 What measuring device is shown in the bottom left corner ?
A A pipe calliper.
B An inside tracer.
> C An adjustable inside calliper.
D A bore calliper.
This inside caliper can be fine-adjusted by adjusting the screw fitted on the side which will keep the outward force in check brought by the top spring blade. This type of caliper can be used with more accuracy than a simple two legged No. 9 What is the purpose of the calliper shown in the bottom left
corner ?
A Measuring piston ring gaps.
B Measuring fuel pump lifts.
C Measuring inside diameters of hydraulic pipes.
> D Measuring inside diameters or gaps.
This is an adjustable INSIDE caliper. The spring blade on top forces the legs outward. By releasing the screw after the caliper is inserted in the bore or gap the legs will slide against the inner surface of the item which is to be
No. 10 What is the measuring device shown in the right bottom corner ?
A A flange calliper.
B A pipe calliper.
C An adjustable pipe calliper.
> D An adjustable outside calliper.
This is an adjustable OUTSIDE caliper used to measure diameters or outside measurements. Its spring blade on top forces the legs outwards but the force is caught by the retaining screw.
No. 11 How will the tool shown at the top be powered if it is to be
used on tankers ?
A By battery power, 12 Volt maximum.
B By AC power 110 Volt, 60 Hz maximum.
> C By compressed air 8.5 kg/cm2 maximum.
D By compressed air 3.5 kg/cm2 maximum.
No flexible wiring or electric tools are allowed to be used outside the engine room on tankers. A powered tool is therefore to be driven by air or water. The air pressure is the ship's working air of 8.5 kg/cm2 maximum.
No. 12 For what are RECOIL-LESS HAMMERS used ?
> A To assemble tight fitting parts. B To chisel deep grooves in metal.
C To hammer on ring spanners.
D To test the foundation bolts of engines.
They are used in the assembly of tight fitting machinery or motor parts, e.g. to fit the end covers of an electric motor in place or to fit a tight sleeve on a shaft etc...They are usually lead shot hammers, their weight ensuring that there is no
No. 13 What kind of tool is shown top left and for what is it used ?
A A ratchet spanner / Used on main engine piston crowns.
B A torque spanner / Used on foundation bolts.
C A forged torque spanner / Used to hammer nuts.
> D A forged ring spanner / Used to be hammered by a
sledgehammer. This is a forged ring spanner, intended for heavy duty, for
hammering nuts loose or fast by using a sledgehammer or heavy hammer for smaller size nuts
No. 14 What is the tool shown upper right ?
A A bearing cap-wrench.
B A purifier assembly wrench.
C An orifice removal wrench.
> D A hydrant wrench.
This is a hydrant wrench. The pin is inserted in the round slot of the hydrant cap or in the round slot of ANY retaining cap and torque applied to open or to close as required. Used on hydrants, purifiers, telescopic piping etc.. They come in No. 15 What tool is shown bottom left and for what is it used ?
> A Articulated socket wrench/ Out of centre extension. B Square ratchet wrench / 45 degree out of line wrench.
C Flexible socket spanner / For sunken nuts removal and fitting.
D Flexible ratchet wrench / As extension for ratchets.
This is the flexible out of centre handle of an articulated socket wrench.
No. 16 What kind of tool is shown right bottom and into what does it
fit ?
A A bar wrench / It fits into exhaust gas pipe fastening bolts.
B An angle wrench / It fits into cylinder cover plugs.
> C A socket bolt wrench / It fits into Allen Bolts (Allen keys).
D A torque wrench / It fits over nuts.
This is a socket bolt wrench or also called an "ALLEN" key. It fits into the heads of "ALLEN" bolts.
No. 17 What kind of wrench is shown upper left ?
A An adjustable spanner.
B A spring wrench.
C A Stillwell adjustable wrench.
> D A Stilson wrench.
This is a STILSON wrench used to clamp and fasten on round or worn surfaces. It finds its grip and is self locking but leaves marks on the surface. Not to be used on nuts in good condition.
No. 18 What kind of tool is shown upper right ?
A A Stilson wrench.
B A pipe wrench.
C An adjustable nut wrench.
> D An adjustable vice grip wrench.
This is an adjustable vice grip wrench. Used on piping or worn nuts etc.. The force applied to the surface by the claw is not in proportion to the torque applied as is the case with the Stilson wrench
No. 19 What is the tool shown bottom left ?
> A A ratchet spanner.
B A flexible ring spanner.
C A forged flexible star-spanner
D A torque ring spanner.
This is a ratchet spanner. The ring is fitted inside a ratchet ring. It comes in various sizes (Spanner sizes are not interchangeable)
No. 20 What kind of tool is shown top right ?
A A star spanner, double forged.
B A mechanic's spanner.
C A common bolt spanner, double forged.
> D A double ended open jaw spanner.
This is a double ended ring spanner preferably used on all easily access able nuts.
No. 21 What is the tool shown top left ?
A A flat mechanic's double spanner.
> B A double ended ring spanner.
C A double flat spanner.
D A forked double spanner
This is a double ended open spanner, used where no space exists to use a ring spanner or where a ring spanner cannot be lifted over the nut or nipple.
No. 22 What kind of tool is shown bottom left ? How can it be Tools6a.BMP
extended ?
A A star spanner / Extended by torque bar.
B An open spanner / Cannot be extended.
C A double hexagon spanner / Extended by rod.
> D A single ended ring spanner / Extended by a pipe or tube.
An additional torque can be applied on this spanner by sliding a pipe over it to obtain extra leverage.
No. 23 What kind of tool is shown bottom right bottom ?
> A A combined open ended spanner and socket wrench. B A flat ratchet spanner.
C A socket wrench forked spanner.
D A single ended forked ratchet wrench.
This is a combination spanner. On one side is the spanner open ended, on the other side is it a socket wrench of the same size.
No. 24 What kind of assembly does the upper left piece and the
upper centre piece make ?
> A A socket wrench assembly.
B A ratchet spanner.
C A ratchet lever assembly.
D A ratchet torque assembly.
The socket wrench consists of the socket and the lever as shown.
No. 25 What kind of tool is shown on the bottom left corner of the
picture and when is it used ?
A A rod spanner / For cylinder cover tightening.
B An extended spanner / When the nut is found frozen.
C A hexagon fork spanner. / To apply extra force when
tightening.
> D A pinchbar spanner / When there is no side space available.
The pinch bar spanner is used when there is no space available on the side or around the nut where a conventional spanner cannot be used. No. 26 What kind of tool is shown bottom centre ?
A An adjustable pocket spanner.
> B A pipe wrench.
C A shifting spanner.
D A Stilson wrench.
This tool is a vice grip wrench. Force applied to the nut is not in proportion to the torque applied on the nut when loosening or tightening.
No. 27 On what equipment should the wrench shown bottom right be used ?
A On bolts and nuts.
B On broken studs.
> C On large diameter pipes and shafts.
D On electric motor couplings.
A chain wrench is used to grip on the circumference of piping and rods, or other components that are circular.
No. 28 The tools shown here are ...?
A engineer's tools.
> B electrician's tools.
C duty engineer's and watchkeeper's control room tools.
D welder's tools.
These are insulated handgrip tools and therefore Electrician's tools. The bolt and wire cutter shown on the bottom right of the drawing is standard outfit for your domestic home maintenance electrician, but is seldom No. 29 What is the tool shown top left called and by whom is it
mostly used ?
A Welding rod pliers / fitters and welders.
B Manometer curved pliers / engineers.
C Instrument long nose pliers / Automation and control engineers.
> D Curved long nose pliers / Electricians.
The name indicates what is actually seen. A curved long nose pliers is for general use and not used by anybody specifically, however the long nose pliers shown in the picture have INSULATED hand grips, indicating that it is an No. 30 What is the tool shown top right and by whom is it used ?
A Combination pliers / For general use.
B Electrician's pliers / By the electrician.
C Mechanical pliers / By the engineers and fitters.
> D Flat nose pliers / By the electrician.
As shown these pliers have flat noses and are called flat nose pliers. It is a tool for general use. However, the picture shows that the pliers have insulated handgrips and therefore it is an ELECTRICIAN'S tool. Most pliers of this type do not
No. 31 What is the tool shown bottom left and by whom is it used ?
A Inside circlip pliers / By engineers.
B Outside circlip pliers / By engineers.
> C Round point pliers / By electricians.
D Eye nose pliers / By the electrician.
These are round point pliers, a tool for general use. However on the tool shown there are the insulated handgrips, indicating that it is an electrician's tool.
No. 32 What kind of tool is shown bottom left ? What is its use ?
A Mason's chisel / To break up cement boxes.
B Blacksmith's chisel / To cut steel bars and rods.
C Hot chisel / To cut bolts and nuts.
> D Cold chisel / A general purpose cutting and splitting tool.
The cold chisel is a general purpose tool used for cutting and splitting any material softer than the nose of the chisel. The chisel nose is generally hardened.
No. 33 If the welding torch and the oxygen/acetylene pressure regulators are fitted in the engine room workshop, to what should they be connected ?
A The oxygen and acetylene bottles.
> B Oxygen and acetylene pipe lines.
C Gas bottles depending the material to weld.
D Safety valves.
No Gas bottles are allowed to be stored in the engine room. If gas welding is available on board, the bottles are stored in a well ventilated open compartment venting to the upper deck and pipe lines with non-return valves are fitted leading
No. 34 When igniting the welding torch, how would you proceed ?
A Open acetylene, ignite, than adjust flame with oxygen.
B Open oxygen and acetylene, than ignite
C Open acetylene, ignite, open oxygen than adjust flame
> D Ignite whilst controlling acetylene, open oxygen, adjust flame
You are to control the acetylene whilst igniting. At all times you need your flame to be under control. Once there is a controlled acetylene flame you should open the oxygen, then adjust the flame to the desired intensity. Never open No. 35 What is the gas welding equipment shown right side ?
A A heavy duty welding torch.
B A blow-by torch.
> C A cutting torch.
D An illumination torch.
This is a gas cutting torch. The purpose is to cut through steel. The lever on the lower part of the handle is to "blow" the hot metal during burning.
No. 36 How should oxygen and acetylene bottles be transported. ?
A In a safety net, well secured..
B In a special provided stand with clamps.
C With the caps secured by gas-tight tape.
> D In an upright position.
Regulations require gas bottles be transported in upright position.
No. 37 Depending on the plate thickness to be cut you should
increase ...?
A the acetylene flow.
B the oxygen flow.
C the oxygen and the acetylene flow.
> D the nozzle size.
By increased capacity requirement (increased plate thickness) it is necessary to increase the nozzle capacity by using a bigger size nozzle in the cutting torch.
No. 38 If you are welding in the workshop, you must ensure in
advance that the bridge is told and that ...
A the Chief Engineer is informed as well.
B the emergency fire pump is started.
C the fire extinguishers of the engine room platform are not
expired.
> D the fire alarm for the workshop platform is switched off.
The duty engineer is to be informed on all occasions, not the Chief engineer. The bridge is to be informed and the fire detection loop covering the workshop is switched off, as the fire alarm will be activated by the smoke produced, and No. 39 What is the function of this hydraulic stressing tool when
fastening and unfastening bolts/nuts on an engine ?
A To fasten or unfasten the nut.
B To press the part to be fastened together or down so that the
nut can be tightened by hand.
C To apply pressure on cylinder head or bearing so that the bolts/nuts can be tightened by hand.
> D To elongate the bolts at required stress value so that the nuts
can be tightened to the position to ensure correct The bolts or studs are elongated by pre-tensioning to the
pre-tensioning. correct value and the nuts are tightened by hand and the
hydraulic pressure released. This is the correct method for pre-tensioning.
No. 40 The "scleroscope" is used to determining ...
A the "hardness " of a metal..
B the "thickness" of a metal.
C the "brittleness" of a metal.
> D the existence of cracks in metal.
No. 41 Which of these four screws is a fillister head screw ?
> A No 1 B No 2
C No 3
D No 4
No. 42 What type of screw is No. 2 ?
A A hexagon head screw.
B A button head screw.
> C A flat head screw.
No. 43 What type of screw is No. 3 ?
A A button head screw.
> B A hexagon head screw.
C A fillister head screw.
D A flat head screw.
No. 44 What type of screw is No. 4 ?
A A hexagon head screw.
B A fillister head screw.
C A flat head screw.
> D A button head screw.
No. 45 For cutting hard materials, metal saws with
... blades should be used ?
A large pitch.
> B small pitch.
C sharp angle teeth.
D dual angle teeth.
Option <Option2> is correct. Saws with small pitch must be used (8 teeth per cm of length). Also use a small pitch saw for cutting small strip objects, so that several teeth are cutting at the same time.
No. 46 When starting to tap a hole, how is the process checked for perpendicularity? A By sighting. B By spirit level. > C By try square. D By straight edge.
No. 47 What general name is given to files which remove maximum
metal in the shortest time?
A Single cut .
B Draw file.
> C Double cut.
D Bastard.
No. 48 The figure shows welded tee joints. What preparation is required for No.2 ?
A Single bevel
> B Double bevel
C Double V
D Double U
No. 49 When fitting new bottom ends to a small diesel engine, the
bottom end bolts have no locking devices. Which of the following should be fitted.
A Taper pins
B Bifurcated taper pins
C Parallel pins
> D Split pins
1.2.2.5 Screw Thread Fasteners - Use split pins which are used after drilling. The other devices require a reamed hole and, apart from B, would probably drop out during use.
No. 50 The sketch shows the rollers for a pyramid rolling machine.
Which is the idler?
> A No.1 B No.2
C No.3
D No.4
1.1.3.13 Forming - See sketch
No. 51 What device is fitted to prevent component gases mixing in
hoses?
A A relief vale.
B A stop valve.
C A by-pass valve.
> D A hose check valve.
No. 52 The diagram shows four types of machine screws. Identify the
cheese head screw.
A No.1
B No.2
C No.3
> D No.4
1.2.2.5 Screw Thread Fasteners - See diagram
No. 53 Identify the powered hand tool No. 2 ?
A Drill
B Grinder
C Screwdriver
> D Input wrench
1.2.1.3 Powered Hand Tools - See sketch
No. 54 Perspex is an example of a thermoplastic, How is this best
heated prior to bending?
A Heat in an oven.
> B Heat in boiling water.
C Flame heat.
D Hot air stream.
No. 55 It is required to make a drip tray. What machine would be
used?
A Powered brake press.
B Rolling machine.
> C Hand operated folding machine.
D Nibbler.
No. 56 In readiness for use, a good scraper would have it's cutting
edges? A Ground Oil stoned Highly tempered > B Ground Oil stoned Lightly tempered C Honed Sand stoned Highly tempered D Polished
Sand stoned 1.2.1.2 Hand Tools - It is necessary to keep the cutting edges
Lightly tempered very sharp. Hence, lightly tempered allows for finishing off after grinding with an oilstone.
No. 57 A method of joining two plastics together is by solvent welding. What is this process?
A Application of a thin film of adhesive to joining surfaces.
> B Adhesive is applied and dissolves the plastic material being
joined.
C A heating tool is applied with pressure to required join.
No. 58 When gas cutting a mild steel plate, what does the size of
nozzle used depend upon?
> A Thickness the of plate B The gases used
C Impurities in the material
D Gases remaining in the cylinder
No. 59 The sketch shows a partially completed knocked up joint made from 0.5 mm plate. Which direction of bending completes the joint?
A No.1
> B No.2
C No.3
D No.4
1.1.3.4 Self Secured Joints - The right-hand overhang is knocked up against vertical. See sketch
No. 60 .A short box girder is fabricated from 8 mm steel plate. What
edge preparation is required for No.2 ?
> A None.
B Single bevel Closed corner.
C Double bevel closed corner.
D Double U.
1.1.3.8 Welded Joints and Common Faults - NB Will not give a square corner. See sketch
No. 61 Welding fumes can be dangerous. When welding in the
workshop how is welding rendered safe?
A By respirator.
B By extraction.
> C By ventilation.
D By extractor welding gun.
1.1.3.5 Safety and Health when Welding - The good ventilation will ensure safe working practice.
No. 62 Which set of equipment is required to mark out the keyway of
a 30 mm diameter shaft? A Porthole glass Slip gauges Scriber B Dial gauge Vee block Dividers Vernier protractor
C Polish flat bar
Slip gauges
Scriber
Engineer's square
> D Surface plate
Vee block
Vernier height gauge Dividers
No. 63 A blind hole in a valve casing requires to be tapped 12 mm.
Which tap(s) would be used?
A Plug.
B Second and plug.
C Taper and plug.
> D Taper, second and plug.
1.2.1.2 Hand Tools - The taper would ensure squareness; the second, the thread had started; the plug that the thread goes to bottom of hole.
No. 64 For the fillet weld shown, what is the throat length?
A ad
B ae
C Db
> D af
1.1.3.8 Welded Joints and Common Faults - Should be 0.707 of ab. See sketch
No. 65 A crankcase weld requires detailed inspection while on passage. How would this be carried out?
A By x-ray.
B Visually.
> C By dye penetrant.
D By magnetic particle.
No. 66 Which gas is NOT commonly used as a fuel when cutting
steel plate?
A Propane.
B Acetylene .
C Natural gas.
No. 67 When bonding together two metal components, what is the
correct sequence?
A Clamp together.
Add activator to epoxy resin. Apply to edges removing surplus.
B Add activator to epoxy resin.
Clamp together.
Add activator to epoxy resin.
Clamp together.
> C Clean and rough surfaces.
Add activator to epoxy resin.
Apply to surfaces and Clamp together.
D Clean and rough surfaces,
Add activator to epoxy resin. 1.2.1.7 Adhesives and Bonding - Glue line is 0.02 to 0.2
Apply to surfaces and Clamp together only when tacky. mm and curing time may be up to 12 hours. No. 68 When gas welding, which is the most likely cause of a serious
accident?
A Touching hot metal.
B Flying sparks.
C Leaving torch on floor.
> D Not extinguishing when finished.
1.1.3.5 Safety and Health when Welding - Always extinguish when not welding.
No. 69 For the square pyramid float component shown, which is the
correct development?
A No.1
B No.2
C No.3
No. 70 Which of the materials listed can be cut using an oxygen fuel gas mixture? A Bronze. B Stainless steel. C Cast iron. > D Mild steel.
No. 71 What is the limiting factor of a visual inspection of a weld?
A There is none.
B It will not show if penetration is correct.
C It will not indicate blow holes.
> D It gives an indication only.
No. 72 When working with bonded resins what is their useable pot
life?
> A 2 to 3 minutes. B 4 to 6 minutes.
C 9 to 10 minutes.
No. 73 What general name is given to files used for finishing?
> A Single cut . B Draw file.
C Second cut.
D Smooth.
No. 74 Which column gives the correct factors for a clean cut edge
preparation?
> A Flame adjustment.
Speed of travel.
Distance between plate and nozzle.
B Flame adjustment.
Speed of travel.
Angle of nozzle to plate.
Polished surface. C Flame adjustment. Speed of travel. Oversized nozzle. Pressure. D Flame adjustment. Angle of nozzle to plate.
Undersized nozzle.
Polished surface.
No. 75 Which of the following size nominations is most commonly used?
A Actual size.
B Basic size.
> C Nominal size.
D Limit of size.
1.2.2.10 Limits and Fits - Often used to describe threads and pipes.
No. 76 What is the plate thickness limit for hand-operated folding machines? > A 2.5 mm B 3.0 mm C 3.5 mm D 4.0 mm
No. 77 Which system uses a tungsten electrode, causing an arc
between itself and the metal to be cut?
A Electric arc cutting.
B Molten arc cutting.
C Arc cutting.
> D Plasma arc cutting.
No. 78 A repair to a compressor requires a plate of the form illustrated
to be designed. Which illustration is dimensioned to be the correct standard.
A No.1
B No.2
C No.3
> D No.4
No. 79 The speed and feed for a 20 mm diameter reamer would be?
A Same as a drill.
B 75% less than a drill.
> C 50% less than a drill.
D 25% less than a drill.
1.2.1.5 Drilling Machines - Usually less than 50% with copious supply of cutting fluid. Left hand spiral prevents cutting ahead of finish.
No. 80 A scriber should not be used for marking out?
A When material is copper.
> B When material is to be bent.
C When material is to be hot worked.
D When material is plastic.
1.2.1.1 Marking Out - Scribing is metal removal and may lead to cracking.
No. 81 Hoses are easily damaged and require special care for long
life, but what are they reinforced with?
> A Canvas.
B Cotton.
C Nylon.
D Wire.
1.1.3.7 Principles of Gas Welding - Rubber and neoprene are soft.
No. 82 The diagram shows four types of socket head screws. Identify
the socket shoulder screw.
A No.1
> B No.2
C No.3
D No.4
1.2.2.5 Screw Thread Fasteners - See sketch
No. 83 What dictates the size of drill hole required prior to cutting an
internal thread?
> A The core diameter.
B The outside diameter.
C The thread form.
D The thread pitch.
No. 84 When welding at a bench, which list of equipment would be
used? A Leather gloves Leather apron Safety boots > B Leather gloves Boiler suit Safety boots Welding helmet C Leather gloves Leather apron Welding helmet Safety Boots D Leather gloves Leather apron Boiler suit Breathing apparatus
No. 85 Which of the following effects could be reduced if hand
powered tools were used?
A Over familiarity
Use of safety glasses Tiredness > B Fatigue Loss of concentration Accidents Inaccurate work C Distraction
Use of hard hat Cramp
Eye strain
D Injury to hands
Tools correctly sharpened Loss of concentration Fatigue
No. 86 What effect will an undersized vee width have on the form produced?
> A Outside bend may fracture. B Inside bend may fracture.
C Outside bend may be scuffed.
D Inside bend may be polished.
No. 87 Which correctly identifies a full acetylene cylinder ?
A 170 bar right hand thread black colour.
B 170 bar right hand thread blue colour.
> C 15 bar left hand thread maroon colour.
No. 88 Which material is difficult to weld due to porosity?
A Cast iron.
B Low carbon steel.
C Medium carbon steel.
> D High carbon steel.
1.1.3.6 Principles of Electric Arc Welding - Porosity caused by oxidation of carbon.
No. 89 When out of use temporarily, how should the workshop
surface plate be stored?
A Covered with grease.
> B Covered with a wooden cover.
C Wiped with an oiled rag.
D Covered with a cloth sheet.
No. 90 A 1.3 m long slot is to be marked off on the floor plate but only
a 300 mm straight edge is available. How is this overcome?
A By using a cardboard template.
B By using a piece of wood.
C By using a length of tape.
No. 91 What is the softening temperature for PVC?
A 100°C
B 105°C
C 110°C
> D 115°C
No. 92 Which type of examination reveals pin holes, slag inclusion
and lack of fusion?
A Dye penetrant.
B Visual.
C Fluorescent penetrant.
> D Macroscopic.
No. 93 What is a trammel used for?
A For cutting out joints
> B For scribing large circles
C Substitute if dividers are unavailable
D For marking off pipes
1.1.3.10 Plate work marking out - i.e. Larger than possible by dividers.
No. 94 A frustrum of a hexagonal pyramid is shown. Which drawing
goes to the left of the figure in third angle projection?
> A No.1 B No.2
C No.3
D No.4
1.2.2.2 Linework - See sketch
No. 95 What is the effect of low pressure cutting oxygen?
A Combustion will not occur.
B Melting point will not be reached.
> C The melt will not be blown out.
D The cut will be ragged at edges.
1.1.3.11 Thermal Cutting - Oxidation is too slow.
No. 96 The Vernier protractor gives an angular accuracy of?
A 7 minutes of angle.
> B 5 minutes of angle.
C 1 minute of angle.
D 3 minutes of angle.
1.2.1.4 Measurement - The main scale is marked 0 to 90° each way. It has 12 dividers occupying 23° of the main scale. ° one Vernier division = 23/12 = 1 11/12° i.e. 1/12 or 5' less than 2°
No. 97 Dimensions are read from the bottom of the drawing but if this
is not possible what is the next choice?
A Turn drawing clockwise 45. reading from RH side.
B Turn drawing anti-clockwise reading from RH side.
C Turn drawing anti-clockwise reading from LH side
> D Turn drawing clockwise reading from RH side
1.2.2.9 Dimensioning - Reading from right hand side.
No. 98 After sharpening a twist drill, which points are the most important to check? A Web size Rake angle Flank condition B Land Overall length Chisel edge Helix angle > C Clearance angle Chisel edge angle
Point angle
Lip length
D Flute length
Face of drill 1.2.1.5 Drilling Machines - The answers are all relevant
Ensure no rough grinding marks otherwise errors will occur.
Lip length
No. 99 When fitting a blade into a hacksaw, which direction should
the teeth be pointing relative to the handle?
A Towards the handle.
B Towards if blade is fitted at 90 degrees to normal
C Towards if blade is fitted at 180 degrees to normal
No. 100 In the following gas flame temperatures, which is the oxy-acetylene? A 1880°C B 2770° C 2820° > D 3200°C
1.1.3.7 Principles of Gas Welding - Most metals require a 50/50 mixture (neutral flame) for a successful weld.
No. 101 During a plasma cutting process the workpiece was not totally
penetrated. What would be the most likely problem?
> A Speed of cut too high. B Speed of cut too low.
C Current is too high.
D Metal is too porous.
No. 102 What is shown in No. 1 ?
A Small circle guide.
B Roller guide.
> C Spade guide.
D Radius bar.
1.1.3.11 Thermal Cutting - Attachment used with a straight edge for straight cuts. See sketch
No. 103 How does the brake press differ from the other forming
machines?
A Uses rollers
> B Uses male and female formers
C Can pierce only
D Can crop only
No. 104 When using third angle projection, viewing the component from x, which drawing will be above the front elevation?
A A
B B
> C C
D D
1.2.2.2 Linework - See sketch
No. 105 A flashback arrester has been triggered. Which is the correct
sequence to follow after this event?
A Ascertain cause of activation
Clean, if necessary
Check equipment
B Clean, if necessary
Check equipment
Open up flashback arrester Ascertain cause of activation > C Ascertain cause of activation
Check equipment
Open up flashback arrester Clean, if necessary
D Check equipment
Open up flashback arrester 1.1.3.7 Principles of Gas Welding - Always find out why it
Clean, if necessary activated first.
No. 106 When self-secured joints are to be made, which tool is most
useful?
A A press.
> B A folder.
C Tin snips.
D A rubber headed hammer.
No. 107 Which table best describes the flexible hacksaw blade?
A Only teeth hardened
Reasonably non-rigid Overheats unless liquid cooled
B Only teeth hardened
Easily broken if misused Has a long life
Reasonably non-rigid
C Only teeth hardened
Easily broken if misused Reasonably non-rigid
Overheats unless liquid cooled > D Only teeth hardened
Reasonably non-rigid Not easily broken Has a long life
No. 108 If a gas pressure gauge is over-pressured and bursts, what
feature minimizes damage?
> A The flexible back. B A relief valve.
C A bursting disc.
No. 109 The sketch shows the two scales of a Vernier caliper. What
degree of accuracy will a measurement have?
A 0.01
> B 0.02
C 0.03
D 0.04
1.2.1.4 Measurement - See sketch
No. 110 When two pieces of metal at right- angles are welded together,
what weld is used?
> A Fillet
B Butt
C Bevel
D Lap
No. 111 What condition must exist in order to cut using an oxygen fuel
gas mixture?
A Slow oxidation.
> B Rapid oxidation.
C Slow temperature rise.
No. 112 Why is a high pressure blow pipe unsuitable for use in a low
pressure system?
A The nozzle sizes are different.
B The oxygen pressure differs.
C The acetylene pressure differs.
> D Both gas pressures must be equal.
1.1.3.7 Principles of Gas Welding - In low pressure system, acetylene supplied at low pressure and hence induction system needed.
No. 113 The engine room workshop carries different types of hacksaw
blades. Which blade should be used to cut sheet metal?
A Tooth pitch = 6/cm
B Tooth pitch = 8/cm
C Tooth pitch = 10/cm
> D Tooth pitch =14/cm
No. 114 A centre punch has a 60° point for?
A Ease to see.
B Use as scriber.
C Long life.
No. 115 What type of ball- bearing is shown in the illustration?
A Shallow groove.
B Two-way thrust.
C Heavy duty.
> D Deep groove.
No. 116 If two pieces of metal are welded together while laying in the same plane, this is known as?
A A lap weld.
B A corner weld.
C A fillet weld.
> D A butt weld.
No. 117 Which table would give the best checklist following an arc welding process, checking for:
> A Fusion
Undercutting Surface pin holes
B Fusion Undercutting Slag inclusion Excessive spatter C Slag inclusion Fusion Undercutting Contour D Undercutting Surface pin holes Fusion
No. 118 In the system of limits and fits shown, on what basis has the
drawing been made?
A Interference fits.
B Shaft basis fits.
> C Hole bases fits.
D Clearance fits.
1.2.2.10 Limits and Fits - See sketch
No. 119 A white metal lined bearing is to be fitted on to a shaft. Which combination would be used?
A Use a flat scraper with engineer's blue on bearing.
B Use a flat scraper with engineer's blue on shaft.
> C Use a half-round scraper with engineer's blue on shaft.
D Use a half-round scraper with engineer's blue on bearing.
1.2.1.2 Hand Tools - The engineer's blue gives the high spots and these would be removed until an even distribution was apparent.
No. 120 For the fillet weld shown, what is the throat length?
A ab
B ac
> C ad
D de
1.1.3.8 Welded Joints and Common Faults - Should be 0.707 of ab. See sketch
No. 121 What is the greatest danger when working with sheet metal?
A Plate is too large.
B Plate is too heavy.
> C Edges are sharp.
D Space to manoeuvre is usually restricting.
1.1.3.13 Forming - Initially wear gloves. All finished components should be edge finished.
No. 122 A flat chisel requires tempering; which temperature and colour
is correct for this process?
A 240°C dark straw.
B 250°C light brown.
> C 260°C dark brown.
D 280°C purple.
No. 123 Thick plates require a multi-run weld. Which type of runs are used?
A No.1
B No.2
C No.3
> D No.4
No. 124 Identify the powered hand tool in No. 1 ?
> A Drill B Grinder
C Screwdriver
D Input wrench
1.2.1.3 Powered Hand Tools - See sketch
No. 125 The square to round section shown requires a template. What forms the triangular base line from which the true lengths are obtained? A ab a1 > B a1 a2 C a2 ab D ax ab
No. 126 How is the emergency stop button indented on workshop
machinery, for example, the lathe?
A Large round head with light emitting diode insert.
B Large round head painted green.
> C Large round head painted red.
No. 127 In electric arc welding, what purpose does the the electrode
coating serve?
> A It provides a gas shield
Reduces splatter
Gives a stable arc
B Gives a variable arc
Reduces splatter
Tolerates poor welding Assists multi-runs
C Allows damp electrodes to be used
Gives a stable arc Reduces slag inclusion
Reduces Porosity
D Controls the metallurgical properties Assists penetration
Tolerates poor welding
Reduces splatter
No. 128 Which of the four bearings shown provides positive location?
A No.1
B No.2
> C No.3
D No.4
No. 129 The figure shows welded tee joints. What preparation is required for No.3 ?
A Double U
B Double bevel
> C Single bevel
No. 130 All mechanical cutting devices have the same basic features.
These are?
A One moving blade
B One fixed blade
C Two moving blades
> D One moving and one fixed blade
No. 131 The engine room workshop has a bench shear. What is the maximum thickness of mild steel it will cut?
A 1 mm
B 3 mm
> C 5 mm
D 7 mm
No. 132 For the cover shown, what length of plate is required?
A 350.2 mm
B 348.4 mm
C 345.1 mm
> D 343.7 mm
No. 133 How does a two-stage pressure regulator give precise control?
A Both stages are adjustable
B First stage only is adjustable
> C Second stage only is adjustable
D Automatical regulation of both stages.
1.1.3.7 Principles of Gas Welding - Pressure drops from, say, 169 bar to 4 bar. Therefore, constant 4 bar regulated in 2nd stage to desired pressure.
No. 134 When using a centre lathe what operation could a hacksaw be used for?
> A Cutting off. B Shaping.
C Cutting threads.
D Removing burrs.
No. 135 A chisel is refurbished and requires the cutting end to be
tempered after hardening. How is this achieved?
A Heat to 230.C Quench in oil. B Heat to 280.C Quench in oil > C Heat to 260.C Quench in water D Heat to 250.C Quench in water
No. 136 In the following, which gives advantages only for adhesive
bonding?
A Needs good surfaces/no protruding parts.
B Poor electrical conductivity/may act as an insulator.
C Toxic hazards/reduced galvanic action.
> D Weight reduction/may join thin sheet.
No. 137 What is significant about the spring-back hacksaw blade?
A It can be bent into a circle over its length.
> B It is a compromise between the flexible and all-hard blade.
C It is only available with a large tooth pitch.
D It is only suitable for use in a power saw.
No. 138 The drawing of an engine mechanism component gives some
surfaces as angles. How would these angles be marked out?
A With a steel rule.
B With dividers.
C With odd leg callipers.
No. 139 An acetylene welding cylinder is packed with charcoal and
charged with acetone. At 15 bar by how many times will it absorb its own volume ?
A 275 times
B 325 times
> C 375 times
D 425 times
1.1.3.7 Principles of Gas Welding - NB Discharge rate max = 1/5 of cylinder pressure/hour. Above, acetone will be discharged.
No. 140 A short box girder is fabricated from 8 mm thick steel plate.
What edge preparation is required for No.1 ?
A Double bevel 60°
B Double bevel 45°
C Single bevel 60°
> D Single bevel 45°
1.1.3.8 Welded Joints and Common Faults - Gives a square corner (preparation angle 45°). See sketch
No. 141 Which of the tables of defects would lead to porosity in a
welded joint?
A Welding current too low.
Speed of travel too fast.
Incorrect electrode manipulation. > B Damp electrode coating.
Damaged electrode coating. Too long an arc.
Incorrect starting.
C Wrong electrode angle.
Incorrect joint set up. Speed of travel too fast. Welding current too low.
D Welding current too high.
Incorrect root gap. Incorrect electrode size. Dirty parent metal.
No. 142 What feature of a good weld is indicated by No.4 ?
A Good penetration.
B Blend with parent metal.
> C Contour even and regular.
D Backing bar has been used.
1.1.3.8 Welded Joints and Common Faults - See sketch
No. 143 Mild steel plate 2 mm thick bent in vees would produce an
approximate inside bend radius of?
A 1.0 mm
B 1.5 mm
> C 2.0 mm
D 2.5 mm
1.1.3.13 Forming - Radius equates to metal thickness.
No. 144 What is the system called which gives explicit instructions on
drawings which cannot be misinterpreted?
A Cumulative effect.
> B Geometrical tolerancing.
C Limits and fits.
No. 145 When carrying out a repair using a bonded resin what
precautions should be observed?
A Use gloves, do not smoke,use barrier cream and use safety
goggles.
B Use gloves, ensure below flash point of material, use brush
and use safety goggles.
C Use gloves, use stirrer, take care opening tins and use safety
goggles.
> D Use gloves, use brush use barrier cream and use safety
goggles. 1.2.1.7 Adhesives and Bonding - Main protection is against
dermatitis.
No. 146 Looking at the drawing, can this component be made?
A Yes.
B No - material is not given.
C No - scale is not given.
> D No - relevant dimensions are missing.
1.2.2.2 Linework - Dimensions for slot are missing.
No. 147 Which is the preferred table to be checked to ensure a sound
weld is produced during an arc welding process?
A Electrode Arc length Ambient > B Electrode Arc length Welding current Electrode angle C Arc length Welding current Electrode angle Relative humidity D Arc length Electrode angle Ambient temperature Relative humidity
No. 148 What presents the greatest danger when sharpening a chisel
on a grinding machine?
A Wrong grade of wheel.
B Worn wheel.
> C Exsessive rest clearance.
D Using too much force.
1.1.4.1 Safety - Chisel could be drawn into the gap.
No. 149 When tempering a cold chisel, at which part of the chisel is the flame directed?
A The cutting edge.
B The hammer end.
C Mid-way.
> D The beginning of the tapered portion.
No. 150 What may be done to improve the finished appearance of a
self-secured joint?
A Caulk.
> B Solder.
C Burnish.
D Fit edging wire.
No. 151 What special care do an engineer's dividers need :
A Keep oiled.
B Keep screw thread clean.
C Always use same leg in centre pop.
> D Protect points when not in use.
2.1.1.1 Marking out - These are all important for efficient use.
No. 152 Thermoplastic type adhesives soften when subject to heat, are
fusible and soluble. They are not suitable for?
A Leather.
B Wood.
> C Aluminium.
D Fabrics.
1.2.1.7 Adhesives and Bonding
No. 153 The ventilation trunk shown goes from square to round section.
What does its development look like?
> A No.1 B No.2
C No.3
No. 154 To make a single grooved seam from 1 mm plate, in what
order would the following operations be carried out?
A Set to thickness Hook together Fold B Fold Hook together Flatten Set to thickness C Flatten Set to thickness Fold Hook together > D Fold
Set to thickness 1.1.3.4 Self Secured Joints - A grooving tool is used to
Hook together complete the joint.
Flatten
No. 155 In the method of datum dimensioning (sometimes known as
parallel dimensioning), what is the advantage over conventional
dimensioning?
A Makes machining easier.
> B Improves positional accuracy.
C Reduces the marking out time.
D Ignores conventions.
No. 156 What is the attachment shown in No. 2 ?
A Small circle guide.
> B Roller guide.
C Spade guide.
D Radius bar.
1.1.3.11 Thermal Cutting - Used for straight or curved cuts. See sketch
No. 157 The safety features for a welded acetylene gas cylinder are?
A Spring load relief valve.
> B Bursting discs.
C Fusible plugs.
D Gas loaded relief valves.
1.1.3.7 Principles of Gas Welding - On back of cylinder valve. Alternatively, may have two fusible plugs.
No. 158 The sketch shows the configuration of a pinch bending roll.
How does this operate?
A Roller No. 2 rises
B Roller No. 1 is lower
C Rollers No. 2 and No. 3 rise
> D Roller No. 3 rises
1.1.3.13 Forming - See sketch
No. 159 A short box girder is fabricated from 18 mm thick steel plate.
What edge preparation is necessary for No.3 ?
> A Double bevel B Single bevel
C None
D Single U
1.1.3.8 Welded Joints and Common Faults - Gives a square corner (preparation angle 60°). See sketch
No. 160 A component with a working temperature of 325°C is to be
joined using epoxy resin. Which of the following is suitable?
A Epoxy silicone.
> B Epoxy phenolic.
C Epoxy nitrile.
D Phenolic nitrile.
1.2.1.7 Adhesives and Bonding - Tolerate temperatures up to 350°C
No. 161 The figures show welded tee joints. What preparation is
required for No. 1 ?
A Single V
B Double V
C Double U
> D None
1.1.3.8 Welded Joints and Common Faults - See sketch
No. 162 Prior to welding, plate edges are prepared to?
A Allow filler to the flow.
B Give economical use of the filler.
C Give a flat surface to the filler.
No. 163 Which system of welding uses a shield of Argon and a
non-consumable electrode?
A Gas metal arc.
B Metal inert gas.
C Manual metal arc.
> D Tungsten inert gas.
No. 164 For a particular welding arrangement, the decision is to use a
manifold system. Why would this be chosen?
A Because of the long time span of welding
> B The discharge rate is too high from single bottle
C Better stability when using large bore nozzles
D Cost - two cylindersare cheaper than one
No. 165 Plates of less than 6 mm thickness (T) have no edge
preparation but what ratio of (T) is the gap?
A T/6
B T/4
> C T/2
No. 166 When tempering use is made of the microscopic oxide film
formed on the surface, in what sequence does change occur?
> A Straw Brown Purple B Straw Purple Blue Brown C Brown Purple Blue Straw D Purple Straw Brown Blue
No. 167 A 90°centre punch is specifically designed to?
A Act as a pin punch.
> B Pop mark for drilling.
C To scribe.
D Give long life.
1.2.1.1 Marking Out - Previous indent a 60° pop mark.
No. 168 Given a set of odd-leg calipers and a small cork, what use is
the cork?
A Cork is used as centre when marking out.
> B Cork is to protect the point.
C Cork has the same properties as silica gel and prevents
corrosion.
No. 169 In the sketches, which view is incomplete?
A No.1
B No.2
C No.3
> D No.4
1.2.2.2 Linework - See sketch
No. 170 If a view is projected in a direction which is not horizontal or vertical, what name is given to the view?
> A An auxiliary view.
B An isometric view.
C An elevated view.
D A pictorial view.
No. 171 Sketch shows a gas cutting blowpipe. What is control No. 1
used for?
A Acetylene control.
B Pre-heat oxygen.
C Mixing gases.
> D Cutting oxygen.
No. 172 What does the geometrical tolerancing shown in the drawing refer to? A Flatness. B Roundness. C Screw thread. > D Squareness.
1.2.2.11 Geometrical Tolerancing - See sketch
No. 173 What is the maximum number of 50 W bulbs you would recommend to be connected to a 220 V outlet fused with a 10 A fast blowing fuse?
A 20
B 46
> C 44
D 22
No. 174 What is the normal output voltage range of an insulation meter
?
A Between 200 and 300 Volts
B Between 200 and 500 Volts
C Between 500 and 800 Volts
No. 175 Which of the following statements is correct?
A The resistance of a human body increases in a humid
atmosphere.
B The resistance of a human body is unaffected by humidity.
> C The resistance of a human body decreases if the applied voltage is increased.
D The resistance of a human body is unaffected by applied
voltage.
No. 176 What is the normal resistance of the human body?
A 4,000 Ohms at 25 Volt
> B 5,000 Ohms at 25 Volt
C 2,000 Ohms at 25 Volt
D 5,000 Ohms at any voltage
No. 177 Can a current as low as 25mA kill a human being?
A Yes, but only if applied for a long period.
> B Yes, but only if the applied voltage is high enough.
C Yes, but only from an AC source.
No. 178 How many ohms make one megohm?
A 100,000
> B 1,000,000
C 1,000
D 10,000,000
No. 179 Express 125mA in amperes?
A 0.00125 A
B 1.25 A
> C 0.125 A
D 0.0125 A
No. 180 A ship's electrical system is usually the so-called "insulated
neutral" type. What does this means?
A The system's zero voltage point is connected to the frame of
the generator.
> B The system is totally insulated from the ship's hull.
C The system is totally insulated from the ship's 220V distribution system.
No. 181 How will an earth failure be noticed in an insulated distribution
system ?
A The fuse in the faulty circuit will blow.
B The fuse located in the system's neutral point will blow.
C The voltage will drop in proportion to the earth leakage.
> D The system insulation meter will indicate a drop in resistance.
No. 182 What is the purpose of a preference load tripping system ?
A To disconnect important equipment before a short circuit can
cause damage.
B To re-connect essential equipment after a black out.
> C To disconnect non-essential equipment in case of generator overload.
D To trip a generator if the load becomes too large.
No. 183 What is the purpose of an instrument transformer installed on
the generator main bus-bars?
A To measure the generator output voltage
> B To measure the generator output current
C To measure the temperature of the bus-bar
No. 184 What will happen if the connections between an ammeter and
an instrument transformer located on the generator main bus-bars are disconnected ?
A The ammeter will go to zero.
B The ammeter will go to maximum.
> C The ammeter will read zero and the instrument transformer will
quickly become over heated.
D Nothing will happen.
No. 185 What does the symbol in the diagram show? NPN.bmp
A A PNP transistor.
B A thyristor.
> C A NPN transistor.
D A double pole transistor.
No. 186 What does the symbol in the diagram show?
A A zener diode
B A thyristor
C A bridge rectifier
No. 187 What does the symbol in the diagram show?
A A zener transistor.
B A rectification diode.
> C A zener diode.
D A regulating diode.
No. 188 What can the component showed in the picture be used for?
A As a frequency stabiliser.
> B As a voltage stabiliser.
C As a temperature stabiliser.
D As a light emitter.
No. 189 What does the symbol show?
A A light absorber.
> B A light emitting diode.
C A heat absorber.
No. 190 What does the symbol in the diagram show?
A A circuit that is connected to a DC source.
B A circuit that is not allowed to be earthed.
> C A circuit that is connected to earth.
D A circuit that is connected to earth if a short circuit occurs.
No. 191 What does the symbol in the picture show?
AA capacitor
C An AC power supply
D A switch
No. 192 What does this symbol show?
A An OR gate.
B A NOR gate.
C A NAND gate.
No. 193 What does the symbol in the picture show?
> A An OR gate.
B A NOR gate.
C A NAND gate.
D An AND gate.
No. 194 What does the symbol in the picture show?
A A double amplifier.
> B A latch.
C A lock amplifier.
D A latch rectifier.
No. 195 What is the total resistance of the three resistors shown in the
diagram?
A 150 Ohm
B 250 Ohm
> C 300 Ohm
No. 196 What will the total resistance of the four resistors shown in the diagram? A 200 Ohm B 250 Ohm > C 300 Ohm D 400 Ohm
No. 197 Calculate the current "I" in the diagram?
> A 100 mA.
B 0.01mA.
C 1.0 A.
D 0.01 A.
No. 198 What is the total resistance of the two resistors shown in the
diagram?
A 400
B 300
C 200
No. 199 What resistance does RS have to be for the combined
resistance of the circuit to be 50 Ohm?
A 100 Ohm
B 200 Ohm
C 20 Ohm
> D 50 Ohm
No. 200 What is the function of the circuit shown in the diagram?
> A A full wave rectifier.
B A half wave rectifier.
C A zero point meter.
D A transformer balance adjuster.
No. 201 From the sample diagrams shown, choose the correct voltage
waveform measured across the load.
A 1
> B 2
C 3
No. 202 What is the symbol in the picture show?
A A NPN diode.
B A PNP diode.
> C A PNP transistor.
D A NPN transistor.
No. 203 Which of the following four materials is the best electrical
conductor ?
A Copper.
B Brass.
> C Silver.
D Steel.
No. 204 An electrical heater is marked 220 V, 4400 W. What is the
resistance of the heater?
A 220 Ohm
> B 11 Ohm
C 22 Ohm
No. 205 Two electrical heaters both marked 220 Volt and 2200 W are
connected in series to a 220 Volt supply with a 10 A fuse. What will happen?
A The fuse will blow.
B The heaters will produce twice their normal heat output.
> C The heaters will produce half of their normal heat output.
D The heaters will be damaged as the voltage is different from their marked voltage.
No. 206 When is it necessary to take into the consideration the
internal resistance of a multi-meter?
> A When the resistance in the circuit to be measured is very high.
B When the resistance in the circuit to be measured is very low.
C When the frequency of the circuit become very high.
D It is not necessary to consider multi-meter resistance.
No. 207 Which of the following components can be used as an voltage stabiliser?
A A coil.
B A PNP transistor.
> C A zener diode.
No. 208 In the diagram, if E is set to 15 Volt, Uz will be 12 Volt. What circ07.bmp
will Uz become if E is increased to 20 Volt?
A 17 Volt
B 16 Volt
> C 12 Volt
D 20 Volt
No. 209 What is the circuit shown here used for?
A As an amplifier.
B As an rectifier.
> C As a voltage regulator.
D To measure a DC current.
No. 210 Choose the correct Boolean equation for the circuit shown.
> A E = ((A*B) + (C*D)) B E = ((A+B) + (C*D))
C E = ((A+B) * (C+D))
No. 211 Choose the correct Boolean equation for the circuit shown.
A E =((A+B) * (C+D))
> B E =((A*B) * (C*D))
C E =((A+B) + (C+D))
D E =((A*B) * (C+D))
No. 212 What is component X called ?
A A converter.
B An integrator.
> C An invertor.
D A rectifier.
No. 213 What does the symbol in the diagram show?
A The windings of a three pole DC shunt motor.
> B The windings of a three phase AC " Y " connected motor with
earthed neutral.
C The windings of a three pool DC " Y " connected motor.
No. 214 What does this symbol show ?
> A A three phase "Delta" connected motor.
B A three phase DC connected motor.
C A three phase " Y " connected motor.
D A three phase compound AC motor.
No. 215 What is the purpose of the circuit shown in the diagram ?
A To light the lamp when the coil is de-activated.
> B To operate the relay coil A with buttons 1 and 2.
C To prevent relay coil A becoming over-heated.
D To change direction of the motor connected to coil A.
No. 216 Choose the correct Boolean expression for the output at D.
> A D = A+ B + C B D = A + (B * C)
C D = A * B * C
No. 217 Which formula gives the correct Boolean expression for the component shown? A 1 B 2 C 3 > D 4
No. 218 Which option gives the correct output for the gate shown?
A 1
B 2
C 3
> D 4
No. 219 Which option gives the correct output for the gate shown?
A 1
B 2
C 3
No. 220 Which option gives the correct output at A ?
A 0 minus 1
B 0
C 0 times 0
> D 1
No. 221 What will happen when switch D is closed?
A Relay A will activate.
> B Lamp E will de-activate.
C Relay B will de-activate.
D Lamp E will activate.
No. 222 What conditions are needed for relay A to be activated ?
A Relay B activated and switch F closed.
> B B de-activated and switch F and G closed.
C Switch G open and relay B activated.
No. 223 How can lamp E be turned on?
A By closing switch D.
B By closing switch C.
C By closing switch D and switch F at the same time.
> D Lamp E cannot be turned on.
No. 224 How will coil C be activated ?
A When both D and E are closed.
B When D, E and F are closed.
C When E and A are closed.
> D When A and B are closed and either D or E are closed.
No. 225 When will coil C be activated ?
A When E is closed and D is open.
> B When E is closed and relay F activated.
C When relay F is activated.
No. 226 What does the symbol "A" represent?
A A differential amplifier.
> B An operational amplifier.
C A summing amplifier.
D A flip-flop amplifier.
No. 227 What is the function of the circuit shown here?
A A digital summarizer.
B A summing operational amplifier.
> C An integrating operational amplifier.
D A differential amplifier.
No. 228 What is the purpose of the circuit shown here?
A To measure low frequent current.
> B To measure the resistance of RL.
C To measure voltage E.
No. 229 If the resistances RL and Rv are equal, what will be the voltage Vm? (Assume R1 = R2) A E divided by R1 + R2 B E = Vm C (R1*R2) + (RV*RL) > D Zero
No. 230 What does the symbol shown here represent ?
A An American standard NAND gate.
> B A European standard AND gate.
C A European standard NAND gate.
D An American standard NOR gate.
No. 231 What does the symbol shown here represent ?
A An American standard invertor.
B A European standard converter.
C An American standard NOR gate.
No. 232 What does this symbol represent ?
> A A European standard NOR gate.
B An American standard NAND gate.
C A European standard NAND gate.
D An American standard NOT gate.
No. 233 What does this symbol represent ?
A An American standard AND gate.
B A European standard AND gate.
C An American standard NOR gate.
> D A European standard NAND gate.
No. 234 What will be the output " A " in this circuit?
A 0
B 0 + 0
C 1 * 0
No. 235 What will be the output " A " in this circuit?
A 1
> B 0
C 1 + 1
D inverted
No. 236 The specific gravity of the cells in a lead acid battery for the
emergency generator is found to be 1.250. What action would you take?
A Top up with water.
B Refresh with the addition of new acid.
C Check the charging system and if possible increase the
charging rate.
> D No action is required.
No. 237 Complete the sentence. Ships normally use an AC insulated
neutral distribution system because....
A it limits fault current.
> B an earth failure on one phase will not cause protective devices
like fuses and circuit breakers to trip.
C it reduces cable size.
No. 238 What type of probe is most suitable to measure the main
engine exhaust temperature?
A A PT100 (Platinum wire resistance) probe.
B A T802 (Thermistor) probe.
> C A NiCr/NiAl -type K (Thermocouple) probe.
D A mercury thermometer probe.
No. 239 Why should an electronic digital meter be used to measure voltage in electronic circuits?
A Because it's easier to read.
B Because it's not affected by interference.
C Because the voltage for electronic circuits can only be sensed
by an electronic meter.
> D Because the input resistance of the meter is high enough not
to affect the circuit under test.
No. 240 What type of electrolyte is used in a nickel cadmium battery?
A Dilute sulphuric acid.
B Distilled water.
> C Potassium hydroxide solution.
No. 241 In the "Ward/Leonard" method of DC motor speed control, how
is the motor direction changed?
> A Reversal of generator polarity. B Reversal of motor field polarity.
C By reversal of the rotation of the generator
D By switching the motor armature connections
No. 242 A flat lead acid battery can be revived by...
> A Filling with dilute sulphuric acid and trickle charging. B Adding "battery restorer".
C Adding distilled water.
D Trickle charging.
No. 243 Sulphation in a lead acid battery occurs as a result of:
> A Lack of trickle charging. B Incomplete charging.
C Heavy discharging.
