Mod 17 Cat b1.1 & b2

MODULE 17 – PROPERLLER 

MODULE 17 – PROPERLLER 

The factor that determines the thrust produced by a propeller is The factor that determines the thrust produced by a propeller is  A.

 A. Blade piBlade pitchtch B.

B. AnAnlle oe of af attttacac!! ".

". BlBladade e ananllee

Question 2 Question 2 BM17.1(2)L2 BM17.1(2)L2

The anle bet#een relati$e airflo# and rotational $elocity is termed as The anle bet#een relati$e airflo# and rotational $elocity is termed as  A.

 A. Blade anBlade anlele B.

B. %e%elili& a& annlele ".

". AnAnle le of of atattactac!!

Question ' Question ' BM17.1(')L2 BM17.1(')L2

The force actin on the propeller that tends to turn the blade to a finer pitch is The force actin on the propeller that tends to turn the blade to a finer pitch is termed as

termed as  A.

 A. "entrifu"entrifual t#isal t#istin momenttin moment B.

B. AeroAerodyndynamic amic t#ist#istin tin momemomentnt ".

". ThThrusrust bent bendindin for forcece

Question  Question  BM17.1()L2 BM17.1()L2  As the fo

 As the for#ard $r#ard $elocity of elocity of the aircthe aircraft decrraft decreases teases the anle he anle of attac! of attac! of theof the propeller blades

propeller blades  A.

 A. decreasdecreaseses B.

B. inincrcreaeasesess ".

Question * BM17.1(*)L2

The distance that the aircraft mo$es for#ard in one re$olution of the propeller is called

 A. Blade pitch B. +ffecti$e pitch ". ,eometric pitch Question

-BM17.1(-)L2

hich of the follo#in factors determines the thrust produced by a propeller/  A. 0ensity of air 

B. olume of air  ". ressure of air Question 7

BM17.1(7)L2

The thic! rounded portion of the propeller blade near the hub that is desined to i$e strenth to the blade is called

 A. blade 3oot B. blade Butt ". blade 4han! Question 5 BM17.1(5)L2

 At #hat anle of attac! #ill a propeller blade possibly stall/  A. Belo# 1* derees

B. Abo$e 1* derees ". Abo$e 15 derees

Question 6 BM17.1(6)L2

hich 8+ of the follo#in forces actin on the propeller blades tends to bend them for#ard/

 A. Tor9ue Bendin B. Thrust Bendin ". "entrifual Question 1: BM17.1(1:)L2

hat #ill happen to the anle of attac! #hen the anle of ad$ance increases #ith increasin airspeed/

 A. ;t decreases B. ;t increases

7.2 Propeller Construction LEVEL 2

Question 1 BM17.2(1)L2

The type of propeller that has the ability to chane the pitch of its blades durin fliht and on the round is

 A. <i&ed propeller 

B. Ad=ustable itch ropeller  ". ariable itch ropeller  Question 2

BM17.2(2)L2

hile installin the propeller on to the flane shaft ho# should the bolts be tihtened/

 A. ;n the direction of rotation (cloc!#ise)

B. ;n the direction opposite to rotation (anti>cloc!#ise) ". By usin an alternatin tor9ue se9uence

Question ' BM17.2(')L2

<rom #hich part of the blade is metal remo$ed durin hori?ontal balancin of an  Aluminium propeller blade/

 A. The tip of the blade B. The boss of the blade

". The leadin ede of the blade Question 

BM17.2()L2

The part of a composite propeller that absorbs the centrifual force and the bendin load is called

 A. Blade spar  B. Blade root ". Blade shan!

Question * BM17.2(*)L2

The document that should al#ays be referred to for correct procedures of repairin ropellers is

 A. +nine maintenance manual B. Aircraft structural manual ". Airframe maintenance manual Question

-BM17.2(-)L2

0urin $ertical balancin of an aluminium propeller blade for ad=ustment metal is remo$ed from

 A. the face of the blade B. the tip of the blade

". the leadin and trailin edes of the blade Question 7

BM17.2(7)L2

;n order to find the limitations for repair on propellers reference should be made to

 A. the 4tructural 3epair Manual

B. the +nine or ropeller Maintenance Manual ". the Aircraft @ndercarriae Maintenance Manual Question 5

BM17.2(5)L2

The ariable itch ropeller is able to chane the pitch of its blades  A. in fliht only

B. on round only #hen the enine is shut off  ". in fliht and on round

Question 6 BM17.2(6)L2

The cle$is pin must be positioned to#ards the centre of the shaft to loc! the propeller retainin nut onto the propeller shaft so that

 A. the centrifual force holds the pin in the hole B. the cle$is pin does not drop out of the hole ". the cle$is pin can be easily fitted

Question 1: BM17.2(1:)L2

hich de$ice is used to centre the hub on the propeller shaft durin propeller installation onto the propeller shaft/

 A. "ones B. Bearins ". 4nap rins

7. Propeller Pitc! Control LEVEL 2

Question 1 BM17.'(1)L2

;n a turbo>prop aircraft the po#er control le$er is connected to the  A. <uel "ontrol @nit and ropeller "ontrol @nit ("@)

B. <uel "ontrol @nit and itch "ontrol Mechanism ("M) ". +nine <uel ump and ropeller "ontrol @nit ("@) Question 2

BM17.'(2)L2

hich of the follo#in components of the propeller control unit ("@) control the oil supply to the pitch chane mechanism/

 A. 4prin and o$ernor $al$e

B. 4prin and o$ernor #eihts (fly#eihts)

". ,o$ernor #eihts (fly#eihts) and o$ernor $al$e Question '

BM17.'(')L2

hich pump is used to un>feather the propeller blades after an in>fliht +nine shut>do#n (and the propeller blades are in feather position)/

 A. %ydraulic pump B. neumatic pump ". +lectrical pump Question 

BM17.'()L2

0urin an o$er>speed condition of a double>actin propeller the o$ernor $al$e supplies oil to the front of the pitch chane cylinder for 

 A. increasin the blade anle in order to maintain the selected enine speed B. decreasin the blade anle in order to maintain selected enine speed ". ensurin that the blade anle remains the same so as to maintain the

Question * BM17.'(*)L2

To reduce the load durin start>up of turbo>prop enines #hich position of the propeller blades is selected/

 A. <liht fine pitch position B. ,round coarse pitch position ". ,round fine pitch position Question

-BM17.'(-)L2

rior to selectin the propeller to feather position the enine must be  A. shut do#n first

B. in the round idle position ". in the fliht idle position Question 7

BM17.'(7)L2

;n a turbo propeller enine the fuel control unit and the propeller control unit ("@) are connected to/

 A. The "ondition Le$er  B. The <uel 4hut off le$er  ". The o#er "ontrol Le$er Question 5

BM17.'(5)L2

hich component of the propeller system directly chanes the blade anle (pitch) of the propeller to maintain selected enine speed/

 A. The ropeller "ontrol @nit ("@) B. The itch "hane Mechanism ("M) ". The "onstant 4peed @nit ("4@)

Question 6 BM17.'(6)L2

hen the ariable itch propeller is in an under>speed condition the blade anle #ill be turned to set

 A. coarse pitch for decreasin the speed of the propeller to the on speed condition

B. coarse pitch for increasin the speed of the propeller to the on speed condition

". fine pitch in order to increase the speed of the propeller to the on speed condition

Question 1: BM17.'(1:)L2

hy must the propeller blades be feathered #hen a turbo propeller enine shuts do#n in fliht/

 A. To reduce dra

B. To reduce enine speed

". To reduce the lenth of the landin roll Question 11

BM17.'(11)L2

hich of the follo#in pumps #ill boost the oil pressure for featherin the propeller blades #hile the enine shuts do#n/

 A. The +nine 0ri$en ump B. The +lectrically 0ri$en pump ". The neumatically 0ri$en ump Question 12

BM17.'(12)L2

hat could happen if the propeller oes to $ery fine pitch (round fine pitch ) durin fliht/

 A. The enine could lead to o$er>speedin and there could be e&cessi$e dra and a loss of thrust

B. The enine could lead to under>speedin and there could be e&cessi$e dra and an increase in thrust

". The enine could lead to under>speedin and there could be a decrease in dra and thrust

7." Propeller #$nc!ronisin% LEVEL 2

Question 1 BM17.(1)L2

ith the synchroni?er system 8 ilot ad=usts the master enine propeller 3M. The 3M of the sla$e enine #ill automatically be ad=usted to

 A. the same 3M as the master enine propeller  B. a hiher 3M than the master enine propeller  ". the same anular relationship to the master blades Question 2

BM17.(2)L2

hich propeller system controls the master blades in the anular relationship that produces minimum $ibration and noise/

 A. 4ynchroni?in B. 4ynchrophasin ". <eatherin

Question ' BM17.(')L2

hich component in the propeller synchroni?ation system dri$es the actuator motor to increase or decrease the 3M of the sla$e enine propeller/

 A. "ontrol bo& B. ump

". ,o$ernor  Question  BM17.()L2

The components of the ropeller ,o$ernor that enerate alternatin current are  A. rotatin manet and carbon brush

B. rotatin manet and manetic pic!up ". rotatin armature and slip rin

Question * BM17.(*)L2

<or reducin the $ibration due to multi>enine aircraft propellers not turnin at e&actly the same speed the system used is

 A. featherin system

B. synchrophasin system ". synchroni?in system

Question -BM17.(-)L2

;n the propeller synchroni?in system #hich component operates the enine fuel control and the propeller o$ernor to increase or decrease the 3M of the sla$e propeller/

 A. The Actuator  B. The "ontrol Bo& ". The ,o$ernor 

Question 7 BM17.(7)L2

;n the propeller 4ynchrophasin system the component !eyed to the master blade to produce a pulse #hen the master blade passes its reference position is  A. the 3otatin Manet and Manetic ic!up

B. the 3otatin Armature and 4lip 3in ". the ulse ,enerator 

Question 5 BM17.(5)L2

;n addition to minimi?in $ibration propeller synchrophasin system ser$es to minimi?e

 A. temperature B. noise

7.& Propeller 'ce Protection LEVEL 2

Question 1 BM17.*(1)L2

The most se$ere and danerous ice formation on the propeller blades is  A. %A3 ;"+

B. ,LA+ ;"+ ". 3;M+ ;"+

Question 2 BM17.*(2)L2

;n the propeller de>icin fluid system #hen the pump is selected to emerency the liht in the coc!pit that comes on is of the follo#in colour 

 A. reen B. yello# ". red

Question ' BM17.*(')L2

;n the propeller fluid de>icin system the de>icin fluid is fed to the follo#in part of the propeller blade

 A. Blade root end B. Blade tip end ". Leadin ede

Question  BM17.*()L2

hen the de>icin fluid pump is selected to emerency the fluid flo#s

 A. the same as it #ould #hen manually selected but operation is controlled by ice detectors

B. intermittently at a ratio of one period 8 to four periods <<

". at a hih flo# rate #ith pump runnin continuously to combat se$ere icin conditions

Question * BM17.*(*)L2

ne of the effects of ice formation on a propeller blade is

 A. the blade surfaces become rouh resultin in increased dra B. the #eiht of ice #ill decrease the loadin and upset stability ". the bladeCs section chanes resultin in increased thrust Question

-BM17.*(-)L2

The part of the propeller blade #here ice formation first ta!es place is  A. the BladeCs Leadin +de

B. the BladeCs 3oot +nd ". the BladeCs Butt or Base Question 7

BM17.*(7)L2

+lectrical current for the propeller de>icin system transfers from the enine to the rotatin propeller by

 A. 4lip 3ins and Brushes B. 4lip 3ins and "ables ". Brushes and "ables Question 5

BM17.*(5)L2

The colour of the coc!pit liht that indicates fluid de>icin pump runnin continuously for hih flo# rate durin se$ere icin conditions is

 A. reen B. yello# ". red

7.( Propeller Maintenance LEVEL 

Question 1 BM17.-(1)L'

Before carryin out #or! on the propellers you must ensure that  A. enine inition system is made safe

B. correct type of fire e&tinuisher is positioned near the aircraft ". aircraft par!in bra!e is 8

Question 2 BM17.-(2)L'

hat action should be ta!en by the enineer #hen cuts or oues are detected on the propeller blade/

 A. The blade has to be replaced #ith a ne# blade B. The blade has to be remo$ed for o$erhaul

". "uts or oues must be blended out and the damaed areas should be re> painted

Question ' BM17.-(')L'

hich of the follo#in de$ices is used to chec! for propeller shaft concentricity after the enine has recei$ed a shoc! load/

 A. A ernier "alliper 

B. A 0ial Test ;ndicator ( 0T; ) ". An ;nternal Micrometer  Question 

BM17.-()L'

hat action is to be ta!en #hen minor erosion or dents are found on the propeller blade/

 A. The blade is to be remo$ed and sent for o$erhaul immediately B. The blade is to be repaired immediately before the ne&t fliht

". The damae must be monitored until the propeller is remo$ed for o$erhaul and repair 

Question * BM17.-(*)L'

hat action must be ta!en #hen abrasions cuts nic!s or corrosion that may lead to crac!s are found on propeller blades/

 A. The blade is to be blended out and repainted immediately B. The blade is to be replaced #ith a ne# ser$iceable blade

". The blade is to be left as such until the ne&t o$erhaul is dueD then only can repairs be carried out

Question -BM17.-(-)L'

hat must be ensured before any #or! is carried out on the propeller/  A. That the aircraftCs par!in bra!es are on

B. That there should not be anyone smo!in near the aircraft ". That the propeller and enine inition systems are made safe Question 7

BM17.-(7)L'

The type of propeller unbalancin e&perienced #hen the thrust (or pull) of the blades is une9ual is/

 A. Aerodynamic B. 4tatic

". 0ynamic Question 5 BM17.-(5)L'

To chec! for propeller shaft concentricity use  A. the <eeler ,ae

B. the micrometer 

7.7 Propeller #tora%e and Preser)ation LEVEL 2

Question 1 BM17.7(1)L2

 After #hat period of time must the propeller mechanism be flushed #ith inhibitin oil and treated #ith lanolin if the enine does not run/

 A. ' months B. - months ". 6 months Question 2 BM17.7(2)L2

 After #hat period of time must the bearins be e&ercised #hen assembled propellers or preloaded blade assemblies are held in storae/

 A.

B.

".

BM17.7(')L2

ith #hat type of =elly are the bearins of a $ariable pitch propeller coated for storae after remo$al from aircraft and disassembly of the parts/

 A. Mineral Eelly B. etroleum Eelly ". 3oyal Eelly Question  BM17.7()L2

%o# should the loose rubber components of a propeller be stored/  A. ;n a dar! unstressed condition

B. ;n a dar! stressed condition ". ;n a briht unstressed condition