EASA PART 66 Mod 17 MCQ

abdelazize · 发表于 2013-9-9 18:07:17

M-17 -- PROPELLER
01 --------------------------------------------------------------------------------
1. Thrust and camber faces of a propeller should be blended out to
a) 5 times the depth of damage
b) 10 times to the depth of damage
c) 30 times to the depth of damage
2. Leading edges should be blended out to
a) 5 times the depth of damage
b) 10 times the depth of damage
c) 30 times the depth of damage
3. The shank of the propeller is permitted to have
a) minor repairs
b) no repairs
c) no decals fitted
4. Wooden propellers are permitted
a) no repairs
b) repairs using sawdust and aeroglue
c) repairs that do not affect weight and balance
5. Composite propellers may have minor repairs carried out by
a) the operator
b) any approved 3rd party maintenance organization
c) any approved composite repair facility
6. Details of propeller overhaul may be found in
a) Airworthiness Notice 75
b) the AMM
c) Airworthiness Notice 55
7. The tip clearance of a single engine tail wheel aircraft is measured with the aircraft
a) tail wheel on the ground
b) tail wheel in the take off position
c) in the rigging position
8. The tip clearance of a multi engine aircraft
a) is taken between the engines with the props aligned.
2
b) is taken between the prop and the fuselage
c) is taken from the ground
9. The tip clearance of a sea plane is
a) 9 inches
b) 1 inch
c) 18 inches
10. Cropping is permitted to a maximum of
a) ½ inch on one blade only
b) ½ inch on all blades
c) 1 inch on all blades
-----------------------------------------
01
ans[1] = "c";
ans[2] = "b";
ans[3] = "b";
ans[4] = "b";
ans[5] = "c";
ans[6] = "a";
ans[7] = "b";
ans[8] = "b";
ans[9] = "c";
ans[10] = "c";
explainAnswer[1]="Answer found in unattributed notes";
explainAnswer[2]="Answer found in unattributed notes";
explainAnswer[3]="Refer Jepperson A&amp Powerplant Page 12-55";
explainAnswer[4]="Jepperson A&P Powerplant page 12-53 refers";
explainAnswer[5]="Must be composite specialist organization";
explainAnswer[6]="Refer CAA Air Worthiness Notice 75";
explainAnswer[7]="Refer Jepperson Aircraft Propellers and controls Fig 2-5";
explainAnswer[8]="Refer Jepperson Aircraft Propellers and Controls Fig 2-5";
explainAnswer[9]="Jepperson Aircraft Propellers and Controls Fig 2-5";
explainAnswer[10]="If 1 blade is cropped all must be cropped equally";
3
-----------------------------------------
02 ======== no Answers
This is exam number 2. .
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1. Dynamic balance is confirmed by use of
a) knife edges and mandrel
b) a tracking check
c) a vibration analyser
2. Synchrophasing reduces vibration by the use of
a) pulse probes and a single synchrophase unit
b) tachometers and correction motors
c) coordinating the rpm of each engine
3. A metal propeller may be statically balanced by
a) removing metal from the opposite blade
b) adding varnish to the lighter blade
c) adding or removing lead wool to the hollow blade roots
4. When in the windmill position ATM
a) assists CTM
b) opposes CTM
c) is not related to CTM
5. A hydraulic pitch lock is utilised in a hydromatic propeller to
a) lock out the course pitch oil line in the event of underspeeding
b) prevent the propeller overspeeding in the event of oil supply failure
c) lock out the fine pitch oil line in the event of overspeeding
6. Electronic torque measuring systems utilise
a) stress gauges in the reduction gear
b) pressure transducers in the reduction gear
c) strain gauges in the reduction gear
7. A conventional turboprop torque meter uses
a) engine oil as the pressure medium
b) hydraulic oil as the pressure medium
c) coiled spring levers as the pressure medium
8. When in the beta range the propeller pitch is controlled
a) directly from the pitch change mechanism to the PCU
b) indirectly from the power lever
c) directly from the power lever
4
9. The advantage of the beta range is it allows
a) low fine pitch settings with high power
b) low power settings with higher than normal pitch setting for ground manoeuvres
c) high power settings with higher than normal pitch settings when in flight
10. Electrically de-iced propeller slip rings have regular resistance checks for
a) open circuit heating elements
b) wear between brushes and slip ring
c) oxidisation due to altitude
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ans[1] = "";
ans[2] = "";
ans[3] = "";
ans[4] = "";
ans[5] = "";
ans[6] = "";
ans[7] = "";
ans[8] = "";
ans[9] = "";
ans[10] = "";
explainAnswer[1]="";
explainAnswer[2]="";
explainAnswer[3]="";
explainAnswer[4]="";
explainAnswer[5]="";
explainAnswer[6]="";
explainAnswer[7]="";
explainAnswer[8]="";
explainAnswer[9]="";
explainAnswer[10]="";
5
This is exam number 3. .
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1. The optimum angle for a fixed pitch propeller is
a) 2 - 4 degrees
b) 6 - 10 degrees
c) 15 degrees
2. A left handed propeller is one that
a) rotates clockwise when viewed from the front
b) rotates clockwise when viewed from the rear
c) is fitted to an engine on the Left side of the aircraft
3. If the speeder spring pressure of a CSU is increased the blade will
a) fine off
b) coarsen off
c) will not move
4. Mechanical vibration relating to propellers in a piston powered aircraft
a) is due to the lead lag of the propeller compared to the engine
b) is due to the power stroke of the engine and may have a more detrimental effect than
aerodynamic vibration
c) is due to the crankshaft at intermittent power settings
5. Prop anti-icing may be achieved by
a) a using hot air from the compressor
b) using commercial de-icing fluid sprayed on the pro
c) using iso-propyl alcohol de-icing fluid sprayed on the blade
6. De-icing of the propeller can be monitored by
a) viewing the blade and observing ice falling off the blade
b) an ammeter in the flight deck
c) viewing the deicing fluid level sight glass
7. Metal at the tip and along the leading edge of a wooden propeller is
a) for protection
b) for Anti-icing
c) for balancing
8. Insulation testing of electrical de-icing systems should be periodically carried out
because of
a) oxidation due to atmospheric conditions
b) wear on the slip rings
c) an open circuit in one of the blades
6
9. Synchronising can only be achieved if the slave propeller is
a) a within 20 rpm of the master
b) within 100 rpm of the master
c) the same speed as the master
10. Synchronising is carried out to
a) match engine rpm
b) match prop tip speed
c) match blade phase angle difference
03
ans[1] = "a";
ans[2] = "b";
ans[3] = "a";
ans[4] = "b";
ans[5] = "c";
ans[6] = "b";
ans[7] = "a";
ans[8] = "c";
ans[9] = "b";
ans[10] = "a";
explainAnswer[1]="Jepperson A&P Powerplant Page 12-4 Refers";
explainAnswer[2]="Answer found in unatributable notes";
explainAnswer[3]="Jepperson Aircraft Propellers and Control pages 55-58";
explainAnswer[4]="Jepperson Aircraft Propellers and Control page 16 refers";
explainAnswer[5]="Jepperson Aircraft Propellers and Control page 124 refers";
explainAnswer[6]="Jepperson Aircraft Propellers and Control page 129 refers";
explainAnswer[7]="Jepperson Aircraft Propellers and Control page 18 refers";
explainAnswer[8]="CAIPs leaflet PL/1-4 refers";
explainAnswer[9]="Jepperson Aircraft Propellers and Control page 132 refers";
explainAnswer[10]="Jepperson Aircraft Propellers and Control page 132 refers";
*******************************
7
04For full explanations of all these questions, and for many more new and up-to-date
questions, with correct answers, full explanations, downloadable material and Tutorial
Support, please visit http://www.club66pro.co.uk/
This is exam number 4. .
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1. Forces acting on a propeller are
a) centrifugal, twisting, and bending
b) torsion, tension and thrust
c) torque Thrust and Centrifugal
2. Aerodynamic Correction Factor (ACF)
a) is indicated in the form of degrees and minutes of pitch
b) corrects for dynamic balance
c) corrects for static balance
3. The blade angle at the root is
a) greater than the tip
b) less than the tip
c) same from tip to root
4. A propeller with an adjustable blade can be adjusted
a) in flight
b) on the ground with the engine running
c) on the ground with the engine stationary
5. What force on a propeller blade turns the blades to a fine pitch?
a) Torque
b) ATM
c) CTM
6. When on the ground with the engine idling the prop control should be
a) fully forward with the mixture at idle
b) fully aft with the mixture at idle
c) fully aft with the mixture at rich
7. Operation with the engine at maximum boost should be limited to
a) prop at fine to prevent overstressing the engine
b) prop at course to prevent overstressing the engine
c) prop at windmill to prevent overstressing the engine
8. On an underspeed condition the blades are turned to
a) feather
b) coarse
8
c) fine
9. The synchronisation governor monitors
a) prop tip speeds
b) thrust tip speeds
c) RPM
10. The purpose of prop twist is
a) to maintain Angle of Attack at the same value along the blade.
b) to maintain Blade Angle along the blade
c) coarsen the blade angle at the root
ans[1] = "a";
ans[2] = "a";
ans[3] = "a";
ans[4] = "c";
ans[5] = "c";
ans[6] = "c";
ans[7] = "b";
ans[8] = "c";
ans[9] = "c";
ans[10] = "a";
explainAnswer[1]="Jepperson Powerplant Page 12-5 to 12-7 refers";
explainAnswer[2]="ACF adjusts individual blade pitch angle to compensate for
aerodynamic differences of blades in manufacture";
explainAnswer[3]="Jepperson Aircraft Propellers and Controls Page 13 Refers";
explainAnswer[4]="Jepperson Aircraft Propellers and Controls Page 37 refers";
explainAnswer[5]="Jepperson Aircraft Propellers and Controls Page 15 refers";
explainAnswer[6]="Jepperson Powerplant Page 2-16 refers- rich mixture cools the
cylinders";
explainAnswer[7]="Maximum Boost indicates maximum power is applied to the prop";
explainAnswer[8]="Jepperson Aircraft Propellers and Controls Page 55-58 refers";
explainAnswer[9]="Jepperson Aircraft Propellers and Controls Page 37 refers";
explainAnswer[10]="Jepperson Aircraft Propellers and Controls Page 13 Refers";
9
**********************
05
This is exam number 5. .
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1. Synchronisation is used to
a) preset the phase angle of propellers
b) reduce vibration and noise
c) reduce the pitch of the fastest running blade
2. In a hydromatic propeller with counterweights what is used to make the propeller
move to fine pitch
a) ATM
b) centrifugal force acting on the counterweight
c) engine oil
3. The forces acting on a propeller blade are
a) thrust and torque
b) bending twisting and centrifugal
c) thrust aerodynamic and tension
4. Damage to a leading edge can be blended in comparison to a blade face
a) by maintaining a smooth depression
b) by not exceeding 25% of the chord
c) at a steeper angle
5. The longitudinal clearance between the nose wheel and the propeller on a tricycle
geared propeller is
a) 18 inches
b) 9 inches
c) 1/2 inch
6. Relaxing tension on the governor spring will result in the blade coarsening and
a) RPM increasing manifold pressure increasing
b) manifold pressure constant, RPM decreasing
c) RPM decreasing , manifold pressure increasing
7. A tracking check compares
10
a) 2 Opposite blades
b) 2 Adjacent blades
c) any 2 blades
8. Blade cuffs are fitted to the root of the blades
a) to increase thrust
b) to increase the strength of the blade
c) to increase flow of cooling air into the engine nacelle.
9. The ground fine pitch stop is
a) removed on the ground
b) never removed
c) removed during flight
10. Low torque sensing is used to
a) increase power
b) increase pitch
c) initiate auto-feather
ans[1] = "b";
ans[2] = "c";
ans[3] = "b";
ans[4] = "c";
ans[5] = "c";
ans[6] = "c";
ans[7] = "c";
ans[8] = "c";
ans[9] = "a";
ans[10] = "c";
explainAnswer[1]="Refer Jepperson Aircraft Propellers and Controls Page131";
explainAnswer[2]="Refer Jepperson Aircraft Propellers and Controls Pages 55- 58";
explainAnswer[3]="Refer Jepperson Powerplant Page 12- 5 to 7";
explainAnswer[4]="10:1 compared to 30:1";
explainAnswer[5]="Refer Jepperson Aircraft Propellers and Controls Fig 2-5";
explainAnswer[6]="Refer Jepperson Aircraft Propellers and Controls Page 32";
explainAnswer[7]="Refer Jepperson Aircraft Propellers and Controls Page 32";
explainAnswer[8]="Refer Jepperson Powerplant Page 12- 3";
explainAnswer[9]="Refer Jepperson Aircraft Propellers and Controls Page 32 Low pitch
stop is an alternative name on some applications";
explainAnswer[10]="Refer Jepperson Aircraft Propellers and Controls Page 135";
11
06 ***********************
This is exam number 6. .
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1. A line of indentations at one blade section can be
a) declared unserviceable
b) left for up to 12 months
c) blended within limits
2. On an electrical de-icing system first cycle is used
a) at Low Air Temperature
b) at high Air Temperature
c) on the Ground
3. Blade angle at the root is
a) low
b) high
c) the master blade angle
4. If governor fly wheel overcomes the speeder spring, it indicates
a) overspeed
b) underspeed
c) onspeed
5. Blade angle is taken from the chord and
a) relative airflow
b) propeller shaft
c) plane of rotation
6. Synchronisation is used
a) in flight
b) in flight except landing and take off
c) on the ground
7. Pitch control using torque measuring is for
a) increasing drag
12
b) reducing drag in engine failure
c) reducing drag in binding
8. If force is applied to the speeder spring, what will happen
a) blade angle coarsen
b) blade angle finer
c) blade angle is frozen in last known position
9. Propeller vibration due to a problem with propeller installations would have a
vibrating frequency of
a) higher frequency than turbine vibration
b) the same frequency as turbine vibration
c) lower frequency than turbine vibration
10. Insulation checks on propeller electrical heating elements should be carried out
frequently due to
a) short/open circuits in the heating system wires along the propeller blade
b) oxidation of slip ring and brush gear assembly
c) deposits formed due to the wear of slip ring and brush gear assembly
ans[1] = "a";
ans[2] = "a";
ans[3] = "b";
ans[4] = "a";
ans[5] = "c";
ans[6] = "b";
ans[7] = "b";
ans[8] = "b";
ans[9] = "c";
ans[10] = "a";
explainAnswer[1]="Jepperson Aircraft Propellers and Control Page 126 Refer";
explainAnswer[2]="Jepperson Powerplant Fig 12-8 refers";
explainAnswer[3]="Jepperson Aircraft Propellers and Control Pages 55-58 Refer";
explainAnswer[4]="Jepperson Powerplant Page 12-4 refers";
explainAnswer[5]="Jepperson Aircraft Propellers and Control Page132 refer";
explainAnswer[6]="Jepperson Aircraft Propellers and Control Page136 refer to Auto
Feather systems";
explainAnswer[7]="Jepperson Aircraft Propellers and Control Pages 55-58 Refer";
explainAnswer[8]="This will make the flyweights move inwards, thus fooling the CSU
to think it is underspeeding and fine off the pitch to increase the RPM.";
explainAnswer[9]="Propeller RPM is always less than Gas Turbine RPM therefore
vibration frequency will always be less";
explainAnswer[10]="Old CAIP's Leaflet PL/1-4 Para 3.3-2 Refers";
13
**********************
This is exam number 7. .
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1. Preloading propeller blades before installation prevents
a) blade flutter
b) aerodynamic imbalance on the blades
c) blade distortion
2. When is superfine pitch used?
a) In cruise
b) Landing and takeoff
c) Engine starting to reduce propeller torque loading on starter motor
3. When unfeathering a propeller, the blade should be put into what position to stop
propeller overspeed?
a) Coarse pitch
b) Fine pitch
c) Negative pitch
4. Blade angle is measured using a
a) bevel protractor
b) propeller protractor
c) clinometer
5. What forces act on a propeller blade?
a) Thrust and torque
b) Bending, centrifugal CTM and ATM
c) Bending, thrust, torque
6. When the fly weights fly outwards in a PCU, this is known as
a) on speed
b) under speed
c) overspeed
7. In an ‘on speed’ condition, oil in the tube
14
For full explanations of all these questions, and for many more new and up-to-date
questions, with correct answers, full explanations, downloadable material and Tutorial
Support, please visit http://www.club66pro.co.uk/
a) flows out of the tubes
b) flows in the tubes
c) remains constant
8. Where is the de-icing boot?
a) Root
b) Tip
c) Trailing edge
9. On a reversing prop moving to the max reversing angle, the prop goes
a) from fine pitch through plane of rotation, fine reverse then course reverse
b) from fine pitch through plane of rotation, course reverse then fine reverse
c) from course pitch through plane of rotation course,fine reverse then course
reverse
10. In the Beta range, when angle of attack increases the fuel flow increase, and what
else?
a) RPM and EGT
b) EPR and fuel temperature
c) Fuel temp
ans[1] = "a";
ans[2] = "c";
ans[3] = "a";
ans[4] = "b";
ans[5] = "b";
ans[6] = "c";
ans[7] = "c";
ans[8] = "a";
ans[9] = "a";
ans[10] = "a";
explainAnswer[1]="Old Caip's Leaflet PL/1-1 refers to Ground fine pitch; believed to be
an alternative to Superfine Pitch";
explainAnswer[2]="A Prop moved to coarse pitch will rotate the engine without
overspeeding";
explainAnswer[3]="Refer Jepperson Aircraft Propellers and Controls Fig 1-7";
explainAnswer[4]="Refer Jepperson Aircraft Propellers and Controls pages 14-15.Note
Thrust and Torque are both bending forces</font>";
explainAnswer[5]="Refer Jepperson Aircraft Propellers and Controls Page 14-15";
15
explainAnswer[6]="Refer Jepperson Aircraft Propellers and Controls Page 55-58";
explainAnswer[7]="Refer Jepperson Aircraft Propellers and Controls Page 55-58";
explainAnswer[8]="Refer Jepperson Aircraft Propellers and Controls Pages 126-127";
explainAnswer[9]="Fine reverse must come before coarse reverse";
explainAnswer[10]="If fuel flow increases then RPM and EGT of the Gas Generator
must increase";
*******************
This is exam number 8. .
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1. CTM will
a) turn the blade about the lateral axis
b) try to bend the blade away from the engine
c) cause the tips to rotate at supersonic speeds
2. With a propeller defect, will the frequency be
a) higher than a turbine defect
b) higher than a auxiliary gearbox defect
c) lower than a turbine defect
3. Torque sensing is used to
a) reduce drag
b) reduce drag following engine shutdown
c) synchronise blade angles
4. If pressure is increased on the speeder springs, rpm increase. What happens to the
blade angle?
a) Increases
b) Decreases
c) Remains unchanged
5. From reverse pitch, to return to normal pitch it
a) passes through fine
b) passes through coarse
c) passes through coarse then fine
6. In a prop with counterweights, what is used to make it move to fine pitch?
a) ATM’s
b) Centrifugal force acting on the counterweight
c) Governor oil pressure
16
7. If a propeller is in fine pitch and then moves to feather it will pass through
a) reverse
b) flight fine only
c) coarse
8. When in reverse pitch, CTM will tend to move the propeller blades towards
a) a negative pitch
b) a positive pitch
c) a position depending on rpm
9. If the blade angle is increased
a) the pitch becomes finer.
b) the pitch becomes coarser
c) lateral stability decreases.
10. A “double” acting propeller has
a) oil pressure on one side of piston
b) oil pressure on two sides of piston
c) nitrogen or air on one side of piston
ans[1] = "a";
ans[2] = "c";
ans[3] = "b";
ans[4] = "b";
ans[5] = "a";
ans[6] = "c";
ans[7] = "c";
ans[8] = "b";
ans[9] = "b";
ans[10] = "b";
explainAnswer[1]="Jepperson Aircraft Propellers and Controls page Page 15 refers";
explainAnswer[2]="Propeller vibration is always lower then turbine vibration";
explainAnswer[3]="Jepperson Aircraft Propellers and Controls page 135 Refers";
explainAnswer[4]="Jepperson Aircraft Propellers and Controls pages 55-58 Refers";
explainAnswer[5]="";
explainAnswer[6]="Jepperson Aircraft Propellers and Controls page 81refers";
explainAnswer[7]="Jepperson Aircraft Propellers and Controls Fig 11.1 refers";
explainAnswer[8]="CTM always rotates towards the plane of rotation";
explainAnswer[9]="Pitch is an alternative name for blade angle";
explainAnswer[10]="Jepperson Aircraft Propellers and Controls Fig 11-32 refers";
17
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This is exam number 9. .
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1. During normal propeller operation, oil pressure for the governor is provided by
a) the engine driven pump
b) a variable volume pump
c) a pump in the governor
2. Oil for an ‘on speed’ condition passes through
a) the coarse pitch line
b) the fine pitch line
c) neither of the lines
3. If the spur gear pump in a single acting propeller governor failed, the
a) blades would turn to a coarse pitch
b) blades would rotate to a fine pitch
c) blades would move to the feather position
4. The hydromatic variable pitch propeller is operated on the principle of
a) oil pressure moving a piston
b) an electrical motor moving a gear segment
c) a venturi or “u” tube with mercury
5. Blending of propeller blade defects refers to the
a) repainting of blade tips after cropping
b) matching of paint finishes for appearances
c) conversion of rough or sharp edges into smooth depressions
6. Removal of material from the propeller blade tips, resulting in a reduction in
propeller diameter is called
a) tipping
b) topping
c) cropping
18
7. The minimum percentage seating on a propeller rear cone should be
a) 95%
b) 90%
c) 70%
8. As a propeller blade moves through the air, forces are produced, which are known as
a) lift and drag
b) lift and torque
c) thrust and torque
a) small mass of air at high velocity
b) large mass of air at low velocity
c) small mass of air at low velocity
10. Propeller efficiency
a) the ratio of the useful work done by the propeller to work done by the engine on
the propeller
b) the ratio of the work applied to the geometric pitch to useful work on the C.S.U.
c) ratio of output speed to input propeller speed
ans[1] = "c";
ans[2] = "c";
ans[3] = "a";
ans[4] = "a";
ans[5] = "c";
ans[6] = "c";
ans[7] = "c";
ans[8] = "c";
ans[9] = "b";
ans[10] = "a";
explainAnswer[1]="Jepperson Aircraft Propellers and Controls refer. Allgovernors have
a built in pump";
explainAnswer[2]="Jepperson Aircraft Propellers and Controls Pages 55-58 refer";
explainAnswer[3]="Jepperson Aircraft Propellers and Controls Page 62";
explainAnswer[4]="Jepperson Aircraft Propellers and Controls Page 85";
explainAnswer[5]="Jepperson Aircraft Propellers and Controls Page 21.Blending is the
smoothing of a defect";
explainAnswer[6]="";
19
explainAnswer[7]="Jepperson Aircraft Propellers and Controls Page 31";
explainAnswer[8]="Jepperson A & P Powerplant Page 12-6";
explainAnswer[9]="Kermode Mechanics of Flight Fig 4.4 refers";
explainAnswer[10]="Kermode Mechanics of Flight Page 134 Refers";
*****************
This is exam number 10. .
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1. Geometric Pitch is the distance moved
a) in one revolution without slip
b) in one revolution when slip is maximum
c) in one revolution
2. As propeller rotation speed increases the centrifugal turning moment on the blades
will
a) remain constant through r.p.m. range
b) increase
c) decrease
3. Propeller torque is the resistance offered by the propeller to
a) changing pitch
b) rotation
c) feathering
4. The angle between the resultant airflow direction and the propeller blade plane of
rotation is known as
a) angle of attack
b) helix angle or angle of advance
c) blade angle
5. Which type of turbo-propeller engine is practically free from surge and requires low
power for starting
a) directly coupled
b) one using a centrifugal compressor.
c) twin spool free turbine
6. The propeller is “feathered” when the blades are at
a) 90o to plane of rotation.
b) 0o to plane of rotation
20
c) 20o to plane of rotation
7. The constant speed unit (C.S.U.) governor works on the principle of
a) manual selection through a gearbox
b) centrifugal twisting moments
c) spring pressure acting against centrifugal force
8. At constant rpm, advance per revolution depends on
a) the angle of advance
b) forward speed
c) SHP
9. Aerodynamic Twisting Moment
a) turns the blades to high pitch
b) turns the blade to low pitch
c) turns the blade to windmill
10. The thrust of a propeller is normally taken by the
a) propeller rear cone
b) torque meter
c) front bearing in the reduction gear
ans[1] = "a";
ans[2] = "b";
ans[3] = "b";
ans[4] = "c";
ans[5] = "c";
ans[6] = "a";
ans[7] = "c";
ans[8] = "b";
ans[9] = "a";
ans[10] = "c";
explainAnswer[1]="Jepperson Aircraft Propellers and Controls page 15. CTM increases
as a function of Centrifugal Force";
explainAnswer[2]="Jepperson Aircraft Propellers and Controls page 15 refers";
explainAnswer[3]="Jepperson A&P Powerplant Page 12-4 refers";
explainAnswer[4]="Twin spool is more surge resistant and free turbine allows for easy
starting";
explainAnswer[5]="Jepperson Aircraft Propellers and Controls page 75 refers";
explainAnswer[6]="Jepperson Aircraft Propellers and Controls page 55-58 refers";
explainAnswer[7]="Jepperson A&P Powerplant Page 12-7/8 refers";
explainAnswer[8]="Jepperson A&P Powerplant Fig 12-12 refers";
explainAnswer[9]="Jepperson A&P Powerplant Page 1-30/1-31 refers";
21
explainAnswer[10]="Jepperson A&P Powerplant Page 1-30/1-31 refers";
**************************
This is exam number 11. .
--------------------------------------------------------------------------------
1. Under normal operation the point of maximum stress on a propeller blade is at the
a) root
b) tip
c) master station
2. On which type of turbo-propeller would you expect to find a parking brake
a) compounded twin spool
b) free turbine
c) direct coupled twin spool
3. Propeller blade angle
a) increases from root to tip
b) decreases from root to tip
c) is constant along the blade length
4. The purpose of the pitch change cams is to
a) convert linear motion to rotary motion.
b) convert rotary motion to linear motion.
c) prevent windmilling
5. What does the torque meter reading indicate in a gas turbine engine?
a) Torque reaction at the reduction gear
b) Engine torque
c) The ratio between engine thrust and engine torque
6. The gear type pump in a C.S.U. or P.C.U
a) lubricates the entire propeller system
b) boosts engine oil system pressure
c) assist the governor valve to move
22
7. The gear segments on the blade roots of a hydromatic propeller mesh with the
a) stationary cam
b) torque tubes and eye bolts
c) moving cam
8. Coarse pitch is used for
a) take off and climb
b) maximum economical cruise in level flight
c) landing and power checks
9. A propeller is centralised on the propeller shaft by
a) the front git seal
b) the rear pre-load shims
c) the front and rear cones
10. Reduction gearing allows the
a) blade tips to operate above the speed of sound
b) blade tips to rotate slower than the root of the propeller blade
c) blade tips to operate below the speed of sound
ans[1] = "a";
ans[2] = "b";
ans[3] = "b";
ans[4] = "a";
ans[5] = "a";
ans[6] = "b";
ans[7] = "c";
ans[8] = "b";
ans[9] = "c";
ans[10] = "c";
explainAnswer[1]="The parking brake stops the propeller rotating when the engine is
stopped";
explainAnswer[2]="Jepperson A&P Powerplant Fig 12-8 refers";
explainAnswer[3]="Jepperson Aircraft Propellers and Controls Fig 11-33 refers";
explainAnswer[4]="Jepperson Aircraft Gas Turbine Powerplants Fig 12-14 refers";
explainAnswer[5]="Jepperson Aircraft Propellers and Controls Page 55 refers";
explainAnswer[6]="Jepperson Aircraft Propellers and Controls Fig 11-33 refers";
explainAnswer[7]="Jepperson A&P Powerplant Page 12-16 refers";
explainAnswer[8]="Jepperson Aircraft Propellers and Controls page 30 refers";
explainAnswer[9]="Front and rear cones - Jepperson Aircraft Propellers and Controls";
23
explainAnswer[10]="Propellers always operate slower than the engine to ensure the
blade tips do not go sonic";
******************
This is exam number 12. .
--------------------------------------------------------------------------------
1. Effective pitch is
a) geometric pitch minus slip
b) distance moved in one revolution
c) pitch measured at the master station
2. Prior to using the universal propeller protractor
a) check date stamp for serviceability
b) determine the reference blade station
c) ensure the propeller blade is at the horizontal
3. A windmilling Propeller has
a) a small positive blade angle
b) a small positive angle of attack
c) a small negative angle of attack
4. To fit a new front cone to a prop shaft firstly
a) coat in Engineers blue to ensure seating in the propeller front boss
b) etch the propeller serial number to the rear face
c) cut in half with a hacksaw and etch a unique serial number to both halves
5. When fitting a propeller to a tapered shaft
a) locate the master spline
b) ensure fully seated
c) ensure the master spline and blade alignment are in accordance with the MM
6. Blade tracking is adjusted by
a) reseating the propeller on the front and rear cones
b) adding lead wool tothe blade shank
c) by fitting shims to the propeller shaft hub
7. What are the purpose of small holes at the tip of wooden propellers?
a) Balancing
b) Pivot points used during manufacture
24
c) Drainage
8. The thrust face of a propeller blade is the
a) rear face or flat side
b) front face or curved side
c) root to which the gear segment is fitted
9. How is anti icing fluid fed to the individual blades?
a) Pump to each blade rubber feed boot
b) Pump to a slinger ring
c) Under gravity to the slinger ring then on to the blade
10. Ice is removed from blades by
a) inboard and outboard boot sections heated in sequence by action of the timer
b) a continuously heated electrical boot
c) rubber boots inflated in sequence using compressor hot air
ans[1] = "a";
ans[2] = "b";
ans[3] = "a";
ans[4] = "c";
ans[5] = "c";
ans[6] = "c";
ans[7] = "c";
ans[8] = "a";
ans[9] = "b";
ans[10] = "a";
explainAnswer[1]="Actual pitch after losses";
explainAnswer[2]="Jepperson Aircraft Propellers and Controls Page 3 refers";
explainAnswer[3]="Less than 2 degrees";
explainAnswer[4]="Jepperson Aircraft Propellers and Controls Page 30 refers";
explainAnswer[5]="Jepperson Aircraft Propellers and Controls Page 30 refers";
explainAnswer[6]="Jepperson Aircraft Propellers and Controls Page 33 refers";
explainAnswer[7]="Jepperson Aircraft Propellers and Controls Page 143 refers";
explainAnswer[8]="Jepperson A&P Powerplant Fig 12-16 Refers";
explainAnswer[9]="Jepperson Aircraft Propellers and Controls Page 124 refers";
explainAnswer[10]="Jepperson Aircraft Propellers and Controls Page 126 refers";
25
For full explanations of all these questions, and for many more new and up-to-date
questions, with correct answers, full explanations, downloadable material and Tutorial
Support, please visit http://www.club66pro.co.uk/
******************
This is exam number 13. .
--------------------------------------------------------------------------------
1. Solidity of a propeller can be increased by
a) increasing blade thickness
b) increasing blade angle
c) increasing blade chord
2. Windmilling causes
a) propeller underspeeding
b) maximum propeller drag
c) Centrifugal Twisting Moment
3. When an engine fails
a) the prop is feathered using the propeller governor pump
b) the prop is feathered using counterweights
c) the prop is feathered using an electrical feathering pump
4. The purpose of an accumulator in a double acting propeller system is to
a) provide back up to the governor pump
b) accelerate the unfeathering process
c) to port oil to the coarse pitch oil line to assist in feathering the propeller
5. Torque acts
a) in opposition to the direction of rotation
b) in the same direction as the plane of rotation
c) at right angles to the plane of rotation
6. The purpose of blade twist is to
a) reduce angle of attack at the blade root
b) to even out thrust distribution across the propeller
c) to ensure that tip speed does not go faster than Mach 1
26
7. A turbo-prop engine
a) uses a spur gear reduction system
b) uses an epicyclic reduction gear system
c) does not require a reduction gear system due to the propshaft being driven from
the low speed compressor
8. Total power of a tubo-prop engine is measured in
a) Brake Horsepower (BHP)
b) Shaft Horsepower (SHP)
c) Equivalent Shaft Horsepower (ESHP)
9. When storing wooden propellers
a) wrap in greaseproof paper
b) store in a horizontal position
c) store in a dry well ventilated and illuminated location
10. To conduct a power check of an internal combustion engine requires
a) coarse pitch setting and advance the throttle to the target RPM
b) fine pitch setting and advance the engine to the max RPM setting
c) fine pitch setting and advance the engine to the target RPM setting
ans[1] = "c";
ans[2] = "b";
ans[3] = "c";
ans[4] = "b";
ans[5] = "a";
ans[6] = "b";
ans[7] = "b";
ans[8] = "c";
ans[9] = "b";
ans[10] = "c";
explainAnswer[1]="AC Kermode Mechanics of Flight Page 138 refers";
explainAnswer[2]="Jepperson Aircraft Propellers and Controls Page 89";
explainAnswer[3]="Jepperson A&P Powerplant Page 12-30 refers";
explainAnswer[4]="Jepperson A&P Powerplant Page 12-26 refers";
explainAnswer[5]="Jepperson Aircraft Propellers and Controls Page 15 refers";
explainAnswer[6]="Jepperson Aircraft Propellers and Controls Page 14 refers";
explainAnswer[7]="All large engines use Epicyclic reduction gearing";
explainAnswer[8]="ESHP is SHP plus residual thrust";
explainAnswer[9]="Jepperson A&P Powerplant Page 12-54 refers";
explainAnswer[10]="Jepperson A&P Powerplant Page 2-16 refers";
27
*********************
This is exam number 14. .
--------------------------------------------------------------------------------
1. The disadvantage of using reverse pitch on a turbo-propeller engine is
a) debris ingestion
b) high gas temperature
c) exhaust gas ingestion , high gas temperature and debris ingestion
2. When auto feathering has taken place the feathering pump is switched off by
a) pressure control drop switch
b) removing the pump circuit breaker or fuse
c) carrying out the manual feather drill
3. A compound twin spool engine is
a) turbo prop propeller driven by a power turbine
b) turbo prop twin spool compressor
c) LP Compressor driven by a free turbine
4. On a free turbine engine it is possible to vary the propeller RPM whilst the engine
RPM remains constant
a) by operating the PCU control Lever
b) by operating the Power lever
c) it is not possible to vary the propeller RPM
5. The power output of a turbo prop engine is checked by
a) Reference RPM
b) Reference Torque
c) Reference Thrust
6. With the engine stationary the indication that the propeller is in ground fine pitch is
a) below stop warning light on
b) blade and spinner markings aligned
c) flight fine pitch stop lever withdrawn
28
7. A propeller control Unit hudraulklic system is supplied with oil from the
a) aircraft hydraulic System
b) PCU oil tank
c) engine Lubrication Oil tank
8. Low torque sensing is used to initiate
a) relighting
b) fine pitch selection
c) auto feathering
9. When the power lever on a turbo prop engine is moved from ground idle to flight
fine the fuel flow increases and the blade angle
a) increases
b) decreases
c) remains the same
10. What is the purpose of the auto coarsening system?
a) To reduce drag during power loss
b) To prevent overspeeding in the event of the flight fine pitch stop failing
c) To save the pilot making minor changes when changing altitude
ans[1] = "a";
ans[2] = "c";
ans[3] = "b";
ans[4] = "a";
ans[5] = "b";
ans[6] = "a";
ans[7] = "c";
ans[8] = "c";
ans[9] = "a";
ans[10] = "b";
explainAnswer[1]="Jepperson A&P Powerplant page 12-33 refers";
explainAnswer[2]="The pump is switched off by pressing the alternate action pump
switch-part of the manual feather drill";
explainAnswer[3]="Rolls Royce Jet Engine Page 5 refers";
explainAnswer[4]="The PCU lever changes the pressure on the governor spring thus
changing the pitch of the blades";
explainAnswer[5]="Rolls Royce Jet Engine Page 137";
explainAnswer[6]="Unattributed notes - based on Old CAIP's";
explainAnswer[7]="Jepperson Aircraft Propellers and Controls Page 59 refers";
explainAnswer[8]="Jepperson Aircraft Propellers and Controls Page 135 refers";
explainAnswer[9]="Ground idle is a lower pitch than flight idle";
29
explainAnswer[10]="Old CAIP's Leaflet PL/1-1 refer - note this is not an auto feather
system";
************************
This is exam number 15. .
--------------------------------------------------------------------------------
1. In a single acting propeller blade angle is increased by
a) CTM
b) oil pressure
c) ATM
2. The function of a propeller pitch lock is to prevent the propeller from
a) fining off
b) coarsening
c) reducing below flight fine pitch
3. The minimum propeller pitch is established by the
a) flight fine pitch stop
b) superfine pitch stop
c) pitch lock
4. Oil for the feathering system is taken from
a) a feathering reserve in the engine oil tank
b) a separate feathering oil tank
c) the engine lubrication system
5. Immediately after blending out damage to a blade the repair must be
a) reprotected against corrosion
b) balanced
c) crack checked
6. How are blade station measured?
a) In inches from the tip
b) In inches from the centre of the hub
c) As a percentage of blade length from the tip
7. Propeller blades are de-iced by
30
a) electrical heating elements wound around rubber shoes
b) electrical heating elements bound in rubber overshoes on the blade leading edges
c) generating eddy currents in the blade
8. The oil used in the torque meter system is
a) DTD585
b) PCU oil pressure
c) engine oil pressure boosted by a pump driven off the reduction gear
9. Electrical power supplies for electrical de-icing are
a) AC
b) DC
c) both AC or DC
10. How is the efficiency of a turbo prop engine assessed?
a) By comparing compressor and propeller RPM against a reference figure
b) By comparing torque meter pressure against a reference figure
c) By correcting propeller RPM for ambient Air temperature and barometric
pressure
ans[1] = "c";
ans[2] = "a";
ans[3] = "b";
ans[4] = "a";
ans[5] = "a";
ans[6] = "b";
ans[7] = "b";
ans[8] = "c";
ans[9] = "c";
ans[10] = "b";
explainAnswer[1]="Jepperson Powerplant Fig 12-12 refers";
explainAnswer[2]="Old CAIP's PL leaflets Refer";
explainAnswer[3]="Old CAIP's PL leaflets Refer";
explainAnswer[4]="Jepperson Aircraft Propellers and Controls Page 10 refers";
explainAnswer[5]="Unattributed notes. Can you find a newer reference?";
explainAnswer[6]="Jepperson Aircraft Propellers and Controls Page 10 refers";
explainAnswer[7]="Jepperson Aircraft Propellers and Controls Page 126 refers";
explainAnswer[8]="Rolls Royce The Jet Engine Fig 12-4 Refers";
explainAnswer[9]="Old CAIPs PL leaflets Refer";
explainAnswer[10]="Rolls Royce The Jet Engine Page 138 Refers";
31
*******************
This is exam number 16. .
--------------------------------------------------------------------------------
1. Which type of turbo prop engine is practically free from surge and requires low
power for starting?
a) Directly coupled
b) One using a centrifugal compressor
c) Compound twin spool
2. What are the centrifugal latches in a single acting propeller used for?
a) Prevent CTM
b) Prevent feathering of the prop on shutdown
c) Prevent propeller moving to superfine
3. Propeller slip rings
a) convey oil for PCU to pitch change mechanism
b) minimise Slip
c) conduct electrical power for de icing
4. On an electrical de-icing system fast cycle is used
a) at high air temperature
b) at low air temperature
c) on the ground
5. Blade stations are measured from the
a) shank
b) tip
c) centre of the hub
6. Auto feathering is disarmed
a) during take off
b) during landing
c) in the cruise
7. The limits for a tracking check are
a) 1/4" maximum difference between adjacent blades
b) 1/8" maximum difference between opposite blades
c) 1/8" maximum difference between all blades
8. After a lightning strike
a) the propeller must be tracked
b) the propeller shaft should be checked for concentricity
c) the heater elements should be checked for continuity and insulation
32
For full explanations of all these questions, and for many more new and up-to-date
questions, with correct answers, full explanations, downloadable material and Tutorial
Support, please visit http://www.club66pro.co.uk/
9. After overspeeding to 110%
a) remove prop for inspection
b) return prop for overhaul
c) no action is required
10. Indentations to the blade face are measured
a) individually and collectively
b) collectively
c) individually
ans[1] = "c";
ans[2] = "b";
ans[3] = "c";
ans[4] = "b";
ans[5] = "c";
ans[6] = "c";
ans[7] = "c";
ans[8] = "c";
ans[9] = "c";
ans[10] = "a";
explainAnswer[1]="Rolls Royce The Jet Engine page 5 refers";
explainAnswer[2]="Jepperson Aircraft Propellers and Controls Fig 11-4 refers";
explainAnswer[3]="Jepperson Aircraft Propellers and Controls Page 126 refers";
explainAnswer[4]="Jepperson Aircraft Propellers and Controls Page 126 refers ";
explainAnswer[5]="Jepperson Aircraft Propellers and Controls Page 13 refers ";
explainAnswer[6]="Jepperson Aircraft Propellers and Controls Page 136 refers ";
explainAnswer[7]="Jepperson Aircraft Propellers and Controls Page 43 refers ";
explainAnswer[8]="Taken from unattributed notes- has anyone got a reference";
explainAnswer[9]="Up to 115% no action is necessary";
explainAnswer[10]="Taken from unattributed notes - has anyone got a reference";
33
*********************
This is exam number 17. .
--------------------------------------------------------------------------------
1. With a multi-engined aircraft the torque pressure would be
a) same on all engines
b) similar on all engines
c) There is only one gauge for all engines
2. If torque pressure fell to zero during the cruise what would indicate that the gauge
had failed?
a) Engine would auto feather
b) Engine would overspeed
c) Engine would continue to run
3. The purpose of using reverse pitch propellers is to
a) provide aerodynamic breaking
b) reverse the direction of rotation of the propeller
c) allow aircraft to taxi backwards
4. The RPM of a windmilling propeller is primarily related to
a) EAS
b) IAS
c) TAS
5. A ducted propeller is used because
a) only ducted propellers can be vectored
b) ducted props give less thrust for the diameter of disc
c) ducted props give more thrust for the diameter of disc
6. The propeller synchronising system is put into operation by
a) adjusting the engine rpm at required cruise speed then switching on the
synchroniser
b) adjusting the engine rpm then prop rpm to required speed then switching on
c) switching on the synchroniser then adjust the engine rpm so that all engines adjust
together
7. Propellers are synchronised by the
a) power lever
b) prop lever
c) PCU governor
34
8. Thrust is greatest
a) at 70 to 80% of prop length
b) the same all along the length
c) in the first 50%
9. A two position prop uses
a) low pitch for take off and climb and high pitch for cruise
b) high pitch for take off and low pitch for cruise
c) high pitch for take off, low pitch for climb and descent and high pitch for cruise
10. In a two position propeller
a) oil pushes the prop to fine
b) oil pushes the prop to coarse
c) ATM turns the prop to fine
ans[1] = "a";
ans[2] = "c";
ans[3] = "a";
ans[4] = "c";
ans[5] = "c";
ans[6] = "a";
ans[7] = "b";
ans[8] = "a";
ans[9] = "a";
ans[10] = "a";
explainAnswer[1]="All engines are synchronised to the same RPM and are travelling at
the same forward speed";
explainAnswer[2]="Auto feather would engage if torque had actually failed";
explainAnswer[3]="Jepperson Aircraft Propellers and Controls Page 97 Refers";
explainAnswer[4]="Relative airflow is a function of rotational speed and TAS";
explainAnswer[5]="The duct provides for less tip losses";
explainAnswer[6]="Jepperson Aircraft Propellers and Controls Page 132 Refers";
explainAnswer[7]="Jepperson Aircraft Propellers and Controls Page 97 Refers the
engines must be set to within 100rpm before synchronisation is carried out. the prop lever
is used for this function";
explainAnswer[8]="Beyond this point the blade chord is reduced to lessen tip thrust";
explainAnswer[9]="Jepperson Aircraft Propellers and Controls Page 49 Refers";
explainAnswer[10]="Jepperson Aircraft Propellers and Controls Page 96 Refers";
**************
35
This is exam number 18. .
--------------------------------------------------------------------------------
1. CTM changes the pitch of a blade
a) about its twisting axis
b) towards the feather plane
c) bending forward
2. When a propeller has had a report of overspeeding
a) the propeller must be removed and tracked
b) it is dependant on the extent of overspeeding
c) the propeller must be removed and sent to the manufacturer
3. The velocity of the slipstream behind the aircraft in relation to the ambient air is
a) equal
b) greater
c) less
4. High speed aerofoils are employed at
a) the tips
b) the master station
c) the root
5. A right hand propeller
a) rotates clockwise when viewed from the rear
b) rotates clockwise when viewed from the front
c) is always fitted to the stbd engine
6. The output of an anti-icing pump is controlled by
a) a cyclic timer
b) a rheostat
c) the hand pump
7.
a)
b)
c)
36
8.
a)
b)
c)
9.
a)
b)
c)
10.
a)
b)
c)
ans[1] = "a";
ans[2] = "b";
ans[3] = "b";
ans[4] = "a";
ans[5] = "a";
ans[6] = "b";
ans[7] = "";
ans[8] = "";
ans[9] = "";
ans[10] = "";
explainAnswer[1]="Jepperson Aircraft Propellers and Controls Page 15 Refers";
explainAnswer[2]="Old CAIPS PL/1-4 refers";
explainAnswer[3]="The propeller acts to accelerate the air through the disc";
explainAnswer[4]="On helicopters they are called BERP tips";
explainAnswer[5]="Left or right is determined by sitting in the cockpit and viewing the
rotation";
explainAnswer[6]="Jepperson Aircraft Propellers and Controls Page 124 Refers";
explainAnswer[7]="";
explainAnswer[8]="";
explainAnswer[9]="";
explainAnswer[10]="";
37
***************
NO ANSWER
1. A reversing propeller goes to reverse pitch
a) through course then back through course
b) through fine then back through course
c) through fine then back through fine
Jepperson Aircraft Propellers and Controls Page 97 refers
2. The pressure face of a propeller is
a) the leading edge
b) the camber face
c) the flat face
3. When a propeller is removed, the parts are kept with
a) the propeller
b) the engine
c) all separately in cases
4. When measuring RPM on a super charged engine with variable pitch
a) engine boost pressure and actual air pressure is used
b) zero boost pressure and actual air pressure is used
c) maximum boost pressure and actual air pressure is used
5. How is the efficiency of a turbo-propeller engine assessed?
a) By compressor and propeller r.p.m. against a reference figure
b) By comparing toque meter pressure against a reference figure
c) By correcting propeller r.p.m. for ambient air temperature and barometric
pressure