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Question 52-1 : Rotor brakes are often located ? [ Test maintenance ]

On the tail rotor drive shaft

exemple 152 On the tail rotor drive shaft.

Question 52-2 : Rotor brake discs are manufactured from ?

Steel or carbon fibre

exemple 156 Steel or carbon fibre.

Question 52-3 : Wear rate of a control rod spherical bearing is ?

Exponential

exemple 160 Exponential.

Question 52-4 : The purpose of the fixed scissors is to ?

Resist the rotational force applied to the lower swashplate in a rotorhead system

exemple 164 Resist the rotational force applied to the lower swashplate in a rotorhead system.

Question 52-5 : Tail rotors differ from most main rotors in that ?

The pitch changes from a negative angle setting to a positive angle setting

exemple 168 The pitch changes from a negative angle setting to a positive angle setting.

Question 52-6 : Tail rotors differ from main rotors in that ?

They do not provide for blade pitch cyclic variation

exemple 172 They do not provide for blade pitch cyclic variation.

Question 52-7 : Main rotor droop stops ?

Are inactive during flight

exemple 176 Are inactive during flight.

Question 52-8 : An unshrouded tail rotor has ?

Equal pitch change to all blades


Question 52-9 : On the diagram the rotating blade pitch control is indicated by the letter . 2436 ?

D

exemple 184 D.

Question 52-10 : What is a typical characteristic of a fully articulated rotor system ?

The blades are free to flap drag and feather independently of one another


Question 52-11 : Which of the following statements with respect to the rotor brake is correct ?

The rotor brake is nearly always implemented as a disc brake

exemple 192 The rotor brake is nearly always implemented as a disc brake.

Question 52-12 : A rotor is fully articulated when ?

The blades each have the possibility to flap drag and feather separately

exemple 196 The blades each have the possibility to flap, drag and feather separately.

Question 52-13 : The chord length of the blades of a ducted tail rotor fenestron is ?

Smaller than that of a classic tail rotor

exemple 200 Smaller than that of a classic tail rotor.

Question 52-14 : An elastomeric bearing flapping hinge in the rotor head ?

Contributes to a reduced maintenance effort

exemple 204 Contributes to a reduced maintenance effort.

Question 52-15 : What are elastomeric bearing hinges in a rotor head ?

Flexible sections accomplishing the functions of flapping dragging and feathering hinges

exemple 208 Flexible sections accomplishing the functions of flapping, dragging and feathering hinges.

Question 52-16 : Intermediate or angle gearboxes are used to ?

Change the direction and sometimes the speed of the tail rotor drive

exemple 212 Change the direction and sometimes the speed of the tail rotor drive.

Question 52-17 : To engage the main rotor drive prior to flight on a helicopter fitted with a centrifugal clutch the pilot should ?

Smoothly accelerate the engine with rotor brake selected off

exemple 216 Smoothly accelerate the engine with rotor brake selected off.

Question 52-18 : The tail rotor gearbox changes direction of drive ?

Through 90° reduces rotational speed and provides facilities for tail rotor control

Img2761.the antitorque rotor tail rotor is driven from the transmission the antitorque rotor produces thrust to oppose torque and helps prevent the helicopter from turning in the opposite direction of the main rotor exemple 220 Through 90°, reduces rotational speed and provides facilities for tail rotor control.

Question 52-19 : The purpose of a clutch in a helicopter transmission system is to ?

Permit the engine to be started with a low inertial loading

exemple 224 Permit the engine to be started with a low inertial loading.

Question 52-20 : Rotational drive from the gearbox to the rotorhead is transmitted by the ?

Main drive shaft

exemple 228 Main drive shaft.

Question 52-21 : Intermediate or angle gearboxes are used to ?

Change the direction and speed of the tail rotor drive

exemple 232 Change the direction and speed of the tail rotor drive.

Question 52-22 : In a free turbine helicopter installation ?

There is no need for a clutch between the engine and the transmission

exemple 236 There is no need for a clutch between the engine and the transmission.

Question 52-23 : Helicopters which utilise a ''v' belt to transmit the drive from the engine to the transmission also incorporate ''belt tighteners'' these belt tighteners serve as ?

A manual clutch

exemple 240 A manual clutch.

Question 52-24 : Freewheel units between engine and main rotor gearbox are in most cases lubricated from ?

The main rotor gearbox lubrication system

exemple 244 The main rotor gearbox lubrication system.

Question 52-25 : For a free power turbine engine ?

The turbine driving the main rotor transmission is mechanically independent from the gas generator

exemple 248 The turbine driving the main rotor transmission is mechanically independent from the gas generator.

Question 52-26 : Clutches are located in the drive between the engine and the main transmission on ?

Helicopters with piston or direct drive gas turbine engines

exemple 252 Helicopters with piston or direct drive gas turbine engines.

Question 52-27 : A tail rotor drive shaft running between two engines should be ?

Protected by a firewall

exemple 256 Protected by a firewall.

Question 52-28 : What is the purpose of the freewheel unit in the rotor drive system ?

To disconnect the failed engine from the main and tail rotor drive

exemple 260 To disconnect the failed engine from the main and tail rotor drive.

Question 52-29 : Does the freewheel unit is necessary for helicopter with free turbine engine ?

Yes

exemple 264 Yes.

Question 52-30 : A snatch engagement of a freewheel unit ?

May result in the shearing of the engine drive shaft

exemple 268 May result in the shearing of the engine drive shaft.

Question 52-31 : A mercury clutch ?

Utilises the weight of the mercury to provide the centrifugal force to act on the clutch shoes

exemple 272 Utilises the weight of the mercury to provide the centrifugal force to act on the clutch shoes.

Question 52-32 : The input and output speeds of an intermediate gearbox ?

Differ to counter the effects of vibration

exemple 276 Differ to counter the effects of vibration.

Question 52-33 : Tail rotors rotate ?

At a greater speed than the main rotor and at a different speed than the drive shaft and intermediate gearbox

exemple 280 At a greater speed than the main rotor and at a different speed than the drive shaft and intermediate gearbox.

Question 52-34 : Why are one or more flexible couplings usually incorporated in the tail rotor drive shafts ?

To absorb the angular differences arising from bending of the tail

exemple 284 To absorb the angular differences arising from bending of the tail.

Question 52-35 : Metal tail rotor drive shafts are normally manufactured from ?

Aluminium or steel tubing

exemple 288 Aluminium or steel tubing.

Question 52-36 : On the diagram the flapping hinge is indicated by number ?

1

exemple 292 1.

Question 52-37 : When using a strobe type tracking and balancing system on a fully articulated rotor head one blade is not equidistant from the other blades in the lateral plane the cause of this defect is that ?

The blade damper on the subject blade is not functioning correctly

exemple 296 The blade damper on the subject blade is not functioning correctly.

Question 52-38 : What indication will be available to the pilot of wear in either tail rotor gimbal or pitch change link bearings ?

Vibration through the tail rotor/yaw pedals

exemple 300 Vibration through the tail rotor/yaw pedals.

Question 52-39 : On the diagram the lead/lag hinge is indicated by number . 2429 ?

2

exemple 304 2.

Question 52-40 : On the diagram the pitch hinge is indicated by number . 2429 ?

3

exemple 308 3.


Short Modules and Progression
Each question follows on from each other without any loading time, so that each module can be quickly completed in a continuous progression. This segmentation boosts motivation and avoids the discouragement effect associated with long sessions. Ideal for staying engaged day after day.

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