2A656 CDC 3

1. The first step in troubleshooting a malfunction in an aircraft lighting system is to?

Obtain a job number

Repair the malfunction

Analyze the malfunction

Obtain tools to repair the malfunction

2. At what alternating current voltage range does the generator control unit in an AC power supply system maintain generator output?

135 [±3] VAC

125 [±3] VAC.

115 [±2] VAC.

105 [±2] VAC.

3. The constand speed drive (CSD) that is used to drive a 60/80 Kilo Volts Amperes(kVA) generator has a revolutions per minutes (rpm) output of approximately?

4,000 rpm

6,000 rpm

8,000 rpm

10,000 rpm

4. Placing the landing gear control handle in the up position provides 28 direct current (DC) voltage (VDC) from the

Emergency DC bus

Right main DC bus

Essential DC bus

Isolated DC bus

5. The data bus component that coordinates the flow of information on the data bus is the?

Data bus controller

Parallel data bus

Remote terminal

Serial data bus

6. The alternating current(AC) voltage(VAC) power requirement for operation of an AC ignition system is?

115 VAC, 60 Hz

208 VAC, 60 Hz

115 VAC, 400 Hz

208 VAC, 400 Hz

7. In a continuous loop fire detection system, the shield of the continuous loop is constructed of?

Soft iron

Aluminum

Malleable tin

INCONEL ®

8. When troubleshooting a problem(ex. external power will not come on-line and the READY light is not on), the first thing you should do is?

Do an operational check to verify the problem

Check for continuity on the external power unit

Replace the external power unit

Take voltage readings

9. If the speedbrakes are fully open and the landing gear is down and locked while the aircraft is in flight, the speedbrakes will be?

Fully extended

Fully retracted

Limited to 43 degrees

Limited to 60 degrees

10. What component in the nosewheel steering system provides a quick-disconnect capability for turning the nose wheel beyond the steerable range?

Scissors assembly

Steer control valve

Hydraulic linear actuator

NWS A/R DISC MSL step switch

11. When the aft body fuel tank is supplying fuel to the aircraft engines and the fuel level becomes too low, what signal is given to warn the crew?

A warning horn sounds

The dome lights come on bright

An audible fuel-low warning sounds

The amber light next to the fuel-quantity indicator flashes

12. Which emergency alternating current power system component prevents the emergency generator from dropping off-line when the aircraft lands?

Emergency power disconnect relay (EPDR).

Emergency power interlock relay (EPIR).

Emergency generator test switch (EGTS).

Power fail relay (PFR).

13. During an operational check on the anitskid system, if you discover that the antiskid inoperative light is not working when the system is turned off, you would check?

Wiring

Lightbulb

Control shield

Wheen generator

14. What happens to the air in a pneumatic started system when the regulating-and-shutoff valve closes?

Vented overboard

Channeled into the starter

Exhausted by the valve actuator

Routed through the valve-regulator

15. When a pneumatic starter reaches maximum speed, the ground circuit to the starter relay is opened by?

The pilot valve

A pressure switch

Centrifugal switch

The ON-OFF switch in the cockpit

16. After the stick grip trim selector switch is released, the trim indicator light?

Extinguishes

Remains illuminated

Flashes on and off briefly

Remains on throughout the full cycle of the ailerons

17. Takeoff trim indicator lights are used to?

Indicate that the ailerons must be trimmed

Indicate when the ailerons are in the takeoff position

Warn the pilot when the aircraft is out of flight formation

Prevent feedback current from passing to the deenergized side of the circuit

18. If the No. 1 generator will not come on-line and the voltmeter readings are 28 VDC at the generator control switch, 28 VDC at the input to the generator line contactor coil, and 28 VDC at the ground of the generator line contactor, the most likely cause is?

An open GLC coil

A shorted GLC coil

An open GLC ground

A shorted GLC ground

19. The underspeed switch on the 60/80 kVA generator contstand speed drive actuates at?

325 Hz

345 Hz

365 Hz

395 Hz

20. The auxiliary source selected to power the tie bus in the auxiliary power unit(APU) is determined by the?

Lockout relay (LOR).

Bus protection panel (BPP).

APU/external power contactor (AEPC).

APAPU external power disconnect contactor (AEDC).

21. The two types of wing flaps used on heavy aircraft are?

Solid and Fowler

Slotted and Fowler

Solid and retractable

Slotted and retractable

22. In an alternating current power supply system, the component that controls load division during parallel generator operation is the?

Load controller

Underspeed switch

Constant speed drive

Generator control unit

23. Which relay or relays must be energized before the anti-collision light will come on?

Flasher

Anti-collision

Both anti-collision and flasher

Both anti-collision and landing light

24. The output in gallons per minute(gpm) of the scavenge pumps is approximately?

½ gpm

1 gpm

2 gpm

3 gpm

25. After flap actuator jackscrews have reached the fully retracted position, what stops the rotation of the flap lock motor?

Drive shafts

Flap lock screws

Flap power down relay

Motor retract limit switch

26. Excessive wear of the ball detent clutch in the stabilizer trim actuator assembly most likely occurs when?

There is not enough lubrication

There is no observer in the tail compartment

The pilot and copilot trim switches are actuated in opposite direction

The jackscrew is allowed to extend to the maximum travel while the aircraft is on the ground

27. In the direct current power supply, the delta-wound secondaries of the internal transformer in the transformer rectifier unit are used to provide a more stable?

Current input

Voltage input

Current output

Voltage output

28. On the external power system, when the ohmeter shows an infinity reading on an external power receptacle, between the points where control voltage leaves the bus protection panel and returns,

The external power unit is operating properly

The external power unit is not operating at all

There is continuity in the loop

There is an open in the loop

29. The position switches provide voltage to the locked solenoid of the ramp up-lock control valve when the?

Door is in the fully up position

Ramp is in the fully up position

Door is in the fully down position

Ramp is in the fully down position

30. After an operational check confirms that the takeoff light does not illuminate, you would first check the?

Wiring and relays

Wiring and circuit breakers

Takeoff lightbulbs and wiring

Takeoff lightbulbs and circuit breakers

31. Amplifiers used in the photoelectric fire detector system are sensitive only?

Sunlight

Light emitted from flashlights

Signals with a frequency between 7 to 60 Hz

Signals with a frequency between 60 to 160 Hz

32. What happens if the pilot uses the ramp and cargo door switch while the aircraft is in flight?

Ramp opens first

Door opens first

Ramp and door open at the same time

The door will open but the ramp will remain closed

33. In a direct-current(DC) ignition system, what component changes the direct current into a pulsating current?

Magnet

Vibrator unit

Small generator

Step-up transformer

34. The aircraft write-up states that there is no trim action from either the pilots or co-pilots stabilizer trim control switch. You troubleshoot the problem and find voltage and ground at the stabilizer trim actuator. The most probable cause of this problem is the stabilizer trim

Actuator

Safety relay

Cutout switch

Control switch

35. The output of the auxiliary power unit generator is maintained at a constant level?

By varying APU speed

By controlling the APU fuel-flow

With the main engine throttles

With the protection circuits in the generator control unit (GCU)

36. What is the minimum alternating current voltage requirement to energize the Emergency Power Disconnect Relay?

90 VAC from Aᶿ.

90 VAC from Cᶿ.

93 VAC from Aᶿ.

93 VAC from Cᶿ.

37. When the cargo and personnel doors close and lock, the door-

Open relay will energize

Open relay will deenergize

Position relay will energize

Position relay will deenergize

38. Which stabilizer trim system switch can be used to shut off the stabilizer trim system?

Stabilizer trim control relay

Stabilizer trim cutout switch

Stabilizer trim nose down-limit switch

Pilots or co-pilots trim control switch

39. How many boost pumps are there in main fuel tank No. 1?

Two

Three

Four

Five

40. What type of fuel system valves link the left wing and aft body tanks to the right wing, mid body, and forward body tranks?

Crossfeed

Fire shutoff

Interconnect

Fuel-level control

41. When the stick grip trim selector switch is moved to the left, the position of the aircraft left aileron is?

Up (left wing up)

Up (left wing down)

Down (right wing up)

Down (right wing down)

42. What is the cause of a normal battery not charging, when the direct current power supply system is operating and the battery switch is in the NORMAL position?

No. 1 transformer rectifier unit inoperable

No. 2 TR unit inoperable

Open standby battery relay

Open normal battery relay

43. During normal operation, the reverse current relays, in a direct current power supply system, receive power from the?

Transformer rectifier(TR)units

Emergency DC bus

Battery bus

Battery

44. What type of power is stepped up by the strobe light power supply to act as the "trigger" voltage for the strobe anti-collision lights?

115 VAC

115 VDC

14 VAC

28 VDC

45. What is used to minimize the initial torque shock to the drive coupling at the beginning of fuel-air operation?

Slip-type clutch

Hydraulic clutch

Pneumatic shock

Sprag-type clutch

46. What component is used as an emergency means of controlling the aileron trim control?

Control stick grip trim switch

Aileron trim control switch

Trim selector switch

Auxiliary trim switch

47. The green band on the main fuel tank fuel-quantity indicator

Calibrates the main tank fuel-indicator

Gives an indication of boost pump pressure

Indicates when the gauge needs to be replaced

Indicates where the safe-level switfhes open the electrical circuit

48. What is the maximum number of remote terminals that can be connected on any single Data Bus?

20

22

30

32

49. Frequently used in fire warning systems, the fire detector that has a high-nickel steel rod located along the centerline of a stainless steel tube assembly is called?

A photocunductive cell

An iron fireman switch

A FENWAL switch

A continuous switch

50. You can check the fuel boost pumps in the fuel control system by?

Pulling and resetting the pump circuit breaker

Depressing a pressure switch

Measuring fuel-flow

Using a multimeter

51. What components in the landing gear system initiate a signal that identifies the landing gear position at any given time?

Limit switches

Touchdown relays

Control handle solenoids

Up-lock and down-lock cylinder sending units

52. When all systems are configured for flight, the pilot or copilot must press the?

Aileron roll trim lever

Autopilot engage lever

Hydraulic pitch trim levers

Thrust reverser locked lever

53. The maximum circuit resistance within a thermocouple circuit is?

5 ohms

50 ohms

500 ohms

Infinity

54. What circuit in the generator control unit in an alternating current power supply system isolates shorted or open generator phase leads?

Reactive biasing

Voltage regulator

Neutral current-sensing

Unbalanced current-sensing

55. If an ohmeter reading from case ground to one phase of the fuel boost pump indicates infinity. this indicates?

Two phases shorted together

A dead short in the circuit

An open in the circuit

A normal reading

56. What could cause the GEN OUT light to stay on?

Bus tie switch

Bus tie contactor

Open GEN OUT light

Generator control switch

57. If the warning horn indicates that the landing gear is not down and locked, the

Wing flaps are not adequately extended

Throttle exceeds minimum cruise power

Warning light circuit is grounded through the LG selector valve

Warning light circuit completes circuit through the press-to-test ground

58. How does the auxiliary fuel tank indicating system give a no-flow indication?

Steady red light

Flashing red light

Steady amber light

Flashing amber light

59. In an alternating current power supply system, what component connects the 115/200 alternating current voltage main generator output to the main power buses?

Bus tie lockout (BTL).

Bus tie contactor (BTC).

Generator control unit (GCU).

Generator line contactor (GLC).

60. The left-hand and right-hand position switches in the ramp and cargo door system supply power to the ramp up-lock control valve during?

Closing of the door

Closing of the ramp

Opening of the door

Opening of the ramp

61. How many pulses per minute does the strobe light power supply provide the "trigger" voltage to the strobe anti-collision lights?

40 to 50

50 to 60

60 to 70

70 to 80

62. The direct current (DC) voltage that is supplied to the lights in a photoelectric circuit is pulsed at a rate of

10 Hz

100 Hz

200 Hz

400 Hz

63. If the engine starter system is operating properly but the aircraft engine will not start, what components are working properly?

Centrifugal switches

Step-up transformers

Aircraft wiring

Igniter plugs

64. The first step you take when troubleshooting the master caution system is to?

Analyze the problem

Start voltage checks

Start continuity checks

Perform an operational check

65. While troubleshooting an inoperative taxi light, if you check for 28-volts alternating current(VAC) on terminal A2 of the taxi light relay and find 0 VAC, the most probable cause for this problem is an open

Taxi light

Taxi light relay

Taxi light ground wire

Wire between relay and taxi light

66. Where should you first take ohmmeter readings if the nosewheel steering(NWS) fail light illuminates?

Command and feedback potentiometers

Weight on wheels switch

Contact B1 of relay K1

Steering control box

67. If the gas turbine compressor (GTC) does not start, but the start light comes on and stays on when the control switch is placed to the START and RUN positions, what do you check first?

Starter fuse

Starter relay

Control switch

Ignition hold relay

68. A signal to the steering control box that indicates the position of the hydraulic linear actuator is provided by the?

Rudder pedals

Nose gear indicator

Main potentiometer

Follow-up potentiometer

69. When the nosewheel steering shutoff valve is energized, hydraulic pressure is applied to the?

Steering actuator