2A656 CDC 3
.jpg "2A656 CDC 3 - Quiz")
Electrical & Enviornmental 5 Level Test
- 1.
In the Mark II antiskid circuit, the component that translates a change of frequency into control signals is the?
- A.
Transducer
- B.
Control shield
- C.
Bias modulator
- D.
Wheel generator
Correct Answer
B. Control shield -
- 2.
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?
- A.
Closing of the door
- B.
Closing of the ramp
- C.
Opening of the door
- D.
Opening of the ramp
Correct Answer
B. Closing of the ramp -
- 3.
If the warning horn indicates that the landing gear is not down and locked, the
- A.
Wing flaps are not adequately extended
- B.
Throttle exceeds minimum cruise power
- C.
Warning light circuit is grounded through the LG selector valve
- D.
Warning light circuit completes circuit through the press-to-test ground
Correct Answer
A. Wing flaps are not adequately extended -
- 4.
The position switches provide voltage to the locked solenoid of the ramp up-lock control valve when the?
- A.
Door is in the fully up position
- B.
Ramp is in the fully up position
- C.
Door is in the fully down position
- D.
Ramp is in the fully down position
Correct Answer
B. Ramp is in the fully up position -
- 5.
Which ramp and cargo door system component completes the circuit to the ramp control valve?
- A.
Position switches
- B.
Ramp down unlock relay
- C.
Door and ramp control switch
- D.
Locking cylinder unlocked switch
Correct Answer
D. Locking cylinder unlocked switch -
- 6.
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
- A.
Taxi light
- B.
Taxi light relay
- C.
Taxi light ground wire
- D.
Wire between relay and taxi light
Correct Answer
B. Taxi light relay -
- 7.
Which relay or relays must be energized before the anti-collision light will come on?
- A.
Flasher
- B.
Anti-collision
- C.
Both anti-collision and flasher
- D.
Both anti-collision and landing light
Correct Answer
C. Both anti-collision and flasher -
- 8.
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?
- A.
115 VAC
- B.
115 VDC
- C.
14 VAC
- D.
28 VDC
Correct Answer
D. 28 VDC -
- 9.
How many pulses per minute does the strobe light power supply provide the "trigger" voltage to the strobe anti-collision lights?
- A.
40 to 50
- B.
50 to 60
- C.
60 to 70
- D.
70 to 80
Correct Answer
B. 50 to 60 -
- 10.
The first step in troubleshooting a malfunction in an aircraft lighting system is to?
- A.
Obtain a job number
- B.
Repair the malfunction
- C.
Analyze the malfunction
- D.
Obtain tools to repair the malfunction
Correct Answer
C. Analyze the malfunction -
- 11.
When the nosewheel steering shutoff valve is energized, hydraulic pressure is applied to the?
- A.
Steering actuator
- B.
Steering control box
- C.
Command potentiometer
- D.
Right and left steering control valve
Correct Answer
D. Right and left steering control valve -
- 12.
The 28 direct current (DC) voltage (VDC) from main DC bus No. 1 to the rudder pedal nose-steering select-valve coil is controlled by the
- A.
Rudder pedal steering control relay
- B.
Nose landing gear steering actuator
- C.
Rudder pedal steering actuator
- D.
Wheel rotation detector relay
Correct Answer
A. Rudder pedal steering control relay -
- 13.
For the wheel rotation detector control relays to energize, wheel speed in revolutions per minute (rpm) must be at least
- A.
425 rpm
- B.
450 rpm
- C.
475 rpm
- D.
500 rpm
Correct Answer
D. 500 rpm -
- 14.
Where should you first take ohmmeter readings if the nosewheel steering(NWS) fail light illuminates?
- A.
Command and feedback potentiometers
- B.
Weight on wheels switch
- C.
Contact B1 of relay K1
- D.
Steering control box
Correct Answer
A. Command and feedback potentiometers -
- 15.
What is used to dim aircraft interior console lights?
- A.
Variable resistors
- B.
Variable transformers
- C.
Switching lights in series
- D.
Switching network of resistors
Correct Answer
B. Variable transformers -
- 16.
A signal to the steering control box that indicates the position of the hydraulic linear actuator is provided by the?
- A.
Rudder pedals
- B.
Nose gear indicator
- C.
Main potentiometer
- D.
Follow-up potentiometer
Correct Answer
D. Follow-up potentiometer -
- 17.
What component in the nosewheel steering system provides a quick-disconnect capability for turning the nose wheel beyond the steerable range?
- A.
Scissors assembly
- B.
Steer control valve
- C.
Hydraulic linear actuator
- D.
NWS A/R DISC MSL step switch
Correct Answer
A. Scissors assembly -
- 18.
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?
- A.
Wiring
- B.
Lightbulb
- C.
Control shield
- D.
Wheen generator
Correct Answer
B. Lightbulb -
- 19.
Placing the landing gear control handle in the up position provides 28 direct current (DC) voltage (VDC) from the
- A.
Emergency DC bus
- B.
Right main DC bus
- C.
Essential DC bus
- D.
Isolated DC bus
Correct Answer
C. Essential DC bus -
- 20.
When the cargo and personnel doors close and lock, the door-
- A.
Open relay will energize
- B.
Open relay will deenergize
- C.
Position relay will energize
- D.
Position relay will deenergize
Correct Answer
B. Open relay will deenergize -
- 21.
When all systems are configured for flight, the pilot or copilot must press the?
- A.
Aileron roll trim lever
- B.
Autopilot engage lever
- C.
Hydraulic pitch trim levers
- D.
Thrust reverser locked lever
Correct Answer
C. Hydraulic pitch trim levers -
- 22.
After an operational check confirms that the takeoff light does not illuminate, you would first check the?
- A.
Wiring and relays
- B.
Wiring and circuit breakers
- C.
Takeoff lightbulbs and wiring
- D.
Takeoff lightbulbs and circuit breakers
Correct Answer
D. Takeoff lightbulbs and circuit breakers -
- 23.
The data bus component that coordinates the flow of information on the data bus is the?
- A.
Data bus controller
- B.
Parallel data bus
- C.
Remote terminal
- D.
Serial data bus
Correct Answer
A. Data bus controller -
- 24.
What components in the landing gear system initiate a signal that identifies the landing gear position at any given time?
- A.
Limit switches
- B.
Touchdown relays
- C.
Control handle solenoids
- D.
Up-lock and down-lock cylinder sending units
Correct Answer
A. Limit switches -
- 25.
What is the maximum number of remote terminals that can be connected on any single Data Bus?
- A.
20
- B.
22
- C.
30
- D.
32
Correct Answer
D. 32 -
- 26.
The first step you take when troubleshooting the master caution system is to?
- A.
Analyze the problem
- B.
Start voltage checks
- C.
Start continuity checks
- D.
Perform an operational check
Correct Answer
A. Analyze the problem -
- 27.
In a continuous loop fire detection system, the shield of the continuous loop is constructed of?
- A.
Soft iron
- B.
Aluminum
- C.
Malleable tin
- D.
INCONEL ®
Correct Answer
D. INCONEL ® -
- 28.
The direct current (DC) voltage that is supplied to the lights in a photoelectric circuit is pulsed at a rate of
- A.
10 Hz
- B.
100 Hz
- C.
200 Hz
- D.
400 Hz
Correct Answer
A. 10 Hz -
- 29.
The maximum circuit resistance within a thermocouple circuit is?
- A.
5 ohms
- B.
50 ohms
- C.
500 ohms
- D.
Infinity
Correct Answer
A. 5 ohms -
- 30.
Amplifiers used in the photoelectric fire detector system are sensitive only?
- A.
Sunlight
- B.
Light emitted from flashlights
- C.
Signals with a frequency between 7 to 60 Hz
- D.
Signals with a frequency between 60 to 160 Hz
Correct Answer
C. Signals with a frequency between 7 to 60 Hz -
- 31.
The output in gallons per minute(gpm) of the scavenge pumps is approximately?
- A.
½ gpm
- B.
1 gpm
- C.
2 gpm
- D.
3 gpm
Correct Answer
C. 2 gpm -
- 32.
If an ohmeter reading from case ground to one phase of the fuel boost pump indicates infinity. this indicates?
- A.
Two phases shorted together
- B.
A dead short in the circuit
- C.
An open in the circuit
- D.
A normal reading
Correct Answer
D. A normal reading -
- 33.
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.
A photocunductive cell
- B.
An iron fireman switch
- C.
A FENWAL switch
- D.
A continuous switch
Correct Answer
B. An iron fireman switch -
- 34.
The green band on the main fuel tank fuel-quantity indicator
- A.
Calibrates the main tank fuel-indicator
- B.
Gives an indication of boost pump pressure
- C.
Indicates when the gauge needs to be replaced
- D.
Indicates where the safe-level switfhes open the electrical circuit
Correct Answer
D. Indicates where the safe-level switfhes open the electrical circuit -
- 35.
How many boost pumps are there in main fuel tank No. 1?
- A.
Two
- B.
Three
- C.
Four
- D.
Five
Correct Answer
C. Four -
- 36.
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.
A warning horn sounds
- B.
The dome lights come on bright
- C.
An audible fuel-low warning sounds
- D.
The amber light next to the fuel-quantity indicator flashes
Correct Answer
D. The amber light next to the fuel-quantity indicator flashes -
- 37.
How does the auxiliary fuel tank indicating system give a no-flow indication?
- A.
Steady red light
- B.
Flashing red light
- C.
Steady amber light
- D.
Flashing amber light
Correct Answer
D. Flashing amber light -
- 38.
You can check the fuel boost pumps in the fuel control system by?
- A.
Pulling and resetting the pump circuit breaker
- B.
Depressing a pressure switch
- C.
Measuring fuel-flow
- D.
Using a multimeter
Correct Answer
A. Pulling and resetting the pump circuit breaker -
- 39.
What type of fuel system valves link the left wing and aft body tanks to the right wing, mid body, and forward body tranks?
- A.
Crossfeed
- B.
Fire shutoff
- C.
Interconnect
- D.
Fuel-level control
Correct Answer
C. Interconnect -
- 40.
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?
- A.
Starter fuse
- B.
Starter relay
- C.
Control switch
- D.
Ignition hold relay
Correct Answer
A. Starter fuse -
- 41.
In a direct-current(DC) ignition system, what component changes the direct current into a pulsating current?
- A.
Magnet
- B.
Vibrator unit
- C.
Small generator
- D.
Step-up transformer
Correct Answer
B. Vibrator unit -
- 42.
If the engine starter system is operating properly but the aircraft engine will not start, what components are working properly?
- A.
Centrifugal switches
- B.
Step-up transformers
- C.
Aircraft wiring
- D.
Igniter plugs
Correct Answer
A. Centrifugal switches -
- 43.
The alternating current(AC) voltage(VAC) power requirement for operation of an AC ignition system is?
- A.
115 VAC, 60 Hz
- B.
208 VAC, 60 Hz
- C.
115 VAC, 400 Hz
- D.
208 VAC, 400 Hz
Correct Answer
C. 115 VAC, 400 Hz -
- 44.
What happens to the air in a pneumatic started system when the regulating-and-shutoff valve closes?
- A.
Vented overboard
- B.
Channeled into the starter
- C.
Exhausted by the valve actuator
- D.
Routed through the valve-regulator
Correct Answer
A. Vented overboard -
- 45.
What is used to minimize the initial torque shock to the drive coupling at the beginning of fuel-air operation?
- A.
Slip-type clutch
- B.
Hydraulic clutch
- C.
Pneumatic shock
- D.
Sprag-type clutch
Correct Answer
A. Slip-type clutch -
- 46.
When a pneumatic starter reaches maximum speed, the ground circuit to the starter relay is opened by?
- A.
The pilot valve
- B.
A pressure switch
- C.
Centrifugal switch
- D.
The ON-OFF switch in the cockpit
Correct Answer
C. Centrifugal switch -
- 47.
If the speedbrakes are fully open and the landing gear is down and locked while the aircraft is in flight, the speedbrakes will be?
- A.
Fully extended
- B.
Fully retracted
- C.
Limited to 43 degrees
- D.
Limited to 60 degrees
Correct Answer
C. Limited to 43 degrees -
- 48.
After flap actuator jackscrews have reached the fully retracted position, what stops the rotation of the flap lock motor?
- A.
Drive shafts
- B.
Flap lock screws
- C.
Flap power down relay
- D.
Motor retract limit switch
Correct Answer
D. Motor retract limit switch -
- 49.
After the stick grip trim selector switch is released, the trim indicator light?
- A.
Extinguishes
- B.
Remains illuminated
- C.
Flashes on and off briefly
- D.
Remains on throughout the full cycle of the ailerons
Correct Answer
A. Extinguishes -
- 50.
The two types of wing flaps used on heavy aircraft are?
- A.
Solid and Fowler
- B.
Slotted and Fowler
- C.
Solid and retractable
- D.
Slotted and retractable
Correct Answer
B. Slotted and Fowler -
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Current Version
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Feb 15, 2013Quiz Edited by
ProProfs Editorial Team -
Apr 13, 2012Quiz Created by
Nevin Karthikezhiyam
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