C5M APU

1.

4 points

With external power connected and a serviceable APU battery installed. The APU battery charger switch shall_____________________.

be in the ON position

be in the OFF position

be in the BY-PASS position

be in the ON or BY-PASS position

2.

4 points

On receipt of a STOP command, the APU FADEC transitions from RUN state to cool down state for ________________ from the last time ___________ load was detected before shutting down.

60 Seconds, APU generator

30 Seconds, APU generator

120 Seconds, bleed air

110 Seconds, bleed air

3.

4 points

Why must one battery be serviceable and connected to the battery bus during operation of the APU ?

To provide emergency radio operation and power for emergency APU shut down

To provide power for APU fire extinguishing and emergency radio operation

To provide emergency power for radio operation

To provide power for APU fire extinguishing and emergency APU shut down

4.

4 points

How long can the APU operate with the EGT reading between 691 and 746 C ?

2 Minutes

30 Seconds

3 Minutes

1 Minute

5.

4 points

During ground starting of the APU, the FADEC should auto shutdown if APU EGT is greater than ____________.

700 deg's C

899 deg's C

890 deg's C

692 deg's C

6.

4 points

A warning Light Emitting Diode (LED) on the APU fire bottle mount __________________ .

will come on to indicate the bottle is shorted out.

will come on to indicate normal pressure.

will come on to indicate pressure.

will come on to indicate loss of pressure.

7.

4 points

How long can an ATM operate without normal hydraulic pressure ?

60 Seconds

30 Seconds

5 Seconds

15 Seconds

8.

4 points

What is the name of the Red Box encompassing the APU gages?

APU COOLDOWN BOX

APU START BOX

APU OPERATING AIRBORNE

INADVERTENT SHUTDOWN BOX

9.

4 points

What effect would having the aircraft on jacks, or two main landing gear cross knelt, or number 1 touchdown relay circuit breaker pulled have on the APU.

The loss of auto shutdown features: Fire, EGT overtemperature, Loss of both EGT thermocouples, Low oil pressure, High gearbox oil temperature, Gearbox oil temperature failed, Fail to accelerate during Start, Surge and BCV failed, and the APU fire warning audible horn.

The loss of auto shutdown features: Overspeed, Underspeed, Loss of both speed sensors, Fail to light (no EGT rise after start), Fail to crank (no speed rise during start), FADEC internal circuit/memory fault, APU inlet door closing while APU is in run state and the APU fire warning audible horn and tone are prohibited.

The loss of auto shutdown features: EGT overtemperature, Loss of both EGT thermocouples, Low oil pressure, High gearbox oil temperature, Gearbox oil temperature failed, Fail to accelerate during Start, Surge and BCV failed, and the APU fire warning audible horn and tone are prohibited.

The loss of auto shutdown features: Overspeed, Underspeed, Loss of both speed sensors, Fail to light (no EGT rise after start), Fail to crank (no speed rise during start), FADEC internal circuit/memory fault, APU inlet door closing while APU is in run state.

10.

4 points

With APU battery in the ON position, the APU battery and RTRUs operate in parallel to start the APU. In this position the APU battery ISO contactor CLOSED light indicates _______________.

the APU starter is disengaged.

the aircraft and APU BECM has been bypassed.

the APU BECM has been bypassed.

the APU starter is engaged.

11.

4 points

What effect would having the aircraft on jacks, or two main landing gear cross knelled, or number 1 touchdown relay circuit breaker pulled have on the APU.

The audible horn will not sound

The APU low oil pressure switch will be overridden prohibiting low oil pressure protection and the APU fire warning audible horn will not sound

The APU door will not open fully and the audible horn will not sound

The APU low oil pressure switch will be overridden, prohibiting low oil pressure protection; the APU door will not open fully; the APU fire warning audible horn will not sound

12.

4 points

Normal ATM pumps pressure is

2850 - 3050 PSI

2800 - 3000 PSI

2800 - 3150 PSI

2850 - 3150 PSI

13.

4 points

If the APU gen fail light comes on during APU operation, what must you do ?

Place generator switch to off position

Place gen control switch to off and continue to operate Place gen control switch to off and continue to operate

Select the other APU generator

Immediately shut down the APU

14.

4 points

What position must the battery switch be in for a fire handle shutdown ?

Must be in NORM or STBY position, if modified by TCTO 1C-5-736 ON position

Must be in the OFF position, if modified by TCTO 1C-5-736 ON position

Must be in EXTERNAL PWR position, if modified by TCTO 1C-5-736 ON position

Must be in NORM position, if modified by TCTO 1C-5-736 ON position

15.

4 points

During APU start, which of the following EGT reading would indicate a malfunction?

691 - 715 C

325 - 575 C

600 - 691 C

716 - 824 C

16.

4 points

With external power connected and the APU battery is not installed, the APU may be started with the APU battery charger switch in the BYPASS provided ________________________.

the aircraft battery is removed

the aircraft battery is installed

the APU battery iso contactor closed

both RTRU's are available

17.

4 points

To prevent APU hot starts the accumulator pressure should be not less than __________ PSI.

3000

2700

2800

3150

18.

4 points

During APU start the "ON SPEED" Light comes on when?

95 percent plus 3 Seconds

90 percent plus 2 Seconds

90 percent plus 3 Seconds

95 percent plus 2 Seconds

19.

4 points

What is to be done if the battery voltage check shows less than 22.5 Volts in a battery ?

The battery should be monitored closely during APU operation

The battery shall be left connected but not used during APU operation

The battery should be charged from external power before it is used

The battery shall be replaced or the battery electrical plug shall be disconnected

20.

4 points

What must be operating before starting the ATM's to recharge the APU start accumulators ?

Bleed manifold pressure must be 50 psi

The electric suction boost pumps must be on

System pressure must be 300 psi

All power transfer switches must be on

21.

4 points

For cooling purposes, the APU should be run unloaded for _________ prior to shut down?

1 Minute

30 Seconds

2 Minutes

3 Minutes

22.

4 points

Which hydraulic systems are used to pressurize the APU accumulators?

Left APU accumulator from number 4 system and the right APU accumulator from number 1 system.

Left APU accumulator from number 3 system and the right APU accumulator from number 2 system

Left APU accumulator from number 2 system and the right APU accumulator from number 3 system.

Left APU accumulator from number 1 system and the right APU accumulator from number 4 system.

23.

4 points

APU cannot be started more than _______ time per hour.

4

3

5

2

24.

4 points

What must be available if the APU is to be operated with the compartment door open ?

A fireguard must be available with an APU tester

A fireguard with an adequate fire extinguisher must be at the compartment

A fireguard must be available with a two way radio

A fireguard with an adequate communication system must be at the compartment

25.

4 points

With the APU generator on and external power connected and on, the cross tie contactor switch in auto, the cross tie contactor light on the ac electrical control panel will be __________ ?

on indicating the cross tie is closed

off indicating the cross tie is closed

on indicating the cross tie is open

off indicating the cross tie is open

26.

4 points

During APU start, what is the maximum duration for transient EGT between 715 and 824 C ?

20 Seconds

No limit

30 Seconds

10 Seconds

27.

4 points

What is the location of the APU fire extinguisher bottle select switches?

Pilot's center instrument panel

Flight engineer's panel and loadmaster aft control panel

Flight engineer panel and loadmasters forward control panel

Loadmasters forward control panel and pilot's center panel

28.

4 points

What is the APUs' max start time from the start light to "ON SPEED", 0 and above?

20 Seconds

80 Seconds

30 Seconds

60 Seconds

29.

4 points

During operation of the ATM, a qualified operator will be located where ?

At the loadmaster's forward control panel

At the flight engineer's station

At the APU/ATM compartment door

At the pilot's position

30.

4 points

What is the max EGT during APU start?

799 deg's C

899 deg's C

>899 deg's C

>799 deg's C

31.

4 points

With the APU operating, what is the maximum EGT running limit?

692 deg's C

700 deg's C

>692 deg's C

630 deg's C

32.

4 points

To operate the ATMs, PTUs, or the engines pumps the number two and three main fuel tanks must have a minium of _______ lbs of fuel to provide case drain fluid cooling for the hydraulic systems.

4500 lbs

4000 lbs

2000 lbs

6500 lbs

33.

4 points

On initial start, with the compartment door open following APU fuel / oil system component removal or installation, a fire guard with a serviceable fire extinguisher will be required to leak check the APU during start. His / her duties are __________________________________.

During start, the fire guard will closely examine the APU for evidence of leaks (fuel, oil, or hydraulic).

The fire guard will be positioned at the APU station and will establish communication with the flight engineer's station.

If any leaks or substandard conditions are noted, the fire guard will notify the flight engineer's station. The start will be aborted and the leaks or substandard conditions corrected prior to attempting another start.

The fire guard will comply with all the above.

34.

4 points

When starting an APU without external power (battery start) what equipment must be available ?

A fire truck shall stand by during starting and single APU operation

A fireguard with a two way radio

A fireguard with a portable fire extinguisher

A fire truck shall stand by until power is available

35.

4 points

Where are the APU fire extinguisher bottles located on the aircraft ?

Inboard side of number 2 and number 3 engine pylons

In the lower aft corner of number 2 main landing gear wheelwell

In the right aft APU compartment

In the lower aft corner of number 4 main landing gear wheelwell

36.

4 points

During normal operation the APU generator ac loadmeter should not exceed which limit?

Loadmeter reading 1.0

Loadmeter reading 0.5

Loadmeter reading 1.50

Loadmeter reading 1.25

37.

4 points

With either APU generator supplying aircraft power, the operator will find all buses powered

except the monitor buses

except the number 2 and 3 dc buses

except number 2 and 3 main ac buses

except the dc powered buses