Engine System Review Questions

Question 1

The T-56-A-14 engine is rated at ____ SHP.

Answer 1

4600

NATOPS 2.9

Question 2

The 6 uses of 14th stage bleed air include: engine starting, engine anti-icing, wing deicing, oil cooling augmentation, bomb bay heating, and:

Answer 2

closing the 5th and 10th stage bleeds.

WEEBOC

NATOPS 2.9.2

Question 3

Fourteenth stage bleed air is tapped off the ____ section.

Answer 3

compressor

NATOPS 2.9.2

Question 4

The ignitors are in:

Answer 4

cans 2 and 5

NATOPS 2.9.3

Question 5

Of all the airflow entering the combustion section, approximately percent is used for combustion.

Answer 5

25%

NATOPS 2.9.3

Question 6

The 18 thermocouples mounted in each engine turbine inlet casing send a signal to the ____.

Answer 6

TIT indicator and temperature datum control

NATOPS 2.9.12.2

Question 7

The turbine section consists of ____ stages.

Answer 7

Four

NATOPS 2.9.4

Question 8

The engine accessory section is mounted on and driven by gearing from the ____ section.

Answer 8

compressor

NATOPS 2.9.5

Question 9

The equipment mounted on the compressor accessory section are the engine fuel pump, the main oil pump, the speed sense control, the scavenge oil pump, the:

Answer 9

fuel control unit, the oil filter, and the speed sense valve.

NATOPS 2.9.5

Question 10

The reduction gearbox reduces ____ of the power section to ____ for use by the propeller.

Answer 10

high RPM, low torque; low rpm, high torque

NATOPS 2.9.6

Question 11

The torquemeter assembly transmits torque from the power section to the reduction gear assembly, provides the primary support structure between the power unit and the RGB, and:

Answer 11

displays SHP on the indicators in the flight station.

NATOPS 2.9.7

Question 12

Shaft horsepower gauges are powered by ____.

Answer 12

MEAC

NATOPS Fig. 2-5

Question 13

The TIT gauges are powered by ____.

Answer 13

SEAC

NATOPS Fig. 2-5

Question 14

The fuel flow gauges are powered by ____.

Answer 14

Bus A

NATOPS Fig. 2-5

Question 15

Each engine oil system take has a useable capacity of ____ U.S. gallons.

Answer 15

8.65

NATOPS 2.9.14.1

Question 16

Engine oil cooling augmentation requires the oil cooler door be fully opened, the power lever below flight idle, and

Answer 16

the start selector off.

NATOPS 2.9.14.3

Question 17

The electrical functions of the emergency shutdown handle are controlled by electrical wiper switches, activated by the E-Handle, and powered by:

Answer 17

MEDC

NATOPS 2.9.10

Question 18

If a fire warning sensing element is broken, the system will:

Answer 18

still sense a fire up to both sides of the break, but will not test.

NATOPS 2.9.13.1

Question 19

Each engine fire extinguishing bottle simultaneously receives power from two independent sources. They are:

Answer 19

EMDC and MEDC

NATOPS 2.9.13.2

Question 20

The ignitors operate:

Answer 20

between 16% and 65% engine rpm.

NATOPS 2.9.9.3

Question 21

The purpose of the 5th and 10th stage bleed valves is to:

Answer 21

unload the compressor during engine acceleration

NATOPS 2.9.9.6

Question 22

The 16% switch on the speed sense control opens the fuel shutoff valve, energizes the igniters, energizes the fuel drain manifold solenoid, and:

Answer 22

energizes the paralleling valve solenoid to put the fuel pumps into parallel.

NATOPS 2.9.9.3

Question 23

The 94% switch on the speed sense control:

Answer 23

changes the TD system from start limiting to temperature limiting.

NATOPS 2.9.9.5

Question 24

The speed sensitive valve:

Answer 24

closes the 5th and 10th stage bleed air ports at 94%

NATOPS 2.9.9.6

Question 25

The starting system requires a stabilized air source that must maintain a minimum of ___ psi at 16% RPM

Answer 25

25 NATOPS 2.9.9.1, 8.5

Question 26

The engine starter uses ____ from the ____ to provide engine rotation during a normal start.

Answer 26

compressed air; APU, an operating engine, or an external gas turbine compressor NATOPS 2.9.9.1

Question 27

The paralleling valve solenoid in the engine fuel system is energized by:

Answer 27

the ignition relay at 16% NATOPS 2.9.9.3

Question 28

The fuel manifold drain valve is closed:

Answer 28

electrically at 16% and is held closed by fuel pressure above 65% RPM NATOPS 2.9.9.3

Question 29

A CHIPS light indicates metal particles on a plug in the:

Answer 29

engine power section and/or the reduction gearbox NATOPS 2.9.12.9

Question 30

Maximum allowable oil pressure fluctuation in the power section at 100% RPM is ____ psi, provided pressure remains within limits.

Answer 30

+-5 NATOPS Fig 4-2

Question 31

The maximum time for operation of the T56-14 engine at 1077 TIT is ___ minutes.

Answer 31

5 NATOPS Fig 4-2

Question 32

Maximum TIT in normal rpm at ground start is

Answer 32

645 C NATOPS Fig 4-2

Question 33

In normal rpm, normal gearbox oil pressure is __ to 250 psi.

Answer 33

150 NATOPS Fig 4-2

Question 34

Maximum allowable oil pressure fluctuation in the reduction gearbox at 100% rpm is psi, provided pressure remains within limits.

Answer 34

+-20 NATOPS Fig 4-2

Question 35

Reduction gearbox oil pressure limits are 150-250 psi. Operation:

Answer 35

below 150 psi when below 100% rpm is permitted NATOPS Fig 4-2

Question 36

After returning to a positive g condition, following negative g flight, shut down the engine if oil pressure fluctuates for more than ___ seconds.

Answer 36

15 NATOPS Fig 4-2

Question 37

In flight, oil pressure limits in the power section are ____ psi.

Answer 37

50-60 NATOPS Fig 4-2

Question 38

Under extremely cold weather conditions, you may operate an engine with oil temperatures between 50-60C provided:

Answer 38

all oil pressure limitations are maintained. NATOPS Fig 4-2

Question 39

With an engine oil temperature of +25C, the maximum allowable SHP is:

Answer 39

1000 NATOPS Fig 4-2

Question 40

With LOW rpm slected, a properly adjusted fuel control will maintain engine rpm between:

Answer 40

71.0-73.8 NATOPS Fig 4-2

Question 41

After being shifted to NORMAL rpm and the power lever at 15 degrees coordinator, the engine rpm should be ___

Answer 41

96.3-99.1 NATOPS Fig 4-2

Question 42

Torquemeter "flop over" can occur with too rapid an application of power. This means that at least ___ SHP has been momentarily exceeded and the engine shall be ____.

Answer 42

5300; inspected as soon as possible NATOPS 4.3

Question 43

Maximum power may be applied for takeoff provided:

Answer 43

oil temperature is 40C and rising with no fluctuations in the gearbox oil pressure NATOPS Fig 4-2

Question 44

After executing a max power takeoff (1077 TIT), you must retard the power lever within ___ mins.

Answer 44

5 NATOPS Fig 4-2