Power Plant (Engine)

Question 1

Approximately ______% of the total airflow into combustion section of the C20J engine is required for combustion. The remaining air used as cooling air and to drive 5 bleed air accessories

Answer 1

20-25

Question 2

During the start sequence, the spark from the ignitor plug will cease _________

Answer 2

When the starter button is released

Question 3

The gas turbine principles take advantage of what kind of forces?

Answer 3

Impact & amp; Reaction

Question 4

Which statement best describes the model 250 C20J turbine engine?

Answer 4

Internal combustion gas turbine engine featuring a free power turbine

Question 5

The 5th stage bleed air control valve provides what two functions?

Answer 5

Aids in rapid engine accelearation, helps prevent compressor stall

Question 6

The LOW INPUT PRESSURE caution light indicates that

Answer 6

The air barrier filter is clogged

Question 7

The ____ _____ principle, used to design the C20J engine, takes advantage of the impact and reaction of combustion gasses passing through turbine blades and rotors

Answer 7

Gas turbine

Question 8

How are the gas producer fuel control and governor integrated?

Answer 8

By pneumatic means

Question 9

How is droop compensated for on the C20J turbine engine?

Answer 9

Through mechanical linkage, electrical components, and pneumatic means

Question 10

What is designed to reduce the high RPM required for hp development to a more practical RPM at the output pads?

Answer 10

2 separate gear twins

Question 11

The C20J engine compressor section provides _ ____ stages of compression and _ _____ stage(s) of compression

Answer 11

6 axial, 1 centrifugal

Question 12

Which TH-67 engine instruments are considered to be wet line instrument?

Answer 12

Engine oil pressure, torque

Question 13

High RPM produced by turbine engines are reduced to useable levels by?

Answer 13

2 separated gear trains

Question 14

The Air Barrier Filter, installed forward of the compressor front support hub, is designed to

Answer 14

Provide clean, particle free air to the compressor

Question 15

The ______ ____ on the C20J engine is driven by the N2 power turbine gear train

Answer 15

Torque meter

Question 16

What are the advantages of the free power turbine engine?

Answer 16

Reduced load, each turbine operates at optimum RPM capacity

Question 17

Which engine bearings are extremely lubricated?

Answer 17

1, 6, 7, 8

Question 18

The Engine Chip light will illuminate if?

Answer 18

Sufficient ferrous material contacts the magnetic chip detector

Question 19

How many different chip detectors can activate the ENG CHIP caution light?

Answer 19

2

Question 20

What are the 4 sections of the 250-C20J turbine engine?

Answer 20

The compressor, power and accessory gearbox, turbine, and combustion

Question 21

What is used to secure the engine to the aircraft?

Answer 21

3 bipod mounts

Question 22

There are _ bipod mounts that are used to ____ mount the engine.

Answer 22

3, rigidly

Question 23

What are the elements required to start the engine?

Answer 23

Spark, air, fuel

Question 24

What is the indication that the Engine Barrier Filter is clogged?

Answer 24

LOW INLET PRESSURE caution light is illuminated

Question 25

The decrease in N2 RPM that exits between the time a demand for power is made and the time power is delivered is known as?

Answer 25

Droop

Question 26

Which engine section is driven by the N1 gear train?

Answer 26

Compressor

Question 27

Where is engine’s internal temperature measured?

Answer 27

As the gases exit the N1 turbine rotor

Question 28

The ____ ____ ____ on the C20J engine is driven by the N1 gas producer gear train

Answer 28

Engine oil pump