Engine Theory And Construction Test Questions

Question 1

Which law may you sum up with two words: action and reaction?

Answer 1

Newton’s third law of motion

Question 2

The ability to work is the definition of?

Answer 2

Energy

Question 3

Which type of horsepower determines the performance of the engine- propeller combination?

Answer 3

Equivalent shaft

Question 4

What two fluids combined are used to make up common jet fuel?

Answer 4

Kerosene and gasoline

Question 5

What are the three method of heat transfer?

Answer 5

Radiation, convection, and conduction

Question 6

Where is the highest point of temperature reached in the engine?

Answer 6

Combustion section

Question 7

On an average, what percent of all the energy produced by the fuel is required to maintain the engine operating cycle?

Answer 7

60

Question 8

What directs the gases onto the first stage turbine wheel blades in a jet engine?

Answer 8

Turbine stator

Question 9

Vane-type fuel pumps used on jet engines are similar to?

Answer 9

Sliding vane air compressors

Question 10

Which condition reduces efficiency of a centrifugal compressor?

Answer 10

Pressure pulsations

Question 11

Stationary vanes are positioned between rotor discs in a compressor are used to?

Answer 11

Direct air and increase pressure

Question 12

What is the most probable cause of a flameout of an engine flying at 40,000 feet with a constant rpm of 50 percent?

Answer 12

The rpm is to low

Question 13

What are three adjectives to describe carbon monoxide?

Answer 13

Poisonous, odorless, and colorless

Question 14

What is the most chemically correct ratio for burning fuel in a combustion chamber?

Answer 14

15:1

Question 15

What type of flame speed are swirl-type fuel nozzles normally used to provide?

Answer 15

High

Question 16

What is placed in front of the rotating blades in a multi-stage turbine engine?

Answer 16

Turbine nozzle vane assembly

Question 17

The exhaust duct connects the turbine outlet and the?

Answer 17

Jet nozzle

Question 18

What is the purpose of the exhaust duct?

Answer 18

Straighten exhaust gas flow

Question 19

Which component in the augmentor creates local turbulence and reduces gases velocity?

Answer 19

Flameholder

Question 20

Which type of defect appears on bearings as a result of of bearing parts striking together?

Answer 20

Nicks

Question 21

Which type of defect appears on bearing as a result of small particles of foreign material becoming lodged between the rollers?

Answer 21

Grooves

Question 22

Which type of bearing defect results from inadequate lubrication?

Answer 22

Galling

Question 23

Which component reduces the engine rotor speed to the rpm required for accessories?

Answer 23

Reduction geartrain

Question 24

To cause an accessory in a jet engine to operate at its most optimum speed, designer engineers must?

Answer 24

Change the gear ratio

Question 25

When the engine is running above 23 percent rpm, the propeller brake is held in the release position by?

Answer 25

Reduction gearbox RGB system oil pressure

Question 26

The purpose of the T56 safety coupling is to?

Answer 26

Disconnect the power section from the reduction gear box (RGB) assembly

Question 27

For the safety coupling to disconnect the power unit from the reduction gearbox (RGB), torque must be between?

Answer 27

-4,200 and -7,200 inch pounds

Question 28

The torque shaft can recouple to the RGB if torque decreases below approximately?

Answer 28

-6,000 inch pounds

Question 29

The type of bearings used to support the T56 compressor rotor at the front and rear include the?

Answer 29

Roller on the front and ball on the rear

Question 30

What supports the entire weight of the T56 turbine section?

Answer 30

Combustion section outer case

Question 31

What is the purpose of the turbine section?

Answer 31

Convert energy into torque

Question 32

What are used to retain the turbine buckets in the first stage wheel T56-A-15 engine?

Answer 32

Cover plate seals

Question 33

What does the bottom surface of the AE2100D3 air inlet housing provide the mounting pad for?

Answer 33

Power unit accessory drive (PUAD)

Question 34

What is the AE2100D3 power unit accessory drive (PUAD) mounted on the bottom of?

Answer 34

Forward end of the compressor air inlet housing

Question 35

What does the T700 A-sump output shaft assembly provides a mounting surface for?

Answer 35

No. 1 and No. 2 bearing

Question 36

F108 structural rigidity is obtained with a short length and by having only two main structures that are called?

Answer 36

Mainframes

Question 37

What percentage of the total engine thrust does the secondary airflow on the F108 engine produce?

Answer 37

80

Question 38

On the F108, what does the LPT shaft assembly connect the fan shaft to?

Answer 38

LPT rotor

Question 39

Which accessory is not found on the F108 AGB?

Answer 39

Augmentor pump

Question 40

On an F100-PW-220 engine, which stages of the compressor stator vanes are variable?

Answer 40

Fourth and fifth

Question 41

What stage of compressor air provides anti-icing to the inlet guide vanes of the F119-PW-100 engine?

Answer 41

9th

Question 42

Where is the total temperature sensor (Tt2) located on a F119-PW-100 engine?

Answer 42

Inside the inlet guide vane case at the 5:30 position

Question 43

How many stages are on the high pressure compressor of a F119-PW-100 engine?

Answer 43

6

Question 44

On the F119-PW-100 engine, what provides attaching points for the actuator fuel pump, main fuel pump, engine generator/breather pressurizing valve attached to the front, ODI gang drain, two chip detectors at 4:00 position, lubrication system and scavenge pump with two chip detectors, oil servicing and overfill adapter, oil flow management valve, and oil level sensor?

Answer 44

The gearbox assembly

Question 45

How many fuel nozzles are in the augmentor assembly of the F119-PW-100 engine?

Answer 45

16