POWERPLANT- GENERAL

Question 1

What does the term ‘powerplant’ refer to in aviation?

Answer 1

The engine and associated components

Question 2

What is the primary purpose of an aircraft powerplant?

Answer 2

To provide the necessary thrust to propel the aircraft

Question 3

What is ‘thrust’ in the context of an aircraft engine?

Answer 3

The force generated by the engine to move the aircraft forward

Question 4

In a reciprocating engine, what does the term ‘stroke’ refer to?

Answer 4

The movement of the piston from top to bottom

Question 5

What is the main disadvantage of using a reciprocating engine in aircraft?

Answer 5

Low power-to-weight ratio

Question 6

What is the purpose of an engine cowling?

Answer 6

Reduce drag and aid in cooling

Question 7

Which type of fuel is typically used in reciprocating engines?

Answer 7

Avgas

Question 8

Which type of fuel is typically used in jet engines?

Answer 8

Jet-A

Question 9

Which type of engine uses a propeller to generate thrust?

Answer 9

Turboprop

Question 10

Which type of engine is most commonly used in commercial airliners?

Answer 10

Turbofan engine

Question 11

What is the main function of an aircraft engine’s oil system?

Answer 11

Lubricate moving parts

Question 12

What does the term ‘specific fuel consumption’ refer to?

Answer 12

The fuel required to produce a unit of thrust

Question 13

What is a turbojet engine primarily used for?

Answer 13

High-speed and high-altitude flight

Question 14

What is the primary purpose of using fuel additives in aviation fuels?

Answer 14

To prevent corrosion and icing

Question 15

According to FAA regulations, what color is 100LL aviation gasoline (AVGAS)?

Answer 15

Blue

Question 16

Regulations state that fuel system icing inhibitors must be added to which type of fuel?

Answer 16

Jet-A

Question 17

What does the term ‘compressor stall’ refer to in a jet engine?

Answer 17

Momentary loss of airflow through the compressor

Question 18

Which type of turbine is commonly used in modern jet engines?

Answer 18

Axial-flow turbine

Question 19

What does the term ‘bypass ratio’ refer to in a turbofan engine?

Answer 19

Ratio of bypassed air to engine core air

Question 20

What is the primary advantage of using a turbofan engine over a turbojet engine?

Answer 20

Better fuel efficiency

Question 21

What is the purpose of an oil cooler bypass valve in an aircraft engine?

Answer 21

Bypass oil when it is cold

Question 22

Which type of turbine engine uses both axial and centrifugal compressors?

Answer 22

Turboshaft

Question 23

What is the purpose of a fire sleeve in an aircraft engine?

Answer 23

Protect fuel lines from heat and flames

Question 24

What is the purpose of the diffuser in a centrifugal compressor?

Answer 24

Convert kinetic energy into pressure

Question 25

What is the primary purpose of the induction system in an aircraft engine?

Answer 25

Supply air to the engine

Question 26

What is the function of a fuel vapor separator in an aircraft fuel system?

Answer 26

Separate air from fuel

Question 27

What is the primary purpose of oil additives in aircraft engines?

Answer 27

To enhance lubrication and reduce wear

Question 28

The primary purpose of an engine oil cooler is to:

Answer 28

Maintain optimum oil temperature

Question 29

What is the function of a fuel pump in an aircraft fuel system?

Answer 29

To pressurize and deliver fuel to the engine

Question 30

What is the function of a de-icing boot on an aircraft engine?

Answer 30

Remove ice from the propeller and engine surfaces

Question 31

What does the term 'stoichiometric mixture' refer to in engine operation?

Answer 31

An ideal fuel-to-air ratio for complete combustion

Question 32

What is the main purpose of the engine oil system?

Answer 32

To reduce friction between moving parts

Question 33

Which of the following checks before each flight regarding engine oil?

Answer 33

Oil level

Question 34

What is the purpose of an oil cooler in an aircraft engine?

Answer 34

To cool the oil before it returns to the engine

Question 35

What is 'compressor stall' in a jet engine?

Answer 35

The disruption of airflow through the compressor causing a loss of compression

Question 36

What is the primary function of an engine fire detection system?

Answer 36

To alert the pilot of a potential fire hazard

Question 37

How is the power output of a reciprocating engine typically measured?

Answer 37

In horsepower

Question 38

What does 'TSO' stand for in aviation maintenance?

Answer 38

Technical Standard Order

Question 39

What is the function of a 'scavenge pump' in a lubrication system?

Answer 39

To return oil to the oil tank from various parts of the engine

Question 40

How does the pilot control the aircraft's engine power?

Answer 40

Using the throttle