unit 1

Question 1

An aircraft taxing at a steady speed can be used to demonstrate

Answer 1

Newton’s first law of motion

Question 2

Newton’s third law of motion explains why an operating jet engine produces

Answer 2

forward thrust

Question 3

Which type of duct would decrease the velocity and increase the pressure of a gas as it passes through?

Answer 3

Divergent

Question 4

“The combination of decreased pressure about an airfoil, and the increased pressure below the airfoil produces life” is best described by

Answer 4

Bernoulli’s principle

Question 5

Foot-pounds and inch0pounds are units of measure for

Answer 5

work

Question 6

What does fuel for an engine represent?

Answer 6

Potential energy

Question 7

Which section of a jet engine continually supplies air and maintains pressure?

Answer 7

Compressor

Question 8

The temperature of compressed air in a jet engine must be raised to

Answer 8

increase energy

Question 9

Which section of a jet engine introduces and burns fuel?

Answer 9

Combustion

Question 10

How many British thermal units (Btu) does the heat content per pound of kerosene produce?

Answer 10

18,500

Question 11

The efficiency of a jet engine is often referred to as

Answer 11

thermal efficiency

Question 12

The product of thermal efficiency and propulsive efficiency is

Answer 12

overall efficiency

Question 13

To measure barometric pressure, you would use a

Answer 13

Barometer

Question 14

What effect does moisture content or humidity have on density of air?

Answer 14

More moisture, less dense

Question 15

Due to the divergent design of a diffuser, air pressure

Answer 15

Increases

Question 16

The air temperature of a jet engine gradually rises across the compressor to the diffuser outlet as a result of

Answer 16

compression

Question 17

Where is the highest point of temperature reached in an engine

Answer 17

Combustion section

Question 18

Which engine component meters fuel for combustion?

Answer 18

Fuel control

Question 19

What happens to the energy that is absorbed by the turbine wheel?

Answer 19

It is returned to the compressor

Question 20

What is the required velocity for air and gases flowing through a jet engine?

Answer 20

Greater velocity exiting than entering

Question 21

The velocity of the stream of air that flows through a jet engine reaches it highest point at the

Answer 21

ejector nozzle

Question 22

What is the general flow of gases from the combustion chamber?

Answer 22

Parallel to the axis of the rotor shaft

Question 23

Gases enter the jet-engine’s first-stage turbine wheel blades from the

Answer 23

turbine stator

Question 24

When two or more turbine wheels are used in a jet engine, which component is places directly in front of each turbine wheel?

Answer 24

Turbine stator (nozzle diaphragm)