unit 2

Question 1

To be considered effective tools for aviators, aircraft instruments must be light weight, easy to read and

Answer 1

be small in size

Question 2

Understanding the operating principles of engine instruments help you decide

Answer 2

the meaning of the instrument readings

Question 3

Most engine-monitoring gauges and instruments require some type of

Answer 3

transmitter and indicator

Question 4

Which jet engine temperature is not measured

Answer 4

combustion inlet

Question 5

A typical jet engine EGT indicating system contains thermocouples, leads, an indicator, and

Answer 5

a resistor

Question 6

Which metals are used in the EGT indicating system thermocouples?

Answer 6

Alumel and chromel

Question 7

Most jet-powered aircraft engine fuel-flow indicating systems contain a fuel-flow

Answer 7

transmitter and fuel-flow indicator

Question 8

The fuel-flow indicator indicates the rate of fuel flow as

Answer 8

pounds per hour

Question 9

The oil pressure indicator receives an electrical signal from the

Answer 9

transmitter

Question 10

The tachometer indicating system’s two primary units are the tachometer generator and tachometer

Answer 10

indicator

Question 11

The N2 tachometer generator is usually driven from the tachometer drive located on the

Answer 11

engine accessory section

Question 12

The tachometer generator’s frequency is proportional to the

Answer 12

engine speed

Question 13

What converts the exhaust nozzle’s position on engines with afterburners into an electrical signal?

Answer 13

Transducer

Question 14

One type of overheat detector unit used on aircraft engines consists of a hollow stainless-steel tube that covers

Answer 14

two silver contacts

Question 15

For an operational check of the fire warning system, you press

Answer 15

only the TEST switch

Question 16

What indicates the amount of thrust a dual-compressor engine is producing?

Answer 16

EPR

Question 17

The term Pt2 means the

Answer 17

total (t) pressure (P) at station 2 (2)

Question 18

How is inlet PT2 transmitted from its sensing point?

Answer 18

Through tubing

Question 19

When connected to an engine oil pressure line the direct oil pressure gauge on a test cell indicates oil pressure without using wiring, indicator, or

Answer 19

aircraft transmitter

Question 20

The test cell’s EGT selector allows selecting

Answer 20

individual thermocouple inputs or an average of these inputs

Question 21

The test cell fuel-flow rate indicator automatically controls the fuel module’s solenoid valves in order to divert fuel flow through the

Answer 21

flow turbines

Question 22

The display range of the test cell IC temperature indicator is

Answer 22

-50 to +1,600 degree F

Question 23

What engine vibration usually causes the most concern?

Answer 23

Forced

Question 24

What type of vibration causes unnecessary engine removals and unwarranted repairs?

Answer 24

externally excited

Question 25

What engine vibration does not persist, but comes and goes?

Answer 25

Transient

Question 26

In vibration analysis, frequency is usually measured in

Answer 26

cycles per second

Question 27

Which type of vibration transducer is made of certain ceramic compounds and natural crystals?

Answer 27

Piezoelectric accelerometer

Question 28

Where do you find the instructions for installing vibration pickups at the test cell?

Answer 28

Intermediate maintenance manual

Question 29

When using a vibration analyzer how are you notified when a preset signal has been exceeded?

Answer 29

A flashing channel indicator LED

Question 30

What supports the fan and low-pressure turbine?

Answer 30

Bearings

Question 31

What procedure ensures that the fan and low-pressure turbine are correctly balanced?

Answer 31

Fan rotor trim balance