Vol.3

Question 1

What is the primary function of a hydromechanical fuel control on a jet engine?

Answer 1

To meter the fuel, making certain that the engine gets the correct quantity for combustion at all times

Question 2

What type of fuel control uses thermocouples, relays, amplifiers, and solenoids, to help control the engine?

Answer 2

Electrohydromechanical

Question 3

What is the purpose of a fuel/oil cooler in a fuel system?

Answer 3

Heat the fuel and cool the oil

Question 4

When classified according to structure, which of the following is not a type of an oil pump?A. GearB. GerotorC. RotogearD. Sliding vane

Answer 4

C. Rotogear

Question 5

What jet engine oil pump consists of a gear and a rotor within a housing?

Answer 5

Gerotor

Question 6

A micron is a metric linear measurement equal to what?

Answer 6

1/25,000 of an inch

Question 7

What are the two types of oil coolers used in jet engine oil systems?

Answer 7

Air/oil and fuel/oil

Question 8

What is used to create a static seal between two stationary parts in the oil system?

Answer 8

Gasket

Question 9

What engine component must be rotated to a predetermined speed in order for a jet engine starter to be considered effective?

Answer 9

Compressor

Question 10

What are the advantages of an air turbine (impingement) starter used on jet engines?

Answer 10

Less weight and fewer moving parts than other starters

Question 11

The cartridge-pneumatic starter is a gas-driven turbine wheel coupled to the engine through a reduction gear system and what?

Answer 11

An overrunning clutch

Question 12

In a gearbox-type starter system, what transmits the torque supplied by the jet fuel starter to the engine gearbox?

Answer 12

Power takeoff shaft

Question 13

What jet engine AC ignition system unit develops 20,000 volts delivered to the igniter plugs?

Answer 13

Transformer

Question 14

What does a simple DC ignition system consist of?

Answer 14

A vibrator, igniter plugs, and transformer

Question 15

What are jet engine tachometer gauges calibrated in?

Answer 15

Percent of maximum RPM

Question 16

What is the purpose of the jet engine pressure ratio indicating system?

Answer 16

To give a reference to the engine’s available thrust output

Question 17

What does the exhaust gas temperature indicators indicate?

Answer 17

Engine EGT in degrees Celsius

Question 18

What are the three benefits of the Joint Oil Analysis Program?

Answer 18

Improved safety, reduced maintenance cost, and increased equipment availability

Question 19

Through the use of spectrometric oil analysis, why will aircraft have a higher in-commission rate?

Answer 19

There will be less unnecessary maintenace

Question 20

At a minimum, what should be worn when taking an oil sample?

Answer 20

Gloves and goggles

Question 21

What indicates lubricant system contamination by dirt and sand?

Answer 21

An increase in silicon

Question 22

What form must be filled out and submitted to the non-destructive inspections laboratory with all oil samples?

Answer 22

DD Form 2026