SO1113 Engines (part 1)

Question 1

How many pounds of thrust do each engine produce and MIL and AB?

Answer 1

2200 (MIL) and 3300 (AB)

Question 2

The function of the ______ is to is to direct the the flow of air into the first stage compressor blades at the proper angle

Answer 2

front frame

Question 3

True or false: The compressor section consists of eight stages that form a convergent duct that compresses and accelerates the air rearward to supply compressed air to the combustion section

Answer 3

true

Question 4

Low pressure air from an external starting unit is directed against the __________ to rotate the engine for ground starts

Answer 4

turbine rotors

Question 5

The afterburner accelerates the turbine exhaust gasses to a higher velocity and increases the thrust produced by approximately how many percent?

Answer 5

5 to 40 percent

Question 6

From what section of the engine does the bleed air that is used for the engine anti-ice and the aircraft pneumatic system come from?

Answer 6

The compressor section

Question 7

At what RPM setting does the T5 take over to hold the EGT within 630 - 650 degrees C?

Answer 7

97% RPM

Question 8

What is the primary purpose of the air bleed valves?

Answer 8

To allow compressed air to escape to help prevent compressor stalls at low RPM

Question 9

True or false: The tachometer (RPM) has its own generator and operates independently from the A/C electrical system

Answer 9

True

Question 10

What purpose do the variable inlet guide vanes and air bleed valves serve?

Answer 10

Reduce the possibility of compressor stalls.

Question 11

The T-38C anti-ice system prevents ice from forming on:

Answer 11

the inlet guide vanes and bullet nose.

Question 12

How will the anti-ice system be affected with an AC power failure?

Answer 12

Anti-ice will be fully effective on any engine above 80% RPM.

Question 13

What is the purpose of the variable exhaust nozzle?

Answer 13

Maintains maximum thrust efficiency while controlling EGT.

Question 14

Under what atmospheric conditions should you use the anti-ice system?

Answer 14

When temperature is near or below 32 °F and/or when flying at an altitude above FL290.

Question 15

The primary advantage of using an afterburner in engine design is:

Answer 15

high thrust for low weight.

d. compressor section supplies more

Question 16

How can you be relatively sure the T5 system on a particular engine is working?

Answer 16

Observe EGT indications between 630 – 650 °C in MAX power. Check to see the nozzles open while advancing the throttle from 97% RPM to MIL power.

Question 17

What electrical source is required to operate the T5 system?

Answer 17

An independent AC T5 alternator

Question 18

What is the correct nozzle position for military power?

Answer 18

0 to 20%

Question 19

If a sudden change of ________ psi or greater in oil pressure indication occurs at any stabilized RPM, follow the
engine oil system malfunction procedures in Section III of the T-38C checklist.

Answer 19

10 PSI