Engine Exhaust & Reverser Sys-Powerplant

1 (8846) - Why is high nickel chromium steel used in many exhaust systems?

B- Corrosion resistance and low expansion coefficient.

2 (8847) - Reciprocating engine exhaust system designs commonly used to provide for ease of installation and/or allow for expansion and contraction, may include the use of 1. spring loaded ball/flexible joints.2. slip joints.3. bellows.4. flexible metal tubing.

C- 1, 2, and/or 3.

3 (8848) - One source commonly used for carburetor air heat is

C- exhaust gases.

4 (8849) - The hot section of a turbine engine is particularly susceptible to which of the following kind of damage?

C- Cracking.

5 (8850) - What is the purpose of a slip joint in an exhaust collector ring?

A- It aids in alignment and absorbs expansion.

6 (8851) - Sodium-filled valves are advantageous to an aviation engine because they

C- dissipate heat well.

7 (8852) - What type of nuts are used to hold an exhaust system to the cylinders?

A- Brass or heat-resistant nuts.

8 (8853) - Repair of exhaust system components

C- is not recommended to be accomplished in the field.

9 (8854) - On turbojet powered airplanes, thrust reversers are capable of producing between

A- 35 and 50 percent of the rated thrust in the reverse direction.

10 (8855) - On an aircraft that utilizes an exhaust heat exchanger as a source of cabin heat, how should the exhaust system be inspected?

C- With the heater air shroud removed.

11 (8856) - How should ceramic-coated exhaust components be cleaned?

B- By degreasing.

12 (8857) - Which of the following indicates that a combustion chamber of a jet engine is not operating properly?

B- Hot spots on the tail cone.

13 (8858) - Select a characteristic of a good weld on exhaust stacks.

C- The weld should taper off smoothly into the base metal.

14 (8859) - How do the turbines which are driven by the exhaust gases of a turbo-compound engine contribute to total engine power output?

A- By driving the crankshaft through suitable couplings.

15 (8860) - How should corrosion-resistant steel parts such as exhaust collectors be blast cleaned?

C- Use sand which has not previously been used on iron or steel.

16 (8861) - Power recovery turbines used on some reciprocating engines are driven by the

C- velocity of the exhaust gases.

17 (8862) - Reciprocating engine exhaust systems that have repairs or sloppy weld beads which protrude internally are unacceptable because they cause

C- local hot spots.

18 (8863) - Ball joints in reciprocating engine exhaust systems should be

C- loose enough to permit some movement.

19 (8864) - All of the following are recommended markers for reciprocating engine exhaust systems except

B- lead pencil.

20 (8865) - How are combustion liner walls cooled in a gas turbine engine?

A- By secondary air flowing through the combustion chamber.

21 (8866) - Augmenter tubes are part of which reciprocating engine system?

B- Exhaust.

22 (8867) - Dislodged internal muffler baffles on a small reciprocating engine may

A- obstruct the muffler outlet and cause excessive exhaust back pressure.

23 (8868) - What is the purpose of an exhaust outlet guard on a small reciprocating engine?

A- To prevent dislodged muffler baffles from obstructing the muffler outlet.

24 (8869) - What could be a result of undetected exhaust system leaks in a reciprocating engine powered airplane?

A- Pilot/passenger incapacitation caused by carbon monoxide entering the cabin.

25 (8870) - How may reciprocating engine exhaust system leaks be detected?

C- Signs of exhaust soot inside cowling and on adjacent components.

26 (8871) - Compared to normally aspirated engines, turbocharged engine exhaust systems operate at

B- higher temperatures and higher pressures.

27 (8872) - Most exhaust system failures result from thermal fatigue cracking in the areas of stress concentration. This condition is usually caused by

C- the high temperatures at which the exhaust system operates.

28 (8873) - Thrust reversers utilizing a pneumatic actuating system usually receive operating pressure from

A- the engine bleed air system.

29 (8874) - Operating thrust reversers at low ground speeds can sometimes cause 1. sand or other foreign object ingestion.2. hot gas re-ingestion.3. compressor stalls.

A- 1, 2, and 3.

30 (8875) - Engines using cold stream, or both cold and hot stream reversing include

A- high bypass turbofans.

31 (8876) - The purpose of cascade vanes in a thrust reversing system is to

C- turn to a forward direction the fan and/or hot exhaust gases that have been blocked from exiting through the exhaust nozzle.

32 (8877) - Turbojet and turbofan thrust reverser systems are generally powered by 1. fuel pressure.2. electricity.3. hydraulic pressure.4. pneumatic pressure.

B- 2, 3, and 4.

33 (8878) - The rearward thrust capability of an engine with the thrust reverser system deployed is

A- less than its forward capability.

34 (8879) - Which statement is generally true regarding thrust reverser systems?

A- It is possible to move some aircraft backward on the ground using reverse thrust.

35 (8880) - What is the proper operating sequence when using thrust reversers to slow an aircraft after landing?

B- Retard thrust levers to ground idle, raise thrust reverser levers as required, and retard thrust reverser levers to ground idle.