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Engine Exhaust W

FAA Exhaust Written Questions/Answers

QuestionAnswer
On a reciprocating engine aircraft using a shrouded exhaust muffler system as a source for cabin heat, the exhaust system should be Visually inspected for any indication of cracks or an operational carbon monoxide detection test should be done.
Why is nickel chromium steel used in many exhaust systems? Corrosion resistance and low expansion coefficient
Reciprocating engine exhaust system designs commonly used to provide for ease of installation and/or allow for expansion and contraction, may include use of 1. Spring loaded ball/flexible joints, 2. Slip joints, 3. Bellows
What is the purpose of a slip joint in an exhaust collector ring? It aids in alignment and absorbs expansion
What type nuts are used to hold an exhaust system to the cylinders? Brass or heat resistant nuts.
Repair of exhaust system components is not recommended to be accomplished in the field
On an aircraft that utilizes an exhaust heat exchanger as a source of cabin heat, how should the exhaust system be inspected? With the heater air shroud removed
How should ceramic coated exhaust components be cleaned? By degreasing
Select a characteristic of a good weld on exhaust stacks The weld should taper off smoothly into the base metal
How should corrosion resistant steel parts such as exhaust collectors be blast cleaned? Use sand which has not previously been used on iron or steel.
Reciprocating engine exhaust systems that have repairs or sloopy weld beads which protrude internally are unacceptable because they cause local hot spots
Ball joints in reciprocating engine exhaust systems should be loose enough to permit some movement
All of the following are recommended markers for reciprocating engine exhaust systems except lead pencil
Augmenter tubes are part of which reciprocating engine system? Exhaust
Dislodged internal muffler baffles on a small recip engine may obstruct the muffler outlet and cause excessive exhaust back pressure
What is the purpose of an exhaust outlet guard on a small reciprocating engine? To prevent dislodged muffler baffles from obstructing the muffler outlet
What could be a result of undetected exhaust system leaks in a reciprocating engine powered airplane? Pilot/passenger incapacitation caused by carbon monoxide entering the cabin
How may reciprocating engine exhaust system leaks be detected? Signs of exhaust soot inside cowling and on adjacent components
Compared to normally aspirated engines, turbocharged engine exhaust systems operate at higher temperatures and higher pressures
Most exhaust system failures result from thermal fatigue cracking in the areas of stress concentration. This condition is usually caused by the high temperatures at which the exhaust system operates
On turbojet powered airplanes, thrust reversers are capable of producing between 35% and 50% of the rated thrust in the reverse direction
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
Engines using cold stream, or both cold and hot stream reversing include High bypass turbofans
The purpose of cascade vanes in a thrust reversing system is to turn to a forward direction the fan and/or hot exhaust gases that have been blocked from exiting through the exhaust nozzle
Turbojet and turbofan thrust reverser systems are generally powered by 2. electricity, 3. hydraulic pressure, 4. pneumatic pressure
The rearward thrust capability of an engine with the thrust reverser system developed is less than its forward capability.
Which statement is generally true regarding thrust reverser systems? It is possible to move some aircraft backward on the ground using reverse thrust
What is the proper operating sequence when using thrust reversers to slow an aircraft after landing? Retard thrust levers to ground idle, raise thrust reverser levers as required, and retard thrust levers to ground idle
The exhaust section of a turbine engine is designed to impart a high exit velocity to the exhaust gases
Thrust reversers utilizing a pneumatic actuating system usually receive operating pressure from the engine bleed air system
Created by: 501341413
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