Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
|
Of what material are most reciprocating engine exhaust components made? |
Corrosion-resistant Steel |
|
|
How is the speed of a turbocharger controlled? |
By controlling the flow of exhaust gases through the waste gate |
|
|
What type of actuator is used to control the position of the turbocharger waste gate? |
Hydraulic actuator |
|
|
How does a power recovery turbine increase the power of a reciprocating engine? |
Through exhaust-driven velocity turbines coupled through a hydraulic drive to the engine crankshaft which assist in rotation of crankshaft |
|
|
How tight should the clamps be tightened that hold sections of a reciprocating engine exhaust system together? |
Not too tight to allow for expansion and contraction of components from the heat |
|
|
What would be the effect on an engine performance of an internal failure of a muffler? |
Loss of engine power as it will cause an increase in exhaust back pressure |
|
|
What effect on turbine engine operation is caused by a change in the area of the exhaust nozzle? |
It affects the compression ratio, the RPM, mass airflow through the engine and EGT |
|
|
What are two types of thrust reversers that are used with turbojet engines? |
Mechanical blockage or clamshell, aerodynamic blockage or cascade |
|
|
How does the noise suppressor reduce the amount of noise produced by a turbojet engine? |
By breaking up the low frequencies in the exhaust stream and converting them into higher frequencies which are dissipated into the air more easily |
|
|
What is the purpose of the ball joints and bellows in the exhaust system of a reciprocating engine? |
To allow for expansion and contraction of exhaust system components without causing a leak |
|
|
Why do some supersonic aircraft use a convergent-divergent exhaust duct? |
To control exhaust gases as they leave the engine to produce thrust at supersonic velocities |
|
|
Why is it important that lead pencils never be used to mark an aircraft exhaust system? |
Because the graphite in the pencil will infuse into metal when it's heated making the metal brittle and easy to crack |
|
|
What type of damage is normally found in the hot section of a turbine engine? |
Cracks due to overheat conditions |
