Cooling Systems Flashcards

1
Q

Where can you find the maximum amount of cylinder fin area that can be removed in order to clean out a damaged area

A

Engine overhaul manual

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What must be inspected on the cooling system of an air cooled engine

A

All of the baffles and air seals must be in place and in good condition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Why should an air cooled engine not run up to high power without the cowling installed

A

Engine depends on the cowling to force air through the cylinder fins to remove the excess heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the purpose of cooling fins

A

To increase the surface area of the cylinder for cooling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the purpose of cowl flaps and how are they operated

A

Used to control the amount of airflow through the cowling. They are usually mechanically, electrically, or hydraulically operated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How does an augmenter cooling system work

A

An outer tube placed over the exiting exhaust gas creates a Venturi affect that draws more airflow over the engine, this provides additional cooling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Where should cowl flaps be positioned for ground operations

A

Fully open

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What type of power is used to operate cowl flaps

A

Manual, hydraulic, or electrical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Why is cowl flaps adjustment important

A

To keep cylinder head temperatures within allowable limits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How are turbine engines cooled

A

Cooled by air passing through the engine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

In a turbine engine where does bleed air come from that is used to cool bearings and other parts

A

Bleed air from the Engine compressor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the approximate percentage of air passing through a turbine engine that is used for cooling rather than combustion

A

Approximately 75%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What document describes the proper use of cowl flaps on an air cooled engine

A

Pilot operating handbook

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the most common means of regulating the cooling air flow through a reciprocating engine

A

Use of cowl flaps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

When should cowl flaps be kept in the fully open position

A

Normally during all ground run operations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What publication should be referred to before re-profiling cylinder cooling fins

A

Manufactures service manual or overhaul manual

17
Q

What are the main reasons that excessive heat in a reciprocating engine is undesirable

A

It shortens the life of the engine parts, impairs lubrication and affects combustion

18
Q

What is the source of air directed to engine bearings for cooling

A

Bleed air from compressor section of the engine

19
Q

What type of materials are used to make insulation blankets for turbine engines

A

Made of stainless steel, layers of aluminum foil, fiber glass and silver foil

20
Q

What areas of a turbine engine are cooled by the secondary air passing through the engine

A

Combustion chamber and the turbines

21
Q

What is the purpose of an engine cowling, baffles and cowl air seals

A

Streamlines the engine to reduce drag, which forces the airflow over the cylinders for cooling

22
Q

What is the purpose of an oil cooler bypass valve

A

It allows the thick oil to bypass the cooler when oil is cold

23
Q

What is the purpose of an augmenter used in some reciprocating engine exhaust systems

A

To aid in cooling the engine

24
Q

Cracks in cooling fins that do not extend into the cylinder head may be repaired by

A

Removing affected area and contour filing within limits

25
Q

A bent cooling fin on an aluminum cylinder

A

Should be left alone if not cracked

26
Q

Position of the cowl flaps during normal cruise flight is

A

Closed

27
Q

Closed during operational check of an electrically powered radial engine cowl flaps system the motor fails to operate. What is the first to be checked

A

Flap actuator motor circuit breaker

28
Q

What part of an air cooled cylinder assembly has the greatest fin area per square inch

A

Exhaust port valve