FREE AVIATION AND STUDY GAMES ABOUT ENGINE

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FREE AVIATION AND STUDY GAMES ABOUT ENGINE

COOLING EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -27 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: The greatest portion of heat generated by combustion in a typical aircraft reciprocating engine is

Answer:

carried out with the exhaust gases

Question 2: A bent cooling fin on an aluminum cylinder head

Answer:

should be left alone if no crack has formed Question 3: How do cowl flaps aid in cooling a horizontally opposed aircraft engine?

Answer:

controls the amount of air flowing around the cylinders

Question 4: Prolonged idling of an engine will usually result in

Answer:

foreign material buildup on spark plugs

Question 5: What is the purpose of an augmenter used in some reciprocating engine exhaust systems?

Answer:

to aid in cooling the engine Question 6: Cracks in cooling fins that do not extend into the cylinder head, may be repaired by

Answer:

removing the affected area and contour filing within limits

Question 7: How are combustion liner walls cooled in a gas turbine engine?

Answer:

by secondary air flowing through the combustion chamber Question 8: During ground operation of an engine, the cowl flaps should be in what position?

Answer:

fully open Question 9: Aircraft reciprocating engine cylinder baffles and deflectors should be repaired as required to prevent loss of

Answer:

cooling Question 10: Cylinder head temperatures are measured by means of an indicator and a

Answer:

thermocouple sensing drive Question 11: Which of the following should a mechanic consult to determine the maximum amount of cylinder cooling fin that could be removed when cracks are found?

Answer:

engine manufacturer's service or overhaul manual Question 12: Which statement is true regarding the air passing through the combustion section of a jet engine

Answer:

most is used for engine cooling

Question 13: Which of the following defects would likely cause a hot spot on a reciprocating engine cylinder?

Answer:

too much cooling fin broken off

Question 14: Reciprocating engines used in helicopters are cooled by

Answer:

a fan mounted on the engine Question 15: What is the position of the cowl flaps during engine starting and warm-up operations under normal conditions?

Answer:

full open at all times Question 16: The most common method and generally the best conduction of heat from the inside of a cylinder barrel to the cooling air is accomplished by

Answer:

machining fins directly on the outside of the barrel Question 17: The position of cowl flaps during normal cruise flight conditions is

Answer:

closed

Question 18: What is the function of a blast tube as found on aircraft engines?

Answer:

a device to cool an engine accessory Question 19: The primary purpose of baffles and deflectors installed around cylinders of air-cooled aircraft engines is to

Answer:

force cooling air into close contact with all parts of the cylinders Question 20: (1) Some aircraft exhaust systems include an augmenter system to draw additional air over the engine for cooling. (2) Augmenter systems are used to create a low pressure area at the lower rear of the aircraft engine cowling.

Answer:

both No.1 and No.2 are true.

Question 21: Which of he following assists in removing heat from the metal walls and fins of an air-cooled cylinder assembly?

Answer:

a baffle and cowl arrangement Question 22: During an operational check of an electrically powered radial engine cowl flap system, the motor fails to operate. Which of the following is the first to be checked?

Answer:

Flap actuator motor circuit breaker

Question 23: Where are cooling fins usually located on air-cooled engines?

Answer:

cylinder head, cylinder barrel, and inside the piston head Question 24: The active clearance control (ACC) portion of the EEC system aids turbine engine efficiency by

Answer:

ensuring turbine blade to engine case clearances are kept to a minimum by controlling case temperatures Question 25: What part of an air-cooled cylinder assembly has the greatest fin area per square inch?

Answer:

Exhaust valve port

Question 26: A broken cooling fin on a cylinder head

Answer:

may be filed to smooth contours if damage and/or repair limits are not exceeded

Question 27: Generally, a small crack just started in a cylinder baffle

Answer:

may be stop drilled