ENGINE COOLING SYSTEMS WITH
QUESTIONS AND WELL VERIFIED
ANSWERS [ALREADY GRADED A+]
REAL EXAM!!! 2025
1. What is meant by pressure cooling of an aircraft engine? answer-- correct Air cooling in which air is
forced to flow through baffles and cylinder fins by a pressure differential across the engine.
2. What is the purpose of an augmentor tube in the cooling system of an aircraft reciprocating engine? --
-ANSWER----The augmentor tube uses the velocity of the exhaust gases to produce a low pressure on
one side of the engine that helps pull cooling air through it.
3. Where is the highest temperature located in a turbine engine? ---ANSWER----At the inlet to the high-
pressure turbine.
4. How are the turbine inlet guide vanes and the first-stage turbine blades in some turbine engines
cooled? ---ANSWER----High-pressure compressor bleed air flows through the hollow guide vanes and
hollow turbine blades.
5. Which side of an air-cooled engine cylinder has the greatest amount of cooling fins? ---ANSWER---The
side of the cylinder in which the exhaust valve is located.
6. What should be done to repair a bent cooling fin in a cast aluminum cylinder head? ---ANSWER----It is
normally best to leave a bent cast fin alone if it does not restrict the flow of air. Cast fins are brittle
and could break off.
7. What is used in a helicopter to increase the amount of cooling air that flows over the engine
cylinders? ---ANSWER----A belt-driven fan.
QUESTIONS AND WELL VERIFIED
ANSWERS [ALREADY GRADED A+]
REAL EXAM!!! 2025
1. What is meant by pressure cooling of an aircraft engine? answer-- correct Air cooling in which air is
forced to flow through baffles and cylinder fins by a pressure differential across the engine.
2. What is the purpose of an augmentor tube in the cooling system of an aircraft reciprocating engine? --
-ANSWER----The augmentor tube uses the velocity of the exhaust gases to produce a low pressure on
one side of the engine that helps pull cooling air through it.
3. Where is the highest temperature located in a turbine engine? ---ANSWER----At the inlet to the high-
pressure turbine.
4. How are the turbine inlet guide vanes and the first-stage turbine blades in some turbine engines
cooled? ---ANSWER----High-pressure compressor bleed air flows through the hollow guide vanes and
hollow turbine blades.
5. Which side of an air-cooled engine cylinder has the greatest amount of cooling fins? ---ANSWER---The
side of the cylinder in which the exhaust valve is located.
6. What should be done to repair a bent cooling fin in a cast aluminum cylinder head? ---ANSWER----It is
normally best to leave a bent cast fin alone if it does not restrict the flow of air. Cast fins are brittle
and could break off.
7. What is used in a helicopter to increase the amount of cooling air that flows over the engine
cylinders? ---ANSWER----A belt-driven fan.
