Exam (elaborations)

POWERPLANT - ENGINE COOLING SYSTEMS

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POWERPLANT - ENGINE COOLING SYSTEMS What is meant by pressure cooling of an aircraft engine? - CORRECT ANSWER -Air cooling in which air is forced to flow through baffles and cylinder fins by a pressure differential across the engine. What is the purpose of an augmentor tube in the cooling system of an aircraft reciprocating engine? - CORRECT ANSWER -The augmentor tube uses the velocity of the exhaust gasses to produce a low pressure on one side of the engine that helps pull cooling air through it. Where is the highest temperature located in a turbine engine? - CORRECT ANSWER -At the inlet to the high-pressure turbine How are the turbine inlet guide vanes and the first stage turbine blades in some turbine engines cooled? - CORRECT ANSWER -High pressure compressor bleed air flows through the hollow guide vanes and hollow turbine blades. Which side of an air-cooled engine cylinder has the greatest amount of cooling fins? - CORRECT ANSWER -The side of the cylinder in which the exhaust valve is located.

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POWERPLANT - ENGINE COOLING SYSTEMS

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