MDE 4 Q2

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Question: What is a likely consequence if an air cooler fails or becomes inefficient on a turbocharged diesel engine?

D) Improved fuel economy and lower engine emissions

C) Higher intake air temperature, leading to reduced engine efficiency and increased risk of knocking

A) Increased engine cooling efficiency

B) Lower exhaust gas temperature and reduced power output

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Question: What medium is commonly used to cool the air in an intercooler fitted after a turbocharger?

A) Exhaust gases

B) Engine coolant (water or antifreeze)

D) Fuel oil

C) Ambient air

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Question: How does an air cooler improve the performance of a diesel engine when fitted after a turbocharger?

A) By reducing fuel consumption and increasing power output

D) By preventing the turbocharger from overheating during operation

B) By slowing down the engine's RPM and reducing wear

C) By filtering out impurities from the intake air before it enters the engine

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Question: Why are air coolers (intercoolers) typically fitted after the main engine turbochargers?

D) To eliminate moisture from the intake air and prevent engine corrosion

C) To reduce the engine's overall weight and improve its fuel efficiency

B) To decrease the temperature of the intake air, increasing its density and improving engine efficiency

A) To increase the temperature of the intake air for better combustion

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Question: What is an important maintenance task for ensuring the efficient operation of air coolers in a turbocharged diesel engine?

B) Cleaning the air cooler to remove any buildup of dirt or oil

D) Adding fuel additives to the diesel fuel

C) Reducing the engine's operating temperature

A) Regularly replacing the turbocharger

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