MDE 6 Q1

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Question: Under what circumstances might relief valves in a diesel engine crankcase operate?

C) When the engine oil temperature is within the normal operating range

A) During normal engine startup and shutdown

D) During routine engine maintenance and servicing

B) When there is excessive blow-by gas pressure or high crankcase pressure

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Question: What is a common safety detection system that may be fitted to diesel engine crankcases?

B) Exhaust gas temperature gauge

A) Oil temperature sensor

C) Crankcase pressure sensor

D) Turbocharger speed monitor

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Question: Why are relief valves fitted to diesel engine crankcases?

A) To regulate the temperature of the engine oil

C) To prevent excessive pressure buildup and avoid crankcase damage

D) To filter out impurities from the engine air

B) To control the pressure of the engine coolant

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