Question 1 of 30
Function of crankcase relief door is to
A
release pressure from crankcase
B
stop the engine
C
reduce the speed of engine
D
detect the mist inside the crankcase
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Answer & Explanation
The correct answer is Option A: release pressure from crankcase.
Crankcase relief doors are designed as safety vents to rapidly release any abnormal pressure build-up within the crankcase, which can be caused by a crankcase explosion. This prevents damage to the engine casing and potential injury.