單項(xiàng)選擇題

As engine RPM is increased from idle speed to full load speed, which of the conditions listed will decrease?（）

A.Compression ratio
B.Fuel/Air ratio
C.Compression pressure
D.Lube oil pressure

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單項(xiàng)選擇題

Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to （）

A.test the starting system
B.remove condensation from the cylinders
C.check the compression
D.check for proper lube oil pressure

單項(xiàng)選擇題

In the starting process of a diesel engine, the main object is to attain the compression conditions sufficient to （）

A.turn the flywheel
B.reduce friction
C.overcome inertia
D.ignite the fuel

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