單項(xiàng)選擇題A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a ().

A.slow-speed diesel
B.medium-speed diesel
C.high-speed diesel
D.constant-speed diesel


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1.單項(xiàng)選擇題The three basic parts of any eductor are the nozzle, the suction chamber, and the ().

A.injector
B.compressor
C.diffuser
D.siphon

2.單項(xiàng)選擇題(), the engine must be stopped immediately.

A.Should knocking occur
B.If knocking occur
C.Should if knocking occurs
D.If occur knocking

3.單項(xiàng)選擇題Grind the ().

A.keyway
B.shaft
C.packing
D.valve

4.單項(xiàng)選擇題Which of the following can be obtained by means of an indicator card?()

A.the peak pressure in a cylinder
B.the temperature of the cooling water
C.the fuel consumption
D.none of the above

5.單項(xiàng)選擇題The lower section of a piston is called the ().

A.land
B.skirt
C.crown
D.plate

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