單項(xiàng)選擇題If a tow-stroke/diesel engine is over-speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?()

A.Move the fuel control mechanism to the no fuel position
B.Block the fuel supply by closing the master fuel valve
C.Shut off the fuel supply and block the flow of intake air
D.Relieve all pressure in the fuel system


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1.單項(xiàng)選擇題The breaking-up of fuel as it enters a diesel engine cylinder is known as()

A.airification
B.vaporization
C.atomization
D.gasification

2.單項(xiàng)選擇題The exhaust ports of a diesel engine using the cross-flow scavenging method are opened and closed by the ()

A.reciprocating motion of exhaust valves
B.rotary motion of the camshaft
C.reciprocating motion of the piston
D.developed differential

3.單項(xiàng)選擇題When fuel enters the crankcase of a diesel engine, it ()

A.dilutes the lube oil and reduces its viscosity
B.forms sulfuric acid in the lube oil
C.causes pitting and failure of the bearings
D.causes sludge deposits on valve stems

4.單項(xiàng)選擇題In the construction of a diesel engine, what is the purpose of end plates?()

A.To provide accessibility to the cylinder liners
B.To add stability to the engine block
C.To add rigidity to the block and a surface for attaching other parts
D.To make a surface for the base

5.單項(xiàng)選擇題A turbocharged, four-stroke/cycle diesel engine has a larger valve overlap than a naturally aspirated four-stroke/cycle diesel engine, in order to in crease the ().

A.temperature of the exhaust gases
B.energy supplied to the turbocharger
C.air pressure to the intake manifold
D.purge of exhausted gases from the cylinders