题目内容

In the most up-to-date common rail diesel engine, the fuel is first stored in the fuel line andthen, when a signal is given by the engine control to( ) injected into the cylinders.

A. the pilot air valve
B. the magnetic valves
C. the safety valve
D. the cylinder valve

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Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to( )

A. decrease the time required between cleanings
B. remove all large and small foreign objects
C. ensure a positive flow of oil at all times
D. ensure that all lube oil has been treated twice

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The four-stroke cycle is so called because it takes to complete the processes needed to( )convert the energy in the fuel into work.

A. two strokes of the piston
B. four strokes of the piston
C. one revolution of the crankshaft
D. four revolutions of the crankshafts

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In the suction stroke, the crankshaft is rotating clockwise and the piston is moving the( )cylinder.The inlet valve is( )and a fresh charge of air is being drawn or pushed into the cylinder by the turbocharger.

A. up; opened
B. down;opened
C. up;closed
D. down; closed

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In a four- stoke/cycle diesel engine, after the completion of the power stroke, the piston will move( )

A. up and draw in a fresh air charge
B. down to burn off fuel
C. down to compress the fuel air charge
D. up and force out the exhaust gases

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In the most up-to-date common rail diesel engine, the fuel is first stored in the fuel line andthen, when a signal is given by the engine control to( ) injected into the cylinders.

A. the pilot air valve B. the magnetic valves C. the safety valve D. the cylinder valve

Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to( )

The four-stroke cycle is so called because it takes to complete the processes needed to( )convert the energy in the fuel into work.

In the suction stroke, the crankshaft is rotating clockwise and the piston is moving the( )cylinder.The inlet valve is( )and a fresh charge of air is being drawn or pushed into the cylinder by the turbocharger.

In a four- stoke/cycle diesel engine, after the completion of the power stroke, the piston will move( )

A. the pilot air valve
B. the magnetic valves
C. the safety valve
D. the cylinder valve