Before a marine diesel engine is started the cylinders and pistons must be ______.

试卷相关题目

• 1A dirty diesel engine oil filter element can best be detected by ______.

  A.visual inspection of the elements

  B.the pressure drop across the filter

  C.high lube oil sump temperature

  D.decrease in oil viscosity from the filter

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• 2The total starting air capacity required for reversible main engines is to be sufficient for a least ______.

  A.six consecutive(连续的) starts

  B.eight consecutive starts

  C.ten consecutive starts

  D.twelve consecutive starts

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• 3The cylinder oil is pumped into the cylinder (via non-return valves) when the piston rings pass the lubricating orifices, during______.

  A.the upward stroke

  B.the downward stroke

  C.the power stroke

  D.the suction stroke

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• 4Camshafts are usually driven by timing gears or  ______.

  A.push rods

  B.chain drives

  C.rocker arms

  D.flywheels

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• 5Always ensure that the turning gear is______, even at the quay, the wave from other ships may turn the propeller and thus the engine.

  A.disengaged

  B.engaged

  C.assembled

  D.disassembled

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• 6A controllable pitch propeller on a diesel driven vessel eliminates the need for ______.

  A.friction clutches

  B.disconnect clutches

  C.reversing gears

  D.reduction gears

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• 7The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust ______.

  A.gas composition

  B.gas temperature

  C.pressure

  D.timing

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• 8______continuously extract the crankcase atmosphere, via a pipe system, and move it past a sensitive and accurate opacity (不透明)measuring track.

  A.The oil mist detectors

  B.The smoke detectors

  C.An oily water monitor

  D.Oil discharge monitoring and controlling system

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• 9The water in a steaming auxiliary boiler should be tested daily for ______.

  A.dissolved oxygen

  B.chlorides

  C.sludge

  D.dissolved nitrogen

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• 10A firebox explosion in an automatically fired auxiliary boiler may be the result of ______.

  A.excessive purging before lighting off

  B.insufficient trail for ignition period

  C.a faulty transformer in the ignition circuit

  D.insufficient purging after lighting off

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