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

试卷相关题目

• 1The 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

  开始考试点击查看答案
• 2Camshafts are usually driven by timing gears or  ______.

  A.push rods

  B.chain drives

  C.rocker arms

  D.flywheels

  开始考试点击查看答案
• 3Always 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

  开始考试点击查看答案
• 4The cetane number of a diesel fuel oil indicates its ______.

  A.viscosity

  B.acid content

  C.heating value

  D.ignition quality

  开始考试点击查看答案
• 5The discharge flow of a reciprocating pump is ______.

  A.steady

  B.in pulsation

  C.continuous

  D.large

  开始考试点击查看答案
• 6A 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

  开始考试点击查看答案
• 7Before a marine diesel engine is started the cylinders and pistons must be ______.

  A.cooled to appropriate temperature

  B.warmed up gradually to appropriate temperature

  C.opened up and renewed

  D.ground and polished

  开始考试点击查看答案
• 8A controllable pitch propeller on a diesel driven vessel eliminates the need for ______.

  A.friction clutches

  B.disconnect clutches

  C.reversing gears

  D.reduction gears

  开始考试点击查看答案
• 9The 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

  开始考试点击查看答案
• 10______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

  开始考试点击查看答案