In diesel engineering practice,

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If the engine _____ for a long period, there will be a danger of frost.
- A.must to stand inoperative
- B.has to stand inoperative
- C.must be stood idle
- D.will stand idle
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If a line at right angles to the axis rotates about that axis and, at the same time, moves parallel to the axis, it will generate _____.
- A.a helix
- B.a helicoidal
- C.a curve
- D.a cone
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If the surveyors ______ yesterday, they would have finished the survey work.
- A.did not interrupt
- B.were not interrupted
- C.had not interrupted
- D.had not been interrupted
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In the _____ refrigeration compressor one end of the crank shaft extends through the crankcase house for connection, via a coupling or pulley, to an external drive motor.
- A.open-type
- B.hermetic
- C.semi-hermetic
- D.all the above
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All personnel should be familiar with the lifeboats _____.
- A.boarding and operating procedures
- B.maintenance schedule
- C.navigational systems
- D.fuel consumption rates
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The trim of a vessel is the _____.
- A.value of the mean draft
- B.degree of list
- C.amount of roll
- D.difference in fore and aft drafts
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When carrying out mooring trial, if the M.Ecan’t start normally, you should ____.
- A.take a further inspection in the voyage
- B.check and repair, then retrial
- C.do as the surveyor’s requirement
- D.retrial
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When the load is increased on a turbocharged diesel engine, the amount of increased air supplied by the turbocharger will___________.
- A.lag behind the increased fuel supplied to the engine
- B.enter the engine along with the increase in the fuel
- C.enter the engine before the increased fuel supply
- D.leave the turbocharger as a negative pulse
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Which of the following statements is correct concerning diesel engine cooling water systems?
- A.Each engine must have its own engine driven cooling water pump capable of providing cooling for all ranges of operation
- B.propulsion engines with bores exceeding 200 mm are to be fitted with a means to display the cooling water temperature of each cylinder
- C.At least two independent sea sucti8ons are to be provided for supplying water to the engine jackets or to the heat exchangers
- D.Suitable strain are to be fitted between the circulating pumps and heat exchangers when sea water is used for direct cooling
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In diesel engineering practice, the term used to express the ignition quality of a particular fuel is＿.
- A.cetane number
- B.octane number
- C.ignition index number
- D.volatility point
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In diesel engineering practice, the term used to express the ignition quality of a particular fuel is＿.