How often should the lubricating oil of a diesel engine be changed?（）

A、After every trip

B、Every 4000 hours

C、According to manufacturer’s instructions

D、Every time they are shutdown

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更多“How often should the lubricating oil of a diesel engine be changed?（）”相关的问题

第1题

[单选题] When steering by autopilot,how often should the steering be checked?（）

A、12 times on each watch B、When time allows C、At least once a watch D、No checking is necessary

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第2题

[单选题] A:（）often do you go to the cinema? B: I go to the cinema once a week

A、What B、How C、Why

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第3题

[单选题] Many of the soundings shown on the chart are derived from （）.Undue reliance should not be placed upon them．

A、complete and often very poor surveys B、correct and often very good surveys C、inadequate and often very old surveys D、adequate and present surveys

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第4题

[单选题] Danage to ship’s fittings caused by stevedor’s negligence often happens. Therefore, the stevedores（）the cost of the damage repaired afterwards.

A、should hold responsible for B、should be hold responsible for C、should be free of D、should be brarable of

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第5题

[单选题] Hi, Celia!（）to the United States? It was wonderful. I really enjoyed it.

A、What was your idea B、How was your trip C、Who went D、How often did you travel

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第6题

[] 水手经常保养锚机。（）

A、A. Sailors often maintain the derrick. B、B. Sailors often maintain the winch. C、C. Sailors often maintain the windlass. D、D.Sailors often maintain the machine.

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第7题

[单选题] Damage to ship’s fittings caused by stevedore’s negligence often happens．Therefore，the stevedores（）the cost of repairs effected.

A、should hold responsible for B、should hear in mind C、should be held responsible for D、should bear no compensation for

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第8题

[单选题] The officer of the watch should（）comply with the collision rules.

A、some times B、often C、at all times D、seldom

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第9题

[简答题] How should language rules be learned according to the Direct Method?

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