Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston...

第1题

[单选题] In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.

A、inefficiency B、oiliness C、detergency D、purity

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第2题

[单选题] Typical marine propulsion plants include（） directly coupled to the vessel’s single large-diameter, fixed-pitch propeller.

A、a single, long-stroke, slow-speed, turbocharged, two-stroke diesel engine B、a single, long-stroke, medium-speed, turbocharged, four-stroke diesel engine C、two medium-speed, turbocharged, four-stroke diesel engines D、a variable-speed AC generator

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第3题

[] One method of constructing large marine diesel engines and reducing the total engine frame weight is through （）.

A、A.casting interlocking components B、B.welding plates to form sections for assembly C、C.forging integral components D、D.case hardening integral components

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第4题

[单选题] The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.

A、principle B、principal C、cause D、case

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第5题

[单选题] Cylinders of marine diesel engines are normally cooled by （）.

A、sea water B、fine mineral oil C、sanitary water D、fresh water

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第6题

[单选题] Under manoeuvring condition the main engine may run on （）.

A、gas oil B、marine diesel oil C、residue oil D、crude oil