The diesel engine valve subjected to most severe conditions of service is the （）.

A、cylinder exhaust valve

B、air starting valve

C、air inlet valve

D、cylinder relief valve

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更多“The diesel engine valve subjected to most severe conditions of service is the （）.”相关的问题

第1题

[单选题] The size of the exhaust valve opening is （）

A、most critical in a four-stroke cycle diesel engine B、most critical in a two-stroke/cycle diesel engine C、most critical in a four-stroke/cycle diesel engine if it is turbocharged D、of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine

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第2题

[单选题] Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because （）

A、bearing pressure in a four-stroke\cycle acting single diesel engine is continually reversed B、bearing pressure in a two-stroke\cycle single acting diesel engine is continually reversed C、the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine D、two-stoke/cycle diesel engines require more complicated lubrication piping

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第3题

[单选题] According to the relevant regulation, lifeboat should be powered by（）.

A、inboard diesel engine B、outboard diesel engine C、outboard gasoline engine D、inboard gasoline engine

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第4题

[单选题] Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）

A、increasing the quantity of starting air B、increasing the lube oil pressure C、heating the engine fuel supply D、heating the engine jacket water

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第5题

[单选题] The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speedIn maintaining this relationship, the camshaft drive causes the camshaft to rotate at（）

A、one half crankshaft speed in a two-stroke cycle diesel engine B、crankshaft speed in a two-stroke cycle diesel engine C、two times crankshaft speed in a two-stroke cycle diesel engine D、one-fourth times crankshaft speed in a four-stroke cycle diesel engine

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第6题

[单选题] Which of the following is false?（）

A、preparation for stand-by should be organized by engine room B、engine trails should be agreed with bridge, and then do it C、As to engine trials of the twin diesels and two propellers, the two diesels should use “slow ahead” at the same time D、After engine trials, the handle of the engine telegraph should be put in the “stop” position

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第7题

[] Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by （）

A、A.increasing the quantity of starting air B、B.increasing the lube oil pressure C、C.heating the engine fuel supply D、D.heating the engine coolant

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第8题

[单选题] The booster pump, which supplies diesel oil to（） , should have a possibility of being powered by compressed air or by emergency power.

A、the main engines B、the auxiliary engines C、the emergency generator engine D、the auxiliary engines and the main engine(s)