Cracking of a diesel piston crown can result from（）

A、Excessive piston to liner clearance

B、The underside of the piston crown being excessively dirty lowering the rate of heat transfer

C、Faulty nozzle spray

D、All of the above

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更多“Cracking of a diesel piston crown can result from（）”相关的问题

第1题

[单选题] Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?（）

A、Leaking seal ring B、Insufficient heat transfer from the exhaust valves C、Block cooling water passages to the head D、Excessive scavenging air provided to the engine

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第2题

[单选题] “The use of a poor quality oil can lead to rapid deterioration of its properties with the resultant formation of deposits in the piston crown which in turn results in a considerable reduction in heat transfer with subsequent overheating and thermal cracking” According to this sentence, we can know that the principle reason of the overheating and thermal cracking is（）

A、the use of a poor quality oil B、the deterioration of its properties C、the formation of deposits D、the reduction in heat transfer ability

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第3题

[单选题] After the ship is out of the harbour and in “Full Speed”, well change （）.

A、to fuel oil instead of diesel oil B、for fuel oil instead of diesel oil C、to diesel oil into fuel oil D、for diesel oil into fuel oil

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第4题

[] Duty officer informs us that the vessel is out of harbor and in “Full Ahead”We are going to run （）.

A、A.diesel oil instead of fuel oil B、B.fuel oil instead of diesel oil C、C.diesel oil instead fuel oil D、D.fuel oil instead diesel oil

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第5题

[单选题] Dirt in the fuel oil system of a diesel engine can cause （）.

A、clogged filters B、poor combustion C、overloading of the diesel D、shock of fuel lines

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第6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