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【单项选择题】

The diesel engine is a type of （）.

A、A.turbine engine

B、B.gas turbine

C、C.steam engine

D、D.internal combustion engine

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更多“The diesel engine is a type of （）.”相关的问题

第1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2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3题

[单选题] White smoke issuing from the exhaust of an auxiliary diesel engine valve opening （）

A、the engine is overloaded B、the engine is cold C、there is too much lube oil in the cylinders D、the turbocharger is fouled

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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] （） allows the engine to be placed wherever is most suitable, as they no longer have to be aligned with reduction gearing and shafting as is the case with conventional installations.

A、Diesel engine propulsion B、Diesel electric propulsion C、Steam engine propulsion D、Gas turbine propulsion

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第6题

[单选题] （） the engines, the diesel engine is（） used engine on board.

A、Between；more commonly B、Among；the most commonly C、Between；not more commonly D、Among；not the most commonly

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第7题

[单选题] Which of the following precautions must be taken if an electric immersion heater is used to keep the coolant in a diesel engine warm during the time the engine is secured?（）

A、The coolant temperature must be maintained at 180℃ B、The thermostatic bypass valves must be manually opened before the engine is started C、The pressure cap must be removed while the engine is secured D、Electrical power to the heater must be secured before the cooling system is drained

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第8题

[单选题] Maximum horsepower of a diesel engine is attained （）.

A、when the engine RPM is pulled down by overload B、at rated engine RPM C、at 95 % of rated engine RPM D、at 95 % of a properly adjusted governor RPM with the engine under full load

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第9题

[单选题] A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （） (1) MEP is lower and the scavenging air is cooling the exhaust gases (2) valve overlap in a four-stroke

A、(1) only is correct B、(2) only is correct C、both (1) and (2) are correct D、Neither (1) or (2) are correct

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第10题

[单选题] Which of the following statements is true regarding the installation of piston rings on two-stroke/cycle, diesel engines as compared to four-stroke/cycle, diesel engines?（）

A、In a two-stroke/cycle engine, the rings run hotter, requiring the end gap to be greater B、Some provision must be made in a two-stroke/cycle engine to keep the rings from binding in the ports C、No gap is required to exist between the ends of the ring when cold in a two-stroke/cycle engine, but a small gap is required in a four-stoke/cycle engine D、The gaps should be staggered on either side of a piston in a two-stroke/cycle engine, while staggering is not necessary in a four-stroke/cycle engine

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