搜题

【单项选择题】

Heat energy is a source of power, but （） will cause damage to the engine.

A、A.excessive heat

B、B.insufficient heat

C、C.effective cooling

D、D.high output

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更多“Heat energy is a source of power, but （） will cause damage to the engine.”相关的问题

第1题

[单选题] （） is a source of power by which the diesel engine may operate.

A、Water energy B、Electrical energy C、Chemical energy D、Heat energy

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第2题

[单选题] As a heat engine,（） energy is the source of power by which the diesel engine can be operated.

A、electric B、heat C、mechanical D、exhaust

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第3题

[单选题] Mechanical energy in transition is referred to as （）.

A、horsepower B、work C、heat D、velocity

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第4题

[单选题] The volute of centrifugal pump also acts as a diffuser converting （）into pressure head.

A、mechanical energy B、heat energy C、potential energy D、kinetic head

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第5题

[] In a diesel engine, offers the heat energy directly（）； works as working medium and changes the heat energy to mechanical energy（）

A、A.the burning of the fuel； medium shaft B、B.fuel spray； fresh air C、C.fuel； fuel spray D、D.the burning of the fuel； the burned gas mixture

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第6题

[] Thermal energy in transition is also referred to as （）.

A、A.heat B、B.power C、C.horsepower D、D.foot-pound

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第7题

[] The essential part of the diesel engine, whose function is to convert the heat energy into the mechanical power, is the （）.

A、A.crankshaft B、B.piston C、C.connecting rod D、D.bearing

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第8题

[单选题] The movement of heat within a fluid, caused by the application of thermal energy, is called （）.

A、radiation B、conduction C、convection D、condo-radiation

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第9题

[单选题] Since heat will not flow freely from a body at a （） temperature to another at a （） temperature, it is necessary to expend mechanical work, heat, or electrical energy from an external source to achieve refrigeration.

A、lower；higher B、shallower；deeper C、larger；smaller D、higher；lower

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