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单选题
Which of the following statements is correct concerning heat transfer?（）
A
Heat is given off from a high temperature region known as a heat sink
B
Heat transfer rate is affected most by the size of the heat sink involved
C
Heat transfer rate is affected most by the temperature difference between the heat source and the heat sink
D
Heat transfer by radiation will occur only by mass motion of a fluid substance
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更多 “单选题Which of the following statements is correct concerning heat transfer?（）A Heat is given off from a high temperature region known as a heat sinkB Heat transfer rate is affected most by the size of the heat sink involvedC Heat transfer rate is affected most by the temperature difference between the heat source and the heat sinkD Heat transfer by radiation will occur only by mass motion of a fluid substance” 相关考题
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Energy may not be transformedC
The total quantity of energy in the universe is always the sameD
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Cargoes are any type of goods transported by any type of shipsB
Cargoes are goods transported in bulkC
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the turbocharger may surgeC
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It is impossible to throttle flow with a butterfly valveC
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单选题Which of the statements listed concerning heat transfer is correct?（）A
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Heat transfer rate increases as temperature difference increasesC
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They are started with the discharge valve openedC
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单选题Which of the following statements is correct concerning diesel engine cooling water systems?（）A
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A priming pump is always required to flood the impeller suctionD
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单选题Which of the following statements is correct concerning the “flash point ” of a liquid?（）A
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单选题Which of the following statements concerning fuel atomization in a diesel engine cylinder is correct?（）A
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Viscosity will increase as temperature increasesB
Viscosity is a measure of a fluid s internal resistance to flowC
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The voltage drop across each resistor is the sameB
The total current flow equals the reciprocal of the sum of the individual currentsC
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The total voltage equals the sum of the individual voltages across each resistance
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