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热耗率（heat rate）
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更多 “热耗率（heat rate）” 相关考题
考题
单选题However fast or slow the combustion rate, it is still a （） between carbon, hydrogen, sulphur and oxygen that releases heat.A
physical deformationB
state exchangeC
chemical reactionD
coalescence
考题
单选题Which of the statements listed concerning heat transfer is correct?（）A
Heat is always transferred at a constant rateB
Heat transfer rate increases as temperature difference increasesC
The rate of heat transfer is not affected by temperature differenceD
The high temperature region is known as a heat sink
考题
单选题The rate of heat transfer from a hot region to a cold region is affected most by the （）.A
size of the heat sinkB
temperature difference between the regionsC
size of the heat sourceD
total heat of the system
考题
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
考题
单选题The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.A
remain constant along the tubes lengthB
be greatest in a single pass counter flow heat exchangerC
remain constant throughout the heat exchangerD
vary from section to section through out the heat exchanger
考题
单选题The purpose of designing some waste heat boilers with sinuous fire tubes, is to（）A
increase exhaust gas velocity through the boilerB
reduce accumulations of carbon deposits on the heat transfer surfacesC
eliminate exhaust gas pulsations and noiseD
increase the rate of heat transfer to the waterside
考题
单选题Generating tubes in waste heat boilers are finned to （）.A
reduce gas flow turbulenceB
prevent exhaust gas corrosionC
increase the rate of combustionD
increase the rate of heat transfer
考题
单选题Fins are installed on the generating tube surfaces in waste heat boilers to （）.A
prevent soot fires in the exhaust systemB
prevent exhaust gas erosion of the tubesC
increase the velocity of exhaust gas flowD
increase the rate of heat transfer
考题
单选题Physical exertion on the part of a person who has fallen into cold water would（）.A
be the best thing to try if there was no rescue in sightB
increase survival time in the waterC
increase the rate of heat loss from the bodyD
not affect the heat loss from the body
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