单项选择题
The general purpose of a heat exchanger is to （）.
A.eliminate hot air from the condenser
B.maintain steady pressure in a system
C.heat, or cool one fluid by means of another fluid
D.reduce the engine room temperature in tropical climates
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相关考题
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单项选择题
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）
A.Cross
B.Parallel
C.Counter
D.Circular -
单项选择题
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 length
B.be greatest in a single pass counter flow heat exchanger
C.remain constant throughout the heat exchanger
D.vary from section to section through out the heat exchanger -
单项选择题
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
A.a low load on the unit
B.a clogged pump suction strainer
C.a blockage in the line between the pump and hydraulic motor
D.the hydraulic motor turning too fast
