A.An expansion valve
B.An evaporator
C.A thermostat
D.A condenser
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A.servo-motor
B.swash plate
C.plunger
D.cylinder
A.a change-over chest
B.a head tank
C.a emergency bilge pump
D.an air cooler
A.the hunting gear
B.the rudder stock
C.the rudder controller
D.the feedback unit
A.the control rod
B.the hunting gear
C.the floating ring
D.the tiller arm
A.air cooler
B.economizer
C.injector
D.air blower
最新試題
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 gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
The major source of chemical contaminants in hydraulic fluid is （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
Which of the listed pumps is NOT a positive displacement pump?（）
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
Low compressor head pressure in a refrigeration system can be caused by（）.
One cause of high head pressure occurring in a refrigeration system can be （）.