A.Differential
B.Trunk
C.Barrel
D.Valve-in-head
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A.return to a neutral position
B.flood the evaporator
C.open
D.close
A.control air system
B.forced draft air system
C.supply air system
D.ships service air system
A.dehydrated
B.purged
C.plugged
D.evacuated
A.combustion control air system
B.supply air system
C.ships service air system
D.low pressure deck air system
A.dry bulb temperature
B.wet bulb temperature
C.saturation temperature
D.water vapor superheat
最新試題
One cause of high head pressure occurring in a refrigeration system can be （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
When the steering gear is in operation, you should （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
Which of the listed pumps is NOT a positive displacement pump?（）
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.