A.in series
B.in parallel
C.assembled
D.together
您可能感興趣的試卷
你可能感興趣的試題
A.gasket
B.packing
C.washer
D.spring
A.Wear
B.Contaminating
C.Coalescence
D.Coarse separating
A.non-pulsating
B.pulsating
C.positive
D.non-positive
A.injection valve
B.relief valve
C.discharge valve
D.inlet filter
A.gear
B.vane
C.screw
D.centrifugal
最新試題
One cause of high head pressure occurring in a refrigeration system can be （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
The major source of chemical contaminants in hydraulic fluid is （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.