A.condensate pump ball bearing
B.main shaft bearing
C.main turbine bearing
D.diesel engine wrist pin bearing
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A.suction pressure only
B.head pressure only
C.superheat only
D.suction pressure and box temperature
A.specific gravity
B.viscosity
C.S E number
D.hydrolytic stability
A.microscopic steel shavings
B.abrasive waste
C.anti-oxidant compounds
D.oxidation by-products
A.increase the capacity of the coil
B.increase the superheat at the bulb
C.deliver more refrigerant to the coil
D.decrease the capacity of the coil
A.Centrifugal
B.Reciprocating
C.Gear
D.Rotary
最新試題
The major source of chemical contaminants in hydraulic fluid is ().
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be ().
The output volume of a positive fixed displacement pump can be changed only by ().
Thermostatic expansion valves can be adjusted for ().
If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should ().
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is ().
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump ().
A salinity indicator is used to determine the ().
Which of the following statements is correct concerning heat transfer?()
The usual symptoms of cavitation in a centrifugal pump is ().