A.more efficiently uses available engine power
B.operates at a lower efficiency at a fixed speed
C.produces the same torque at lower engine power
D.develops its rated power at a lower speed
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A.more efficiently uses available engine power
B.operates at a lower efficiency at a fixed speed
C.produces the same torque at lower engine power
D.develops its rated power at a lower speed
A.Dissipate heat
B.Trap foreign matter
C.Separate air from the oil
D.All of the above
A.Dissipate heat
B.Trap foreign matter
C.Separate air from the oil
D.All of the above
A.Proper refrigerant charge
B.Faulty expansion valve
C.Insufficient refrigerant
D.Solenoid valve stuck open
A.freezing the expansion valve closed
B.corrosion of system piping
C.improper temperature regulation
D.all of the above
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One cause of high head pressure occurring in a refrigeration system can be ().
The control mode in which the final control element is moved from one of two flexed positions to the other is known as ().
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is ().
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by ().
The usual symptoms of cavitation in a centrifugal pump is ().
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 ().
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by ().
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be ().
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by ().
The rate of heat transfer from a hot region to a cold region is affected most by the ().