A.increase the amount of cooling water to the condenser
B.decrease the amount of cooling water to the condenser
C.add more refrigerant to the system
D.remove some refrigerant from the system
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A.Heat is given off from a high temperature region known as a heat sink
B.Heat transfer rate is affected most by the size of the heat sink involved
C.Heat transfer rate is affected most by the temperature difference between the heat source and the heat sink
D.Heat transfer by radiation will occur only by mass motion of a fluid substance
A.Maritime Safety Administration
B.Master of the vessel
C.Chief Engineer
D.Chief Mate
A.size of the heat sink
B.temperature difference between the regions
C.size of the heat source
D.total heat of the system
A.the four-way control valve failing to shift
B.the bleeder valve sticking in the open position
C.cold hydraulic fluid
D.a clogged air vent falter on the oil reservoir
A.add fluid that is the same color as the fluid in the reservoir
B.add turbine oil because it is always a good substitute
C.add any oil that has the same viscosity as the hydraulic fluid
D.check the winch manufacturers instruction book
最新試題
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 ().
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by ().
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by ().
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?()
If the head pressure of a reciprocating refrigeration compressor is excessive, ().
A grease gun is generally used to lubricate a ().
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by ().
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will ().
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be ().