A.Moisture separator
B.Vacuum breaker
C.Lubricator
D.Non-return valve
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A.rate of doing work
B.amount of force needed to overcome friction
C.amount of work accomplished
D.distance through which an object is moved
A.re-adjust the discharge pressure
B.clean the expansion valve screen
C.add refrigerant
D.adjust the expansion valve
A.splash method
B.mechanical force feed lubricators
C.detached sump method
D.internal cooling passages in the crankshafts and connecting rods
A.change the expansion valve adjustment
B.readjust the water regulating valve to increase the flow of water
C.purge air from the condenser
D.clean the waterside of the condenser
A.the pump over-speeding
B.an improper rudder response
C.bubbles in the sight glass
D.ram relief valves lifting
最新試題
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
Which of the listed pumps is NOT a positive displacement pump?（）
Low compressor head pressure in a refrigeration system can be caused by（）.
A salinity indicator is used to determine the （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）
A grease gun is generally used to lubricate a （）.
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.