A.fusion
B.vaporization
C.sublimation
D.condensation
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A.Overcoming sliding friction
B.Overcoming rolling friction
C.Overcoming fluid friction
D.Overcoming oil wedge friction
A.weight designation
B.viscosity index
C.pour point
D.thermal change value
A.fusion
B.vaporization
C.condensation
D.sublimation
A.capability of causing brittle fractures
B.highly corrosive action on mild steel
C.vapor cloud which reacts violently with saltwater
D.toxicity at atmospheric pressure
A.passing it through the expansion valve
B.condensing refrigerant in the system condenser
C.passing the gaseous refrigerant through the heat interchanger on the suction side of the compressor
D.maintaining a high pressure on the systems receiver
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If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
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 （）.
Which of the listed pumps is NOT a positive displacement pump?（）
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
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 （）.
When the steering gear is in operation, you should （）.
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?（）
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.