A.Extensive centrifuging
B.Wax content
C.Water content
D.Acid content
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A.Viscosity will increase as temperature increases
B.Viscosity is a measure of a fluid s internal resistance to flow
C.Viscosity will decrease as temperature decreases
D.Viscosity is not dependent on temperature
A.the manual trick wheel is engaged for steering
B.the variable stroke pump is off stroke
C.a rudder order is given by the control system
D.an electric power system failure occurs at the steering gear
A.cool the expansion valve
B.prevent refrigerant superheating
C.condense the refrigerant gas
D.prevent motor overheating
A.Closing of the solenoid valve
B.Closing of the expansion valve
C.An increase in the suction pressure
D.Decreasing the suction pressure
A.When the helm is at any angle other than amidships
B.When the six-way valve is opened
C.When the ram relief valves lift
D.When the redder angle is different from the position of the helm
最新試題
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
Which of the following statements is correct concerning heat transfer?（）
One cause of high head pressure occurring in a refrigeration system can be （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
The general purpose of a heat exchanger is to （）.
Which of the listed pumps is NOT a positive displacement pump?（）
The output volume of a positive fixed displacement pump can be changed only by （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
A grease gun is generally used to lubricate a （）.