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
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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
A.suppressant additive
B.dispersant additive
C.extreme pressure additive
D.viscosity improver additive
A.centrifugal pumps
B.jet pumps
C.propeller pumps
D.reciprocating pumps
A.a compressed packing gland
B.lantern tings between the packing rings
C.a liquid seal
D.the stuffing box gland
A.loss of second stage vacuum
B.contamination of the distillate
C.lower feed inlet temperature
D.contamination of the second stage condenser
A.total head
B.discharge head
C.net positive suction head
D.suction head
A.slide block
B.tilting box
C.pintle
D.reaction ring
最新试题
A grease gun is generally used to lubricate a ().
The output volume of a positive fixed displacement pump can be changed only by ().
If the suction pressure at the refrigeration compressor is below normal, the cause can be().
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be ().
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?()
Which of the listed pumps is NOT a positive displacement pump?()
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?()
Which of the following statements is correct concerning heat transfer?()
A gradual decrease in the discharge pressure of an operating hydraulic pump can 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 ().