A.with both pumps on line at the same time
B.with one pump on standby
C.with the follow-up gear disconnected
D.only when the rudder is moved amidships
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A.high temperature distillate can be re- circulated to induce additional flashing
B.scale formation is not a severe problem
C.cold shocking is more effective in removing scale
D.water purity is greatly increased at high capacity
A.high pressure liquid line
B.low pressure liquid line
C.high pressure vapor line
D.low pressure vapor line
A.more efficiently uses available engine power
B.operates at a lower efficiency at a fixed speed
C.produces the same torque at lower engine power
D.develops its rated power at a lower speed
A.more efficiently uses available engine power
B.operates at a lower efficiency at a fixed speed
C.produces the same torque at lower engine power
D.develops its rated power at a lower speed
A.Dissipate heat
B.Trap foreign matter
C.Separate air from the oil
D.All of the above
A.Dissipate heat
B.Trap foreign matter
C.Separate air from the oil
D.All of the above
A.Proper refrigerant charge
B.Faulty expansion valve
C.Insufficient refrigerant
D.Solenoid valve stuck open
A.freezing the expansion valve closed
B.corrosion of system piping
C.improper temperature regulation
D.all of the above
A.built up propeller
B.solid propeller
C.controllable pitch propeller
D.suction back propeller
A.ignition temperature
B.flash point
C.flammable range
D.convection index
最新试题
When the steering gear is in operation, you should ().
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 ().
The output volume of a positive fixed displacement pump can be changed only by ().
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of ().
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?()
Which of the following statements is correct concerning heat transfer?()
If the suction pressure at the refrigeration compressor is below normal, the cause can be().
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by ().