A.freeze on the expansion valve seat and reduce the flow of liquid refrigerant
B.emulsify the oil in the condenser
C.freeze in the king valve
D.clog the oil trap
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A.The colder seawater passing through the condenser tube bundles of the various stages increases evaporator vacuum
B.The amount of heated feed water discharged from the feed water heater after cndenser is increased
C.Fewer non-condensable gases are created by the flow of colder seawater
D.More seawater is allowed to pass through the flint stage overflow weir
A.bleeding refrigerant from the condenser
B.opening a drain petcock on the oil separator
C.condensing the water in the heat exchanger
D.using a dehydrator cartridge
A.drill holes through the heavy side of the impeller until it balances
B.weld counterweights to the light side of the impeller
C.remove metal from the heavy side by machining in a lathe
D.acid wash and serape the heavy side until it balances
A.cause loss of hydraulic oil from the system
B.result in extreme damage to the pump
C.cause damage to the pump ff not continually drained from the pump casing
D.result in the system high side pressure to substantially drop off
A.saltwater heater shell
B.second-stage condenser
C.atmosphere
D.second-stage flash chamber
最新試題
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by ().
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by ().
The usual symptoms of cavitation in a centrifugal pump is ().
If the suction pressure at the refrigeration compressor is below normal, the cause can be().
Thermostatic expansion valves can be adjusted for ().
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?()
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 general purpose of a heat exchanger is to ().