A.the distillate produced has greater purity
B.no boiling occurs on heat transfer surfaces
C.evaporation occurs at a higher rate
D.the incoming feed is at a higher temperature
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A.the system is fully charged
B.there is air leaking in from the condenser
C.ice crystals are forming in the refrigerant
D.the system contains less than a full charge of refrigerant
A.Simplex
B.Duplex
C.Canister
D.Bypass
A.condition of the expansion valve
B.moisture in the system
C.condition of the compressor suction valves
D.condenser temperature
A.trick wheel
B.accumulator
C.standby pump
D.telemotor
A.Open the bilge pump for inspection
B.Remove each of the manifold valves
C.Remove only the manifold valve to the affected bilge-well
D.Attempt to pump out another bilge well to determine if the entire system is affected
最新試題
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
Which of the listed pumps is NOT a positive displacement pump?（）
Low compressor head pressure in a refrigeration system can be caused by（）.
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
Thermostatic expansion valves can be adjusted for （）.
When the steering gear is in operation, you should （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）