insufficient refrigeration
leaky suction valves
expansion valve stuck open
suction valve not adjusted properly
第1题：
The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by which of the following conditions?______.
A.Rain and poor visibility
B.Dropping barometric pressure and backing wind in the Northern Hemisphere
C.High winds and rising sea
D.Severe thunderstorms
第2题：
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?
A.A shortage of liquid refrigerant.
B.Excessive frost on the evaporator.
C.Excessive condenser cooling water.
D.Insufficient condenser cooling water flow.
第3题：
Which of the following terms is used to identify the pressure of the liquid entering a pump?
A.Suction head
B.Pump head
C.Discharge head
D.Total head
第4题：
Which of the following failed components would be responsible for the fuser unit not heating properly？（）
第5题：
Which of the problems listed could cause erosion of the expansion valve disks and seats?
A.Overcharging the system with refrigerant
B.Faulty compressor suction valve
C.Failure of the high pressure cutout
D.Flash gas formed in the liquid line
第6题：
If the suction pressure at the refrigeration compressor is below normal, the cause can be
A.refrigerant overcharge
B.overfeeding by the expansion valve
C.a restricted suction strainer
D.due to short cycling of the compress
第7题：
If the suction pressure for an operating refrigeration compressor is below normal, the cause may be ______.
A.an excess of liquid refrigerant
B.the expansion valve overfeeding
C.a fouled compressor suction strainer
D.the compressor short cycling
第8题：
Of the following, which one is not a term of Marine Weather Bulletin?______.
A.Complex low
B.Depression
C.High pressure
D.Ambient pressure
第9题：
Which statement about inert gas pressures in a cargo tank is TRUE ________．
A.The pressures of the inert gas in the tank may create excessive pressure at the pump while discharging
B.Gas pressures should be maintained at the highest permissible level throughout the discharging process
C.High gas pressures may cause pyrophoric oxidation in the tank
D.High gas pressures may cause loss of suction when stripping
第10题：
Which of the following is MOST likely the reason a technician would implement software RAID for a SOHO environment？（）