A.refrigerant overcharge
B.overfeeding by the expansion valve
C.a restricted suction strainer
D.due to short cycling of the compressor
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A.capacity will increase
B.capacity will decrease
C.suction pressure will increase
D.suction pressure will decrease
A.hydraulic
B.electric
C.steam
D.diesel
A.increase the amount of cooling water to the condenser
B.decrease the amount of cooling water to the condenser
C.add more refrigerant to the system
D.remove some refrigerant from the system
A.Heat is given off from a high temperature region known as a heat sink
B.Heat transfer rate is affected most by the size of the heat sink involved
C.Heat transfer rate is affected most by the temperature difference between the heat source and the heat sink
D.Heat transfer by radiation will occur only by mass motion of a fluid substance
A.Maritime Safety Administration
B.Master of the vessel
C.Chief Engineer
D.Chief Mate
最新試題
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
A salinity indicator is used to determine the （）.
The major source of chemical contaminants in hydraulic fluid is （）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
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 （）.
A grease gun is generally used to lubricate a （）.
Thermostatic expansion valves can be adjusted for （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.