A.compression stroke
B.suction stroke
C.expansion stroke
D.exhaust stroke
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A.greater distillate purity through high temperature evaporation
B.cold shocking for scale removal is not required
C.less internal corrosion because of lower brine density
D.less feed-water is required for equal plant capacity
A.refrigerant bubbles in the lube oil
B.refrigerant reducing the lube oil viscosity
C.oxidation of the lube oil from overheating
D.reducing the floc or cloud point of the oil
A.Cooling the air to a temperature just above dew point
B.Heating the air to a point at which moisture will boil off ,then re-cooling it
C.Cooling the air to a point below dew point, then reheating it
D.Heating the air and then cooling it to a point below dew point
A.broken valve springs
B.tight drive belts
C.high line voltage
D.air in the system
In order to achieve greater dehumidification with an air conditioning system, you should （）
Ⅰ.reduce the cooling coil
Ⅱ.temperature increase the re-heater temperature
A.Ⅰonly
B.Ⅱ only
C.BothⅠandⅡ
D.NeitherⅠnorⅡ
最新試題
Which of the following items don’t belong to dock repair works?（）
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
Using a file without a handle may result in （）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
If separating effect is not good, which measure should be taken （）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
The main purpose of port State control is not to（）