During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）

When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish

（） is not installed on the main switchboar.

The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）

Cold weather starting of a diesel engine may be made easier by（）

Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）

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?（）