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

A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）

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

Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）

To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）

Flame failure in an automatically fired auxiliary boiler can from a/an （）

Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）

The cetane rating of diesel fuel is an indication of the （）

As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）

By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）