The condensers located in various stages of a flash evaporator are cooled by（）

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

（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.

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

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

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

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

The ISPS Code consists of a mandatory section-Part A, which shows（）

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

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