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

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

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

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

Diesel engine air start system check valves are opened by （）

One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）

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

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

Using a file without a handle may result in （）

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