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

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?（）

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

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

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

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

For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）

Engine parameters shall be corresponded to NOx Technical Files. This is required by （）

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