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

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

The treatment of the fuel oils involves storage, heating, filtering and（）

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

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

The shipboard oil pollution emergency plan will be invalid after （）

Using a file without a handle may result in （）

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

“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）

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