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（）

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

Which of the following items don’t belong to dock repair works?（）

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

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

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

Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）

The main purpose of port State control is not to（）

（） is not installed on the main switchboar.