（） is not installed on the main switchboar.

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

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

To proceed to the assistance of a ship in distress is（）

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

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

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

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

The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

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