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

Using a file without a handle may result in （）

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

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

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

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

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.

If separating effect is not good, which measure should be taken （）

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（）

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