（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.

Under MARPOL Code the ship to which it applies has to carry （）

The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）

Diesel engine air start system check valves are opened by （）

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

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

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.

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（）

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

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