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

Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）

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

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.

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 （）

Cold weather starting of a diesel engine may be made easier by（）

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（）

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

The condensers located in various stages of a flash evaporator are cooled by（）