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

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

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

The cetane rating of diesel fuel is an indication of the （）

A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）

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

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

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

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（）

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