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

Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）

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

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（）

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

The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）

（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

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

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