The main purpose of port State control is not to（）

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

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

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

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

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

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

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

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

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