“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）

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

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

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

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

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

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

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

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

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