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

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

Flame failure in an automatically fired auxiliary boiler can from a/an （）

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

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

The treatment of the fuel oils involves storage, heating, filtering and（）

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

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

（） is not installed on the main switchboar.

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