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

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

Diesel engine air start system check valves are opened by （）

The ISPS Code consists of a mandatory section-Part A, which shows（）

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

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

（） is not installed on the main switchboar.

If separating effect is not good, which measure should be taken （）

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

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