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

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

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

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

The shipboard oil pollution emergency plan will be invalid after （）

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

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

As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）

For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）

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