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

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

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

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

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

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?（）

Engine parameters shall be corresponded to NOx Technical Files. This is required by （）

The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

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