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

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

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（）

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

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

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

Which of the following items don’t belong to dock repair works?（）

When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish

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