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

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

To proceed to the assistance of a ship in distress is（）

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

（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）

Cold weather starting of a diesel engine may be made easier by（）

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

Using a file without a handle may result in （）

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