Using a file without a handle may result in （）

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

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

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.

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

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

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

Flame failure in an automatically fired auxiliary boiler can from a/an （）

The condensers located in various stages of a flash evaporator are cooled by（）