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

Using a file without a handle may result in （）

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

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

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.

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（）

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

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

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

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