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

Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）

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.

（） is not installed on the main switchboar.

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

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

The main purpose of port State control is not to（）

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

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

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（）