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（）

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

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

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

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

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

（） is not installed on the main switchboar.

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

Using a file without a handle may result in （）

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