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（）

During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.

To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）

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

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

If separating effect is not good, which measure should be taken （）

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

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

“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）

Using a file without a handle may result in （）