If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should （）.

Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）

On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.

An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.

The usual symptoms of cavitation in a centrifugal pump is （）.

An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.

Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）

An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.

Which of the following statements is correct concerning heat transfer?（）

The major source of chemical contaminants in hydraulic fluid is （）.