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

The general purpose of a heat exchanger is to （）.

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

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

When the steering gear is in operation, you should （）.

A pressure drop through the refrigerant liquid line may cause （）.

The output volume of a positive fixed displacement pump can be changed only by （）.

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

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

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