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

If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.

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

One cause of high head pressure occurring in a refrigeration system can be （）.

The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.

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

If the head pressure of a reciprocating refrigeration compressor is excessive, （）.

When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.

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

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 （）.