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

The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.

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

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

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

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 （）.

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

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

Thermostatic expansion valves can be adjusted for （）.

A grease gun is generally used to lubricate a （）.