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

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

Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.

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

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

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

If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.

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

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