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

The rate of heat transfer from a hot region to a cold region is affected most by the （）.

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

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

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 （）.

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

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

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

The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.

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