Thermostatic expansion valves can be adjusted for （）.

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

Which of the following statements is correct concerning heat transfer?（）

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

A salinity indicator is used to determine the （）.

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 （）.

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

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 （）.

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