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 （）.

If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.

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

Which of the listed pumps is NOT a positive displacement 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 （）.

A salinity indicator is used to determine the （）.

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

An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.

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