Thermostatic expansion valves can be adjusted for （）.

A salinity indicator is used to determine the （）.

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

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

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

If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.

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

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

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 （）.

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