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

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

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

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

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

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

The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）

Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.

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

On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.