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

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, （）.

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

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

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 （）.

An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.

An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.

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

A pressure drop through the refrigerant liquid line may cause （）.