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 （）.

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

Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）

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

Thermostatic expansion valves can be adjusted for （）.

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

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

When the steering gear is in operation, you should （）.

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