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

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

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

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

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

Low compressor head pressure in a refrigeration system can be caused by（）.

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（）.

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

A salinity indicator is used to determine the （）.