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

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

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

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

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 （）.

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

The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.

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

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

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