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 （）.

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

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

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

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

Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）

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

If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.

The major source of chemical contaminants in hydraulic fluid is （）.

If the head pressure of a reciprocating refrigeration compressor is excessive, （）.