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

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 （）.

The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）

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

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

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

Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.

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

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

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