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 （）.

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

One cause of high head pressure occurring in a refrigeration system can be （）.

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

Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）

Thermostatic expansion valves can be adjusted for （）.

Which of the listed pumps is NOT a positive displacement pump?（）

If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.

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