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

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

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

A grease gun is generally used to lubricate a （）.

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

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

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

The rate of heat transfer from a hot region to a cold region is affected most by the （）.

A salinity indicator is used to determine the （）.