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

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

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

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

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

A pressure drop through the refrigerant liquid line may 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 suction pressure at the refrigeration compressor is below normal, the cause can be（）.

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

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