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

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

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

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

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

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（）.

The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.

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

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