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?（）

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

A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.

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

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

The general purpose of a heat exchanger is to （）.

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

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

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

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