A pump is said to have "negative suction head" when the pump is located ().
时间:2022-10-28
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by ().
Which of the following chemicals will be used where protection against caustic cracking is required in boiler treatment?()
时间:2022-10-27
In the design of hydraulic piping and equipment consideration is given to minimize turbulence in the hydraulic fluid, as this will cause ().
Why will a two stage flash type distilling plant tend to operate more efficiently when operating in cold seawater?()
In a compression refrigeration cycle, the temperature of the liquid refrigerant experiences its greatest decrease in the().
The boiler is fired () the demand for steam exceeds that available from exhaust gas heating.
时间:2022-10-26
Which of the problems listed could be indicated if a sight glass in the refrigerant liquid line is full of bubbles?()
When making entries in the Oil Record Book, the date, operational code and item number shall be inserted in the appropriate columns and the required particulars shall be recorded () in the blank spaces.
In (), hot diesel engine jacket water passes over the stack and heats the sea water passing through the tubes.
The rotor of the hydraulic motor rotates at a speed proportional to the ().
When the union purchase derrick is operated, one derrick is positioned over the quayside and the other almost vertically over the ().
For many years marine centrifuges were designed for () operation, that is the machines were run for a period during which solids accumulated in the bowlThe machine was stopped when the accumulated solids began to impair its performance.
Because of the reduced () in the vacuum boiling evaporator, some of the sea water boils as it flows through the tubes.
A cracked diaphragm in a thermostatic expansion valve will cause the valve to ().