In a domestic fresh water system, the pump starters are controlled by （） switches which operate when the pressure in the tank varies within predetermined limits as water is drawn off.
The master got permission to pump out 500 tons of clean sea water for （）.
Cooling water pumps driven by direct reversing diesel engines are usually of the straight impeller vane type pump with a concentric housing to（）
The pump used to send the bilge water into the oily water separator（）the mixture because this might create finer oil particles.
The reciprocating pump can’t draw water from a tank may be caused by （）.
The motor for the fresh water pump （）.
Which of the following pumps is most suitable for an oily water separator?（）
About the jacket water, that of the auxiliary engines usually（） is circulated by pumps, and the main engine usually （）
The fire pumps must be capable of delivering a total quantity of water at a defined head, not less than （） of the total bilge pumping capacity.
With a vacuum boiling evaporator, the remainder of sea water fed to the evaporator is pumped out by （）.
In a vacuum boiling evaporator, the fresh water generated is pumped out by （）.
You are unable to pump out the aft starboard engine room bilge well that is fouled, with one foot of water over the top of the bilge well, what action should be carried out?（）
A centrifugal pump can’t supply water after startingYou should check （）.
Sea water temporarily pumped into tanks to simulate the increased vertical loading of environmental forces is termed（）.
Water pump的中文意思是（）。
A water pump can not supply water after startingIt may be caused by （）.
The pressure head of a water pump is given in the unit of （）.
Permission is requested to pump out about 200 tons of clean sea ballast water for （） purposes．
（） provides the head or pressure to supply the domestic water where required.
If you were operating a centrifugal water service pump with worn wearing rings, the （）.
If an operating bilge pump is developing good vacuum, but is unable to discharge any water, which of the following problems is the most probable cause?（）
As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: （） (1) secure oil to fires (2) increase feed pump pressure
What’s the most obvious difference among animal-driven chain pump, water-driven chain pump and wind-driven chain pump?
As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: (1) secure oil to fires; (2) increase feed pump pressure.
