A centrifugal bilge pump requires priming ().
时间:2022-10-24
With reference to a two ram actuating mechanism, which one of the following statement is false?()
时间:2022-10-23
The pipe friction and the resistance will () as a result of an increase in the amount of fluid flowing through the system.
The safety valve should be () in the presence of C/E and Surveyor.
The () discharge a nearly constant amount of liquid regardless of pressure.
Which of the following may cause that excessively warm water leaves the condenser in a refrigeration plant? () (1) too little cooling water (2) too much cooling water (3) too warm cooler water
() is the production of pure water from sea water by evaporation and re-condensing.
When liquid reaches the compressor of a refrigeration system through the suction line, the condition is called ().
时间:2022-10-22
In the production of freshwater from seawater through a process of heating and cooling, the cooling phase of production is usually called ().
Freon 12 which is used to produce intense cold is normally a () when at atmospheric pressure and temperature.
When normal operating pressure is applied to the hydraulic oil used in a high-pressure system, the oil ().
What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?()
Which of the following statements is true concerning any evaporator?()
Where an excessive level of contamination is detected an alarm is sounded and diverting valves are operatedThe discharging liquid is then passed to ().
In which of the listed hydraulic systems will the installation of an oil cooler be necessary?()