Air entering an air-cooled refrigeration system is indicated by ().
时间:2022-11-02
Which of the following pumps are self-priming, and can deal with liquid from a level below the pump() (1) ejector (2) screw (3) centrifugal
时间:2022-11-01
Through a () pump, the liquid is transferred from the suction to the discharge by the mechanical variation of the volume of a chamber or chambers.
When air becomes trapped in the hydraulic fluid of a steering system, the ().
Moisture is removed from a refrigeration system by().
If a refrigeration compressor is running continuously without lowering temperature as normal in the refrigerator, the trouble may be ().
The lowest temperature required to cause self-sustained combustion of a substance independent of any outside source of ignition is called ().
时间:2022-10-31
Among the basic categories of equipment, which of the following are used to convert mechanical into hydraulic energy?()
The process of removing moisture from air is known as().
Sub-cooling is a method of reducing the temperature of the liquid refrigerant below its ().
The pressure head of a water pump is given in the unit of ().
时间:2022-10-30
A fluid coil will () large quantifies of heat when it changes state from a liquid to a vapor.
These include deck machinery such as mooring equipment, anchor handling equipment, cranes and ().
Which of the listed operations will cause an automatically controlled refrigeration compressor to restart?()
The heat used to change a liquid to a vapor is called ().