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Pseudocavitation occurs when the outlet port of a pump is restricted.

Air-cooled heat exchangers work best when the ambient temperature is lower than ___°F.

Electricity is the energy released by the fl ow of electrons in a conductor.

Air compressors in pneumatic systems are rated in ___.

Straight pipe threads are preferred over tapered pipe threads because of the reduced possibility of leakage.

On a schematic diagram, ___ lines are used represent pilot lines.

If heat is applied to the gas inside a receiver and the pressure remains constant, then the volume of the gas inside the receiver increases.

A flow control valve and a check valve in reverse parallel with each other is also referred to as a ___.

In Islamic belief, the angels Gabriel and Raphael immediately judge the deceased soul after death. 

For Muslims, the greatest jihad is the “jihad of the sword”. All Muslims must fight in religious wars in order to fulfill the 5 pillars of Islam.