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When a fluid flows through various cross-sections, the Cavitation occurs because of:

When a fluid flows through various cross-sections, the Cavitation occurs because of: Correct Answer Low pressure

Explanation:

Cavitation is the phenomenon of formation of vapour bubbles of a flowing liquid in a region where the pressure of the liquid falls below the vapour pressure of the fluid and sudden collapsing of these bubbles in the region of higher pressure.

In centrifugal pumps, the cavitation may occur at the inlet of the impeller of the pump or at the suction side of the pump where the pressure is considerably low. So to avoid cavitation pressure on the suction side should be high. 

Cavitation in turbine: In reaction turbine (Francis Turbine) the cavitation may occur at the outlet of the runner or at the inlet of the draft tube where the pressure is considerably reduced.

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