Chance of occurrence of cavitation are high if the

Explanation:

• Cavitation is the phenomenon of the formation of vapour bubbles of a flowing liquid in a region where the pressure of the liquid falls below the vapour pressure and sudden collapsing of these vapour bubbles in a region of higher pressure. 
• When the vapour bubbles collapse, very high pressure is created. 
• The metallic surfaces, above which the liquid is flowing, is subjected to these high pressure which causes pitting action on the surface.
• Thus cavities are formed on the metallic surface and hence the name is cavitation.
• In centrifugal pumps, the cavitation may occur at the inlet of the impeller of the pump or at the suction side of the pumps, where the pressure is considerably reduced.
• Hence if the pressure at the suction side of the pump drops below the vapour pressure of the liquid then the cavitation may occur.