Cavitation is likely to occur if 1. Pressure becomes very high. 2. Temperature becomes low. 3. Pressure at the specific point falls below vapour pressure. 4. Energy is released with the onset of a high intensity wave due to noise and vibration of the machine. Which of the above statements are correct?

Option 3 : 3 and 4

Explanation:

Cavitation occurs when the liquid in a pipe turns to a vapour at low pressure. When Cavitation takes place, air bubbles are formed at low pressure. As the liquid passes from regions of low pressure to higher pressure, the air bubbles explode. This air bubble may also get exploded hen flow passes to high-temperature regions or reaches to point where noise and vibration of the machine are occurring. This creates a shockwave that hits the pipe and leading to the development of a crack in pipe surface.

Note:

Prevention of Cavitation:

1. Lower the temperature.

2. Raise the liquid level in the suction vessel.

3. Increase the diameter of the pipe.