Question

Cavitation in a pump creates many undesirable effects. Out of the following, which is NOT an undesirable effect created by cavitation?

• A. \(\text{Decrease in effect}\)
• B. \(\text{Increase in thrust}\)
• C. \(\text{Develops noise}\)
• D. \(\text{Develops high pressure}\)

Hint:

Cavitation causes noise, vibrations, and efficiency loss, but it does NOT increase pressure.

Answer 1

The Correct Option is D

Step 1: Understanding cavitation effects. - Cavitation occurs when local pressure drops below vapour pressure, forming bubbles that collapse violently. 
- This causes: 
- Decreased efficiency (A) 
- Increased thrust forces (B) 
- Loud noise and vibrations (C) 
Step 2: Explanation of incorrect options. 
- (A), (B), and (C) are all harmful effects of cavitation. 
- (D) High pressure is NOT an effect of cavitation; instead, cavitation leads to local pressure drop. 
Step 3: Selecting the correct option. Since high pressure is NOT a consequence of cavitation, the correct answer is (D) Develops high pressure.