In pumping stations, 'water hammer' protection devices include:
Choose the correct answer
Only using larger pumps
Air vessels, slow-closing valves, pressure relief valves, or flywheels — all reduce rate of velocity change
Reducing pipe diameter
Removing check valves
Correct Answer
B. Air vessels, slow-closing valves, pressure relief valves, or flywheels — all reduce rate of velocity change
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
Water hammer (pressure surge on pump trip): protection by: (1) Air vessels/surge tanks (absorb pressure wave); (2) Slow-closing valves (extend closure time beyond 2L/c); (3) Pressure relief valves (release surge pressure); (4) Flywheel on pump (slow pump down gradually); (5) One-way (non-return) surge tanks. IS 7557 for pumping installations.
ScoreCardAI links this solution with subject, topic and difficulty signals so your scorecard can identify weak areas after a full mock test.
Practice more Civil Engineering questions
This MCQ belongs to JE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.