Blow off cock is provided in steam boiler to ____________________?
Correct answer: B. Drain out water and sludge during its repair
- A. Guard the boiler in case of abnormal rise in steam pressure
- B. Drain out water and sludge during its repair
- C. Regulate the supply of water in boiler
- D. Put out the fire in the furnace when the water level in the boiler falls to unsafe limit
Explanation
A blow-off cock is fitted at the lower part of a boiler to discharge water containing accumulated sludge and sediment, especially during cleaning or repair. It does not regulate feedwater or directly control furnace firing.
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