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What is the capacity of Benson boiler?

(a) 180 tonnes/hr & above

(b) 150 tonnes/hr & above

(c) 250 tonnes/hr & above

(d) 300 tonnes/hr & above

The question was asked in my homework.

This intriguing question comes from Types of High Pressure Boilers topic in portion Steam Generators & Accessories of Energy Engineering

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The correct choice is (b) 150 tonnes/hr & above

Explanation: Feed water from the hot-well is forced through the economizer tubes. The hot water enters the radiant section of the evaporator tubs and then passes through convective section of the evaporator tubes. Since the boiler has no drum, thee steam generated in the evaporator enters the super heater tube where it is heated above the critical pressure. So the Steam rising capacity of the boiler is 150 tonnes/hr & above.

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