For a Babcock and Wilcox boiler, what is the correct range of size of the water tubes?

For a Babcock and Wilcox boiler, what is the correct range of size of the water tubes? Correct Answer 7.62 to 10.16 cm

The correct answer is 7.62 to 10.16 cm. Babcock and Wilcox boiler has multiple water tubes as it is a multi-tube boiler. These tube join the uptake header with the down take header. These water tubes are made of mild steel.

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