Q.

What is the advantage of having smaller ratio of water to steam space?

A. steam can be generated at a faster even if the boiler is cold
B. increases the rate of evaporation
C. water is made cyclic, i.e., from boiler drum to water tube and back to drum
D. helps in mobilizing the boiler
Answer» A. steam can be generated at a faster even if the boiler is cold
Explanation: rate of evaporation is more as area of heating surface is more due to presence of large small diameter tubes. due to that smaller water ratio is allowed to steam space where in the steam can be generated as a faster rate even if the boiler is cold. as the rate of evaporation is more, it is preferred in steam power plants for power generation.
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