MI Boiler Operator Practice Questions - Michigan Boiler Operator License Exam

What does 'swell' refer to in steam boiler operation?

An apparent rise in water level when steam demand suddenly increases, caused by increased steam bubble volume Physical expansion of the boiler shell under pressure An increase in boiler capacity from higher firing rates Rising water level due to excess feedwater

Correct Answer:

An apparent rise in water level when steam demand suddenly increases, caused by increased steam bubble volume

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