Question 91Steam Plants - Assistant Engineer

The correct answer is D) use a small orifice burner sprayer plate to start. When raising steam on a cold boiler, it is recommended to use a small orifice burner sprayer plate to start. This allows for a gradual and controlled increase in steam pressure, which helps prevent thermal shock and damage to the boiler. Using a large orifice burner would result in a rapid increase in steam pressure, which could be dangerous and potentially damage the boiler. The other options are incorrect because: A) using a large orifice burner is not recommended, B) 24 hours is an excessively long time to raise steam, and C) raising steam within one hour or less may be too rapid and could lead to boiler damage.