Question 200Steam Plants - 1st Asst/Chief

The correct answer is B) Some boiler safety interlocks are bypassed when the boiler is 'HAND' fired. When a burner management system is operated in the 'HAND' mode, certain boiler safety interlocks are intentionally bypassed to allow the operator more direct control over the burner operation. This can increase the risk of unsafe conditions, as the normal automatic safety checks are not in effect. The other answer choices are incorrect because: A) the flame failure alarm should still function in 'HAND' mode, C) the burner sequence control is not fully automatic in 'HAND' mode, and D) the burner is capable of maintaining high firing rates in 'HAND' mode, but the safety interlocks are bypassed.