Question 318Steam Plants - Assistant Engineer

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. This allows the operator to manually control the burner, but also means that some automatic safety systems are disabled, which can pose a risk if not properly monitored. The other answer choices are incorrect because: A) The burner's firing rate capabilities are not affected by the 'HAND' mode, C) The burner sequence control is not fully automatic in 'HAND' mode, and D) The flame failure alarm should still function even when the boiler is 'HAND' fired.