Dirty generating tube surfaces may cause higher than normal superheater outlet temperatures because __________.

Correct Answer: Option A — the boiler must be over fired to maintain the required rate of steam generation

In USCG Steam Plants (Boilers & Turbines), regarding 'Dirty generating tube surfaces may cause higher than normal superheater outlet temperatures because', the verified engineering fact is: 'the boiler must be overfired to maintain the required rate of steam generation'.