Question 315Steam Plants - Assistant Engineer70% to pass
When firing a boiler in local manual control, an increase in boiler load must be accompanied by a/an _______________.
AI Explanation
The correct answer is B) increase in the forced draft air pressure before an increase in the fuel oil flow.
When firing a boiler in local manual control, an increase in boiler load must be accompanied by an increase in the forced draft air pressure before an increase in the fuel oil flow. This is because the forced draft air pressure needs to be increased first to provide the necessary oxygen for the increased fuel flow, ensuring efficient combustion and preventing incomplete burning or smoke.
The other options are incorrect because A) a decrease in the forced draft air pressure is not the correct response, C) an increase in the fuel oil flow before the forced draft pressure is incorrect, and D) simultaneous increase or decrease in both parameters is also not the correct approach.
Related Questions
#313 When the flame scanner senses flame failure during boiler operation, which of the listed events will occur FIRST? #314 Combustion control systems on automatic boilers are designed to prevent immediate burner ignition after a normal or safety shutdown in order to allow time for _______________.#316 In an automatically fired boiler, the steam pressure regulator controls the supply of fuel oil to the burners by responding to variations in the _______________.#317 In automated boiler operations, a dirty flame scanner will most likely result in _______________.#318 Which of the following represents a significant system limitation to be aware of when a burner management system is operated in the 'HAND' mode?