Question 176Steam Plants - Assistant Engineer70% to pass
A heavy accumulation of soot on the fireside of the superheater can cause a _______________.
AI Explanation
The correct answer is C) low superheater outlet temperature because of the insulating effect of soot.
The explanation is as follows:
A heavy accumulation of soot on the fireside of the superheater acts as an insulating layer, reducing the heat transfer from the hot flue gases to the steam flowing through the superheater. This insulating effect caused by the soot buildup results in a lower superheater outlet temperature, as less heat is being transferred to the steam.
The other options are incorrect because: A) high superheater outlet temperature due to gas laning is not the result of soot buildup, B) high superheater outlet temperature due to reduced steam flow is not the direct effect of soot buildup, and D) high superheater inlet temperature due to decreased heat transfer is the opposite of the correct effect.
Related Questions
#174 Which of the listed conditions can cause high superheater outlet steam temperature in an automated boiler? #175 If a pressure drop does not exist across the superheater in a steaming boiler _______________.#177 Coast Guard Regulations #178 The MAWP of a boiler is 900 psi and the normal drop across the superheater is 20 psi. If the superheater safety valve is set to lift at 825 psi, the minimum settings of the drum safety valves allowed by Coast Guard Regulations would be _______________.#179 If the maximum steam generating capacity of a boiler is increased Coast Guard Regulations