Boiler Operation Engineer Interview Question - 26
Q. Why does the boiler backfire ?
Ans.
Back firing of boiler is due to:
1.Unbalanced draught
2.Reduced speed of ID fan or more speed of FD fan
3.Improper locking of fans damper (which may disturb in fan running due to air pressure)
4.Sudden trip of ID fan or closing of damper
5.High moisture fuel
6.More excess air
7.Jamming of APH
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Most Important Steam Blowing Questions Asked In Central BOE Interview
How it is been decided that RHS or LHS safety valve of steam drum is set at higher pressure ?
Why economiser is kept at the top of the boiler ?
How do you identify the leakage of economiser tube
Can the blades of FD fan be replaced by the ID fan blades?
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What are the salts present in the raw water ?
What are the reasons for lifting of steam drum safety valve ?
Possible reasons for higher main steam temperature ?
What are the causes of higher flue gas outlet temperature of boiler ?
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