Which of the following accentuates clinkering troubles on furnace grate burning coal ?
Correct answer: D. All A., B. and C.
- A. Low reactivity of carbonised residue containing high proportion of iron & sulphur
- B. Low forced draft & fuel bed temperature
- C. Thick firebed and preheated primary air
- D. All A., B. and C.
Explanation
Poorly reactive residue, inadequate draught, unsuitable bed conditions, a thick firebed and preheated primary air can create local reducing or high-temperature zones that fuse ash into clinker. Since all three statements describe aggravating conditions, the combined option is appropriate.
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