Moderate
The draught produced, for a given height of the chimney and given mean temperature of chimney gases_______________?
Correct answer: A. decreases with increase in outside air temperature
- A. decreases with increase in outside air temperature
- B. increases with increase in outside air temperature
- C. remains the same irrespective of outside air temperature
- D. may increase or decrease with increase in outside air temperature
Explanation
Draught depends on the density difference between outside air and chimney gases. When outside air temperature rises, its density approaches that of the gases, so the draught decreases.
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