When burning solid fuels a ___ furnace pressure is required to keep hot gases from being expelled through openings.
A. Negative
B. Positive
C. Equal
D. None of the above
Answer: A
When burning solid fuels a ___ furnace pressure is required to keep hot gases from being expelled through openings.
A. Negative
B. Positive
C. Equal
D. None of the above
Answer: A