A balanced draught boiler furnace employs __________ draught fan.

1.	A balanced draught boiler furnace employs __________ draught fan.
A.	induced
B.	forced
C.	both 'a' & 'b'
D.	neither 'a' nor 'b'
Answer» D. neither 'a' nor 'b'

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A balanced draught boiler furnace employs __________ draught fan.

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