Consider the following statements
1. Induced draught fan is used to handle exhaust flue gases
2. For maximum discharge, height of chimney should be higher than the height of hot gas column producing draught
3. Air preheater heats the primary air and secondary air
4. In big power plants draught is created by induced draught fans
5. Blow – cock is used to empty the boiler
Which of the statements are correct?
(a) 1, 2 and 3 (b) 2, 3 and 4 (c) 1, 3, 4 and 5 (d) 1, 2, 3 and 4