Chemical Engineering Mcqs

Preheating of ______________ the flame temperature?
  • (A)  The gaseous fuel before combustion decreases
  • (B)  Combustion air decreases
  • (C)  Either the fuel or the air or both, increases
  • (D)  Either the fuel or the air does not affect
High ash coals ____________________?
  • (A)  Are soft & friable (poor strength and size stability)
  • (B)  Require longer time of carbonisation as ash offers resistance to heat transfer
  • (C)  Produce larger quantity of coke oven gas
  • (D)  None of these