Higher fuel combustion efficiency cannot be achieved by
(A) Preheating of fuel gases & combustion air
(B) Reducing sulphur content in the fuel
(C) Adopting proper fuel firing technique & fuel preparation
(D) Supplying correct amount of combustion air
(A) Preheating of fuel gases & combustion air
(B) Reducing sulphur content in the fuel
(C) Adopting proper fuel firing technique & fuel preparation
(D) Supplying correct amount of combustion air