1A) Two boilers are used to deliver steam into a common pipeline. The pressure in the boilers and in the common pipeline is 10 bar. Boiler-1 generates dry steam and the temperature of steam in the common pipeline is 200C. If boiler-1 supplies 2kg of steam as compared to 4 kg from boiler-2, what is the condition of steam generated by boiler-2? Also find the related parameter of steam. 1B) A steam boiler generates steam at the rate of 3000kg per hour at 0.5 MPa and 230C and is fed with coal at the rate of 1500 kg/hr which has a calorific value of 24 MJ/kg. The water is fed to the boiler at a temperature 25C. If the boiler performance is to be enhanced by 10% by preheating feed water by 5C, what will be the percentage reduction in coal consumption? 1C) Explain the devices used to recover the waste exhaust gas heat coming out from the steam boiler furnace for preheating of air and feed water.