A. increase thermal efficiency of boiler
B. economise on fuel
C. extract heat from the exhaust flue gases
D. increase flue gas temperature
E. to heat feed water by bled steam
A. correct fuel air ratio
B. proper ignition temperature
C. 02 to support combustion
D. all the three above
E. none of the above
A. Higher calorific value at constant volume
B. Lower calorific value at constant volume ,
C. Higher calorific value at constant pressure
D. Lower calorific value at constant pressure
E. None of the above
A. carbon, hydrogen, nitrogen, sulphur, moisture
B. fixed carbon, ash, volatile matter, moisture
C. higher calorific value
D. lower calorific value
E. rough analysis
A. entropy
B. enthaply
C. pressure
D. temperature
E. all of the above
A. desirable
B. economical
C. essential
D. optional
E. uneconomical
A. boiler drum
B. superheater tubes
C. economiser
D. a separate coil
E. a separate coil located in convection path
A. higher value
B. lower value
C. same value
D. any value
E. none of the above
A. more
B. less
C. equal
D. may be more or less depending on capacity of reheater
E. none of the above
A. from a metal wall from one medium to another
B. from heating an intermediateanaterial and then heating the air from this material
C. by direct mixing
D. heat is transferred by bleeding some gas from furnace
E. none of the above