A. Before the I.D fan
B. After the I.D. fan
C. Near the top of the chimney
D. Anywhere after the I.D. fan
Related Mcqs:
- An example of shaft furnace is the__________________?
A. L.D. converter
B. Glass melting tank
C. Blast furnace
D. Soaking pit - Pulverised fuel fired furnaces employ ______________ fuel firing?
A. Horizontal
B. Vertical
C. Tangential
D. All A., B. and C. - Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C ?
A. 5
B. 60
C. 20
D. 40 - Regenerators are installed in_______________?
A. Coke ovens
B. Open hearth furnace
C. Both A. & B.
D. Neither A. nor B. - In producer gas making furnace, steam is added along with air to mainly control the____________________?
A. Fusion of coal ash & clinker formation
B. C. V. of producer gas
C. Temperature of producer gas
D. Tar content in producer gas - Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the__________________?
A. Physical nature, ash content and fineness of the coal
B. Amount of excess air supplied and load on the boiler
C. Type of burner and combustion chamber
D. All A., B. and C. - Use of pulverised coal in boilers provides____________________?
A. Higher calorific value
B. Better combustion
C. Smokeless burning
D. Less erosion on furnace wall - In a furnace operation, which is not preheated ?
A. Solid fuels
B. Hydrocarbon containing fuel gases (e.g. coke oven gas, refinery gas etc.)
C. Both A. and B.
D. Neither A. nor B. - Ingress of cold air in the furnaces through cracks, charging doors, openings etc ________________?
A. Reduces the flue gas temperature and makes the furnace atmosphere oxidising
B. Increases the load on the induced draft fan
C. Reduces the furnace draught
D. All A., B. and C. - If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an ______________ furnace?
A. Sidefired
B. Underfired
C. Covered
D. Recirculating
