1. How much is the percentage of fixed carbon in semi-anthracite? A. 65 - 70% B. 45 - 50% C. 80 - 90% D. 55 - 65% Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
2. How much is the percentage of fixed carbon in lignite? A. Up to 30 B. Up to 60 C. Up to 90 D. Up to 80 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
3. How much is the calorific value of lignite coal? A. 5000 kcal/kg B. 8000 kcal/kg C. 7000 kcal/kg D. 9000 kcal/kg Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
4. How much is the calorific value of semi-anthracite coal? A. 85 to 88 kcal/kg B. 850 to 880 kcal/kg C. 85000 to 88000 kcal/kg D. 8500 to 8800 kcal/kg Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
5. During conventional heating process, the heat flow in materials take place A. Surface to interior of material B. Interior to Surface of material C. Both A and B D. Neither A nor B Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
6. For every 10% increase in the excess air; the fuel consumption increases by . . . . . . . . percent. A. 0.1 B. 2 C. 5 D. 10 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
7. Higher efficiency in the combustion of solid fuel cannot be achieved by A. adopting efficient-fuel firing technique & equipment B. proper fuel preparation C. supplying correct quantity of combustion air D. keeping the flue gas exhaust temperature very high Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
8. Wobbe index' is a characteristic of A. solid fuels B. gaseous fuels C. fat coals D. liquid fuels Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
9. During combustion of gaseous fuels, deficiency of air A. does not affect the flame length B. increases the flame temperature C. tends to shorten the flame D. lengthens the flame Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
10. The refractory lining of the bottom in a basic electric are furnace in made of A. silica B. alumina C. magnesia D. fireclay Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
