A. Low ignition temperature
B. Very little ash content
C. High fusion point of its ash
D. Low adiabatic flame temperature
Related Mcqs:
- A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon _________________?
A. Is less liable to spontaneous combustion on storage
B. Is more difficult to ignite and produces a shorter flame
C. Requires smaller combustion space and less secondary air
D. None of these - A coal having high volatile matter content will ________________?
A. Give less yield of tar and gas on carbonisation
B. Burn with a small non-smoky flame
C. Have a very high calorific value
D. None of these - A coal having high amount of volatile matter____________________?
A. Would require smaller combustion chamber
B. Produces very little of tar and gas on carbonisation
C. Ignites easily and burns with long smoky flame
D. All A., B. and C. - A coal having higher volatile matter content, has lower_________________?
A. Smoking tendency on burning
B. Coke oven gas yield on carbonisation
C. Chance of catching fire during storage in open space
D. Ignition temperature - Volatile matter content in coking coal may be about _____________ percent?
A. 1
B. 7
C. 22
D. 46 - A coal having higher volatile matter content will necessarily have lower____________________?
A. Ash fusion temperature
B. Calorific value
C. Ignition temperature
D. Caking index - Coal is heated in absence of air for 7 minutes at a temperature of about ______________ °C, during its volatile matter determination for proximate analysis?
A. 550
B. 750
C. 950
D. 1150 - A coal containing very high percentage of durain is called ______________ coal?
A. Bright
B. Splint
C. Non-banded
D. Boghead - A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the_________________?
A. Presence of large quantity of hydrogen in the fuel
B. Low calorific value of the fuel
C. High sulphur content in the fuel
D. Lack of thorough mixing of fuel with air - Calorific value of coal middling generated in coal washeries during washing of coal may be around _____________ Kcal/kg?
A. 1000
B. 4000
C. 6000
D. 8000
