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
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 higher volatile matter content will necessarily have lower____________________?
A. Ash fusion temperature
B. Calorific value
C. Ignition temperature
D. Caking index - 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 - Volatile matter content in coking coal may be about _____________ percent?
A. 1
B. 7
C. 22
D. 46 - Mineral matter content (M) and ash content A. in coal are approximately related as _______________?
A. M = 1.1A
B. M = A
C. M = 1.5A
D. M = 2A - Volatile matter content of metallurgical coke may be around ______________ percent?
A. 1-2
B. 10-15
C. 22-26
D. 30-33 - 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 high amount of volatile matter will have__________________?
A. Low ignition temperature
B. Very little ash content
C. High fusion point of its ash
D. Low adiabatic flame temperature - 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. - 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
