A. 550
B. 750
C. 950
D. 1150
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 - Coal is heated in presence of air to a temperature of about _______________ °C, while determining its ash content for proximate analysis?
A. 500
B. 750
C. 950
D. 1100 - Proximate analysis of coal determines its ______________ content?
A. Moisture, ash, sulphur & volatile matter
B. Moisture, volatile matter, ash & fixed carbon
C. Moisture, sulphur, nitrogen & fixed carbon
D. None of these - When the coal is heated in absence of air, it is called its ________________?
A. Deoxidation
B. Gasification
C. Coalification
D. Carbonisation - The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always ___________________?
A. 1
B. < 1
C. > 1
D. Unpredictable - 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 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 - 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
