A. 500
B. 750
C. 950
D. 1100
Related Mcqs:
- 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 - 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 - Ash content in the coke produced from a coking coal having 20% ash may be around _____________ percent?
A. 6
B. 12
C. 18
D. 24 - 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 - Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than _______________ °C is liable to form clinker?
A. 1100
B. 1250
C. 1350
D. 1400 - Softening temperature of coal ash is a measure of the _____________ of coal?
A. Caking tendency
B. Coking tendency
C. Clinkering tendency
D. Size stability - 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 - Fusion point of coal ash increases with increase in its ____________ content?
A. Iron sulphate
B. Iron silicate
C. Lime and magnesia
D. All A., B. and C. - Ultimate analysis of coal determines its _______________ content?
A. Carbon, hydrogen, nitrogen & sulphur
B. Carbon, ash, sulphur & nitrogen
C. Carbon, sulphur, volatile matter & ash
D. Carbon, volatile matter, ash & moisture - During coking of coal, the ash content (percentage)________________?
A. Increases
B. Decreases
C. Remain constant
D. None of these
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