A. Calorific value
B. Caking power
C. Both A. & B.
D. Neither A. nor B.
Related Mcqs:
- 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. - 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 - 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 - 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 - With increase in moisture content of coal, its___________________?
A. Calorific value increases
B. Caking properties diminish
C. Swelling during carbonisation becomes excessive
D. None of these - With increase in moisture content of coal, its_____________________?
A. Calorific value increases sometimes
B. Bulk density always decreases
C. Clinkering tendency during combustion increases
D. None of these - Oxygen content in a flue gas was found to be 4%. It implies that excess air used for combustion was around ______________ percent?
A. 4
B. 96
C. 20
D. 40 - A good coking coal should have high ______________ content?
A. Ash
B. Sulphur & phosphorus
C. Moisture
D. None of these - Gas yield in the Kopper-Totzek coal gasifier is about ______________ Nm3/ton coal (ash = 35%)?
A. 150
B. 1500
C. 3500
D. 5000 - Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an ______________ bed gasifier?
A. Entrained
B. Moving
C. Fixed
D. Fluidised
