A. Carbon tetrachloride
B. Sand (40%)
C. Mineral oil of high viscosity & specific gravity (1.6)
D. None of these
Related Mcqs:
- 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 - Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of _____________________?
A. MgO & Na2CO3
B. MgSO4 & BaCl2
C. BaSO4 & NaCl
D. MgCO3 & NaCl - Washing of coal decreases its_________________?
A. Caking index
B. Mineral matter content
C. Ash content
D. Both B. and C. - Washing of coal _________________?
A. Reduces its ash & sulphur content
B. Improves its coking properties
C. Increase the fusion point of its ash by removing chlorine compounds
D. All A., B. and C. - Washing of coal does not reduce its______________________?
A. S & P content
B. Heating value
C. Fusion point of ash
D. None of these - Washing of coal is done to reduce the_________________?
A. Inherent impurities
B. Adhering impurities
C. Mineral matter
D. Both B. and C. - Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?
A. 71%
C. In between 37 & 71%
D. None of these - Coal tar fuel – 200 (CTF 200) is a mixture of __________________?
A. Pitch and creosote oil
B. Light oil and pitch
C. Anthracene and crecosote oil
D. Solar oil and pitch - 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 - Yield of coke oven gas in low temperature carbonisation of coal is about ______________ Nm3 /ton of dry coal?
A. 60
B. 160
C. 500
D. 750
