Calorific value of tar is about _____________ Kcal/kg?
A. 8800
B. 12000
C. 14000
D. 16000
Fuels and Combustion
Orsat apparatus__________________?
Orsat apparatus__________________?
A. Gives flue gas analysis on dry basis
B. Determines N2 in flue gas indirectly
C. Can’t determine CO in flue gas, if it is < 0.2%
D. All A., B. & C.
Shatter index of the coke is a measure of its___________________?
Shatter index of the coke is a measure of its___________________?
A. Strength
B. Bulk density
C. Reactivity
D. None of these
Fuel consumption in coke making can be reduced by___________________?
Fuel consumption in coke making can be reduced by___________________?
A. Preheating, blending and de-ashing the coal
B. Stamped charging of coal
C. Dry quenching of coke
D. All A., B. and C.
The cooling medium used in dry quenching of coke is___________________?
The cooling medium used in dry quenching of coke is___________________?
A. Nitrogen
B. Air
C. Phenolic water
D. Carbon dioxide
Proximate analysis of coal determines its ______________ content?
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
The maximum percentage of CO2 in a flue gas (from a carbonaceous fuel) can be_________________?
The maximum percentage of CO2 in a flue gas (from a carbonaceous fuel) can be_________________?
A. 21
B. 77
C. 79
D. 29
Yield of pitch from distillation of high temperature tar is around _____________ percent?
Yield of pitch from distillation of high temperature tar is around _____________ percent?
A. 10
B. 25
C. 65
D. 90
Hardgrove Grindability index of four coal samples are given below. Which of them is the easiest to grind ?
Hardgrove Grindability index of four coal samples are given below. Which of them is the easiest to grind ?
A. 50
B. 70
C. 85
D. 100
Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively ______________ percent?
Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively ______________ percent?
A. 3 & 10
B. 10 & 3
C. 10 & 20
D. 15 & 8