A. 2000
B. 700
C. 1100
D. < 500
Related Mcqs:
- Low temperature carbonisation of coal takes place at _______________ °C ?
A. 300
B. 1100
C. 700
D. 900 - The main product of high temperature carbonisation of coal is_____________________?
A. Coke
B. Ammonia
C. Tar
D. Phenol - The yield of tar from high temperature carbonisation of dry coal is about _______________ percent?
A. 3
B. 12
C. 22
D. 0.3 - High temperature carbonisation of coal produces _____________________ ?
A. Inferior coke compared to low temperature carbonisation
B. Less of gases compared to liquid products
C. Larger quantity of tar compared to low temperature carbonisation
D. None of these - Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of __________________?
A. 4 kgf/cm2 & 500°C
B. 10 kgf/cm2 & 1000°C
C. 40 kg/cm2 & 200°C
D. 100 kgf/cm2 & 500°C - Sudden temperature fluctuation does not affect pyrex glass, because of its __________________?
A. Low co-efficient of expansion
B. High co-efficient of expansion
C. High melting point
D. Both B. and (C) - Refractory bricks burnt at very high temperature have got______________?
A. Greater resistance to corrosion by slags
B. Less resistance to corrosion by slags
C. High spalling tendency
D. None of these - Hydrogenation of oil takes place in a/an ____________________ reactor ?
A. Autothermal
B. Trickle bed
C. Plug flow
D. None of these - Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because__________________?
A. Its calorific value is very less
B. Tar neutralises the residual acids present in pitch
C. It reduces viscosity and imparts fluidity for its transportation through pipelines at economic
pressure drop
D. All A, B. and C. - A good quality coal should have ______________________?
A. Low fusion point of ash
B. High ash content
C. High sulphur content
D. None of these
