Related Questions

Carbon content of pitch (residue of coal tar distillation) is around __________ percent.
A 70
B 55
C 80
D 94
Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent.
A 10 & 3
B 3 & 10
C 15 & 8
D 10 & 20
Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent.
A 5
B 25
C 55
D 75
The yield of tar from high temperature carbonisation of dry coal is about __________ percent.
A 3
B 12
C 22
D 0.3
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 of the above
Light oil whose major component is benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C.
A 80-170
B 200-300
C 250-270
D 280-300
Which of the following property sets pitch or tone (high or low) for the synthesized speech when reading an element; the pitch may be specified absolutely or relative to the normal pitch for the voice-family used to read the text?
A voice-check
B voice-format
C voice-pitch
D voice-volume
Which of the following is not a product of tar distillation?
A Phenol & naphthalene
B Benzol & pitch
C Anthracene & creosote
D None of these
The terminology 'BTX' used in coal tar distillation industry refers to
A Benzol-toluol-xylol
B Benzol-toluene-xylene
C Benzene-toluol-xylol
D Benzene-toluene-xylene
Which of the following is not a product of coal tar distillation?
A Anthracene
B Cresote oil
C Carbolic oil
D None of these

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