Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about _______________ percent?

Correct answer: B. 25

A. 5
B. 25
C. 55
D. 75

Explanation

In the usual coke-oven-gas recovery sequence, the primary cooler removes roughly one-quarter of the total tar; much of the remaining tar mist is recovered later in electrostatic precipitators. Thus the approximate figure is 25%.

Written and checked by Zahid Hussain, MS Computer ScienceLast updated 18 September 2026

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Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about _______________ percent?

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