Beehive coke oven________________?

Fuels and Combustion 16/01/2022

A. Facilitates by-products recovery
B. Takes 2-3 days for coking of coal but requires no external fuel for heating
C. Gives larger yield of coke (around 85%) as compared to by-product ovens
D. Produces coke with very poor strength

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    A. M40 > 78% and M10 < 10% B. M40 > 4% and M10 10% and M10 98% and M10 < 2%...
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    Higher fuel combustion efficiency cannot be achieved by_________________?
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