Capacity of a conveyor is designed based on the coal consumption of the boilers and per day working of conveyor upto a. 16 hours at rated capacity ... d. 10 hours at rated capacity 8. The recommended inclination of coal conveyor belt for uncrushed coal is limited to a. 15 degrees b. 10 degrees c. 12 degrees d. 20 degrees 9. Time taken to unload ... In 1990, coal-fired power plants accounted for about 42% of total U.S. utility-scale electricity generating capacity and about 52% of total electricity generation. By the end of 2020, coals share of electricity generating capacity was at 20% and coal accounted for 19% of total utility-scale electricity generation.