A shearer is deployed in a mine where the specific energy consumption for cutting coal is 800 kJ/m3. The specific gravity of coal is 1.2. If the machine produces 700 te/h, the electrical power consumption in kW of the shearer at 65% motor efficiency is
A. 149.4
B. 199.4
C. 219.4
D. 239.4
Answer: Option B
This Question Belongs to Mining Engineering >> Introduction To Mining Engineering
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It is very difficult to control shaley roof if coal is not left with the shale why?
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