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Rod mills employed for grinding | |
A. | employ a steel shell having L/D ratio of 1.5 to 3.0. [Wrong Answer] |
B. | is useful for handling sticky materials. [Wrong Answer] |
C. | employ steel rods of 2-12 cms diameter extending over full length of the mill. [Wrong Answer] |
D. | all 'a', 'b' & 'c'. [Correct Answer] |