Optimum ratio of operating speed to critical speed of a trommel is____ – McqOptions

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1.	Optimum ratio of operating speed to critical speed of a trommel is_____________________?
A.	0.33-0.45
B.	1.33-1.45
C.	0.5-2
D.	1.5-2.5
Answer» B. 1.33-1.45

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