GATE MT · 2020 · MT
Question 47: metallurgy
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Question 47
MTNAT2 marksNeeds review
For effective communition in a ball mill, it is desired that the balls travelling along the mill wall leave the wall at point C and travel freely in air along the path CDA, as shown in the figure. If
is 120°, the rotational speed of the mill is ______ rpm (round off to one decimal place) by performing suitable force balance at point C.Assume:
There is no slip between the ball and mill wall.
O is the rotational axis of the mill and OB is parallel to the vector
.Inner diameter of ball mill is 3.26 m.
Acceleration due to gravity g is 9.8 m·s
.
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2020MT
GATE MT 2020 · Paper 1
Metallurgical Engineering · Original paper archive
- Section
- Metallurgical Engineering
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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