Metallurgical Engineering
GATE MT concept:gravity PYQs
Build your understanding with focused practice from past exam papers.
How to practice concept:gravity
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–2 of 2. Imported answers require independent review unless marked reviewed.
Question 17
Open questionMTMCQ1 markNeeds review
The most effective concentration step for sulfide ores is
Your answerChoose one option.
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Open questionMTNAT2 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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