Metallurgical Engineering > GATE 2024 > Mechanical Behavior
For rolling of slabs, determine the correctness or otherwise of the following Assertion [a] and Reason [r].
Assertion [a]: Grooves are made on the surface of the rolls parallel to their roll axes to achieve large thickness reduction in a short time.
Reason [r]: Given μ is the coefficient of friction between the rolls and the slab, and α is the angle of bite between the entrance plane and the centerline of the rolls, unaided entry of slab in the rolls can take place only if μ < tan α.
Assertion [a]: Grooves are made on the surface of the rolls parallel to their roll axes to achieve large thickness reduction in a short time.
Reason [r]: Given μ is the coefficient of friction between the rolls and the slab, and α is the angle of bite between the entrance plane and the centerline of the rolls, unaided entry of slab in the rolls can take place only if μ < tan α.
Correct : b
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