Manufacturing And Production Technology
Volume of a cube of side ‘l’ and volume of a sphere of radius ‘r’ are equal. Both the cube and the sphere are solid and of same material. They are being cast. The ratio of the solidification time of the cube to the same of the sphere is

(4π/6) × (r/l)²
(4π/6)² × (r/l)⁴
(4π/6)³ × (r/l)⁶
(4π/6)² × (r/l)³

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Manufacturing And Production Technology
Glazing in grinding wheels takes place when the

Wheel is too hard and wheel revolves at very slow speed
Wheel is too soft or wheel revolves at a very slow speed
Wheel is too soft and wheel revolves at a very high speed
Wheel is too hard or wheel revolves at a very high speed

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Manufacturing And Production Technology
The saw milling is an operation of

Reproduction of an outline of a template on a workpiece
Machining several surfaces of a workpiece simultaneously
Producing narrow slots or grooves on a workpiece
Producing grooves around the periphery of a cylindrical or conical workpiece

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