Workshop Technology
In a four high rolling mill, the diameter of backing up rolls is ________ the diameter of working rolls.

Larger than
None of these
Equal to
Smaller than

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Workshop Technology
Lancing is the operation of

Bending a sheet of metal along a curved axis
Cutting a sheet of metal in a straight line along the length
Removal of metal to the desired shape from the edge of a plate
Cutting a sheet of metal through part of its length and then bending the cut portion

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Workshop Technology
A jolt machine is used to

Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Produce uniform sand hardness throughout the mould
Produce uniform packing of sand in the mould
Ram the sand harder at the back of the mould and softer on the pattern face

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