Workshop Technology
In blanking operation, the clearance is provided on

Punch
Half on the punch and half on the die
Die
Either on punch or die depending upon designer's choice

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Workshop Technology
For arc welding

Any one of these
Direct current is used
Alternating current with high frequency is used
Alternating current with low frequency is used

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Workshop Technology
Notching is the operation of

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

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Workshop Technology
A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?

The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction
Any one of the above
The bottom and middle roll rotate in the same direction
The upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction

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