Workshop Technology
Swab is used for

Cleaning the moulding sand
Smoothing and cleaning out depressions in the mould
Reinforcement of sand in the top part of the moulding box
Moistening the sand around the edge before removing pattern

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Workshop Technology
A progressive limit gauge has

Separate 'Go' and 'Not go' members
'Go' and 'Not go' member on the same side of the gauge
'Go' member at one end and 'Not go' member at the other end
None of the listed here

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

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