Workshop Technology
The adhesiveness is the property of sand due to which

The sand grains stick together
It clings to the sides of a moulding box
None of these
It evolves a great amount of steam and other gases

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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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