Workshop Technology
The advantage of Thermit welding is that

Results in a minimum problem with internal residual stresses
All parts of the weld section are molten at the same time
Weld cools almost uniformly
All of these

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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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