Workshop Technology
The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is

Anywhere between 0.1 to 1 percent
More than 0.3 percent
Less than 0.1 percent
Less than 0.3 percent

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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?

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

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