Workshop Technology
A neutral flame is obtained by supplying

Equal volumes of oxygen and acetylene
More volume of oxygen and less volume of acetylene
More volume of acetylene and less volume of oxygen
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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