Workshop Technology
The metal is subjected to mechanical working for

Controlling the direction of flow lines
Reducing original block into desired shape
All of these
Refining grain size

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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 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
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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Workshop Technology
In a hot chamber die casting machine

Ferrous alloys with low melting temperature are casted
Ferrous alloys with high melting temperature are casted
Nonferrous alloys with low melting temperature are casted
Nonferrous alloys with high melting temperature are casted

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