Manufacturing And Production Technology
In which of the following machine, the work is usually rotated while the drill is fed into work?

Sensitive drilling machine
Gang drilling machine
Radial drilling machine
Deep hole drilling machine

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Manufacturing And Production Technology
When the temperature of a solid metal increases,

Strength of the metal decreases but ductility increases
Both strength and ductility of the metal decreases
Both strength and ductility of the metal increases
Strength of the metal increases but ductility decreases

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