GATE PI 2015 | Metal Forming Process Question 7 | Metal Forming

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GATE PI 2015

MCQ (Single Correct Answer)

-0.3

In rolling of a flat strip, the relative velocity of strip with respect to the roller is

positive at entry plane, negative at exit plane

negative at entry plane, positive at exit plane

positive throughout from entry to exit plane

negative throughout from entry to exit plane

GATE PI 2015

Numerical

-0

The maximum reduction per pass during wire drawing of an aluminium alloy ignoring friction and redundant work is $$77\% $$. The strain hardening exponent of the material is ______________.

Your input ____

GATE PI 2014

MCQ (Single Correct Answer)

-0.3

In an open die forging, a circular disc is gradually compressed between two flat plates. The exponential decay of normal stress on the flat face of the disc, from the center of the disc towards its periphery, indicates that

there is no sticking friction anywhere on the flat face of the disc.

sticking friction and sliding friction and sliding friction co-exist on the flat face of the disc

the flat face of the disc is friction-less

there is only sticking friction on the flat face of the disc.

GATE PI 2014

MCQ (Single Correct Answer)

-0.3

A moving mandrel is used in

wire drawing

forging

tube drawing

bending