GATE Metallurgical Engineering Practice Quiz

Question 1

In flat rolling, the angle at which the workpiece first contacts the rolls is called the:

Accepted Answer

Bite (contact) angle

Question 2

The neutral (no-slip) point in the roll gap is where:

Accepted Answer

The surface velocities of the roll and the strip are equal

Question 3

The maximum possible draft in rolling without slipping is governed by:

Accepted Answer

The coefficient of friction and the roll radius ($\Delta h_{max}=\mu^2 R$)

Question 4

Hot rolling differs from cold rolling chiefly in that hot rolling:

Accepted Answer

Occurs above the recrystallization temperature, so the metal does not strain-harden permanently

Question 5

Roll flattening (elastic deformation of rolls) tends to:

Accepted Answer

Increase the contact arc length and the rolling force required

GATE Metallurgical Engineering Group Discussion