Objective Questions on Extractive Metallurgy for GATE, SAIL - 2

Question: 6

Hooke's law

(A) Applies beyond limit of proportionality in stress strain curve

(B) Applies to the elastic deformation

(C) States that stress is inversely proportional to strain up to elastic limit

(D) All a, b and c

Question: 7

Heating ratio of ingot is defined as the ratio of

(A) Soaking time to heating time

(B) Track time to heating time

(C) Heating time to soaking time

(D) Heating time to track time

Question: 8

Recrystallisation of which of the following metals, can occur even at room temperature?

(A) Zinc

(B) Iron

(C) Copper

(D) Nickel

Question: 9

_____ is an operation of forging.

(A) Stretch forming

(B) Thread rolling

(C) Swaging

(D) Plug rolling

Question: 10

Which of the following has the least Young’s modulus?

(A) Steel

(B) Copper

(C) Aluminium

(D) Iron