Objective Questions on Extractive Metallurgy for GATE, SAIL - 1

Question: 1

A material used for extrusion purpose must possess the following mechanical property.

(A) Brittleness

(B) Elasticity

(C) Ductility

(D) Plasticity

Ans: D


Question: 2

_____ base alloys is susceptible for magnetic particle method of testing.

(A) Nickel

(B) Copper

(C) Aluminium

(D) Magnesium

Ans: A


Question: 3

Which fuel gas is commonly used for hot machine scarfing of slabs?

(A) Acetylene gas

(B) Blast furnace gas

(C) Coke oven gas

(D) None of these

Ans: C

Coke oven gas

Question: 4

_____ is not suitable for impact load.

(A) Cast iron

(B) Chrome steel

(C) High carbon steel

(D) Mild steel

Ans: A

Cast iron

Question: 5

Work hardening of metals

(A) Increases ductility

(B) Decreases ductility

(C) Decreases tensile strength

(D) Does not affect ductility

Ans: A

Increases ductility

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