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
Plasticity
Question: 2
_____ base alloys is susceptible for magnetic particle method of testing.
(A) Nickel
(B) Copper
(C) Aluminium
(D) Magnesium
Ans: A
Nickel
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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