Engineering Materials MCQs

Question 1

The crystal structure of gamma iron is

Accepted Answer

Face centered cubic

Answer

Body centered cubic

Answer

Hexagonal close packed

Answer

Cubic structure

Question 2

The coke in the charge of blast furnace

Accepted Answer

Supplies heat to reduce ore and melt the iron

Answer

Controls the grade of pig iron

Answer

Acts as an iron bearing mineral

Answer

Forms a slag by combining with impurities

Question 3

The crystal of alpha iron is

Accepted Answer

Body centered cubic

Answer

Face centered cubic

Answer

Hexagonal close packed

Answer

Cubic structure

Question 4

Which of the following alloys does not contain tin?

Accepted Answer

White metal

Answer

Solder admiralty

Answer

Fusible metal

Answer

Phosphor bronze

Question 5

Railway rails are normally made of

Accepted Answer

High carbon

Answer

Mild steel

Answer

Alloy steel

Answer

Tungsten steel

Question 6

A specimen of aluminium metal when observed under microscope shows

Accepted Answer

F.C.C. crystal structure

Answer

B.C.C. crystalline structure

Answer

H.C.P. structure

Answer

A complex cubic structure

Question 7

The correct sequence for descending order of machinability is

Accepted Answer

Grey cast iron, low carbon steel, wrought iron

Answer

Low carbon steel, grey cast iron, wrought iron

Answer

Wrought iron, low carbon steel, grey cast iron

Answer

Wrought iron, grey cast iron, low carbon steel

Question 8

The ability of a material to resist fracture due to high impact loads, is called

Accepted Answer

Toughness

Answer

Strength

Answer

Stiffness

Answer

Brittleness

Question 9

Brass (alloy of copper and zinc) is an example of

Accepted Answer

Substitutional solid solution

Answer

Interstitial solid solution

Answer

Intermetallic compounds

Answer

All of the above