WorksheetsEngineering Materials Quiz
Total questions: 20
Worksheet time: 10mins
What is the smallest repeating structure in a crystal?
Atom
Grain
Unit Cell
Lattice
Which metal has BCC structure at room temperature?
Aluminum
Copper
Iron
Silver
What is the coordination number of FCC?
6
8
10
12
Which microscope uses visible light for observation?
SEM
TEM
Optical microscope
X-ray microscope
What is the unit of Brinell Hardness Number (BHN)?
N/mm²
Kgf/mm²
No unit
mm
What is a phase in the context of engineering materials?
A mixture of gases
A region with uniform physical and chemical characteristics
A type of alloy
A non-metallic compound
What is the primary element in ferrous alloys?
Copper
Aluminum
Iron
Zinc
Why is FCC more ductile than BCC?
Fewer atoms
Higher packing efficiency
Lower density
Higher melting point
What does the term 'space lattice' refer to?
Shape of grain boundaries
3D arrangement of unit cells
Atomic weight
Crystal defects
What is the function of etching in metallography?
Clean the surface
Cut the sample
Reveal microstructure
Melt the sample
How is the Brinell Hardness Number calculated?
Load / Volume of indentation
Load / Surface area of indentation
Load / Weight
Load / Time
Why do pure metals usually have lower strength than alloys?
They have low conductivity
They lack strengthening atoms
They are always magnetic
They have high density
What is the significance of A1 temperature in Iron-Carbon Diagram?
Formation of δ ferrite
Loss of magnetism
Austenite decomposes into pearlite
Onset of melting
What does 'HRB' indicate in hardness testing?
Rockwell hardness on B scale
Brinell hardness on Rockwell scale
High resistance Brinell
Heat Resistance Base
You need a metal with high ductility for deep drawing. Choose the correct structure:
BCC
FCC
SC
HCP
You observe a crystal with atoms at corners and body center. Its structure is:
FCC
SC
BCC
HCP
Which microscope would best detect internal cracks in a turbine blade without cutting?
Optical
Ultrasonic
SEM
TEM
Why is Brinell hardness test preferred for castings?
It is cheaper
It is more accurate than Rockwell
It averages hardness over a rough or coarse surface
It is used only for soft materials
Which microstructure forms from eutectoid reaction in iron-carbon system?
Ferrite
Pearlite
Martensite
Bainite
What is the reason for using a tungsten carbide ball instead of steel in Brinell test for hard materials?
Tungsten is softer
Steel ball may deform
Looks better
It is lighter
