Assignment IWDT 211
Quiz by Mustajab Abbasi
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- Q1
Which of the following is NOT one of the five main categories of materials
Metals and Alloys
Liquids
Ceramic
polymers
30s - Q2
What crystal structure does iron have at room temperature
Body-Centered-Cubic (BCC)
Simple Cubic
face -centered -cubic (FCC)
Hexagonal-Closed-Packed (HCP)
30s - Q3
Which material property makes copper suitable for electrical conductor wire?
High melting point
Low density
High hardness
High electrical conductivity
30s - Q4
4. At what temperature does iron change from BCC to FCC structure?
1400°C
910°C
850°C
1000°C
30s - Q5
Which of the following is an example of a composite material? a) Aluminum b) Glass c) Fiberglass d) Silicon
Fiberglass
Silicon
Aluminum
Glass
30s - Q6
What does the term "amorphous" mean in materials science?
Having a regular, periodic arrangement of atoms
Being electrically conductive
Having no regular, periodic arrangement of atoms
Being extremely hard
30s - Q7
Which processing technique involves heating and cooling metals to change their properties? a) Cold working b) Heat treatment c) Machining d) Casting
Machining
Heat treatment
Cold working
Casting
30s - Q8
What is the length scale range for nanostructure?
Greater than 100 μm
1 to 100 nm
100 to 100,000 nm
1 to 10 Å
30s - Q9
Which material is commonly used for optical fibers? a) Copper b) Aluminum c) High purity silica glass d) Steel
Steel
High purity silica glass
Aluminum
Copper
30s - Q10
What happens to most metals when they are cold worked at room temperature?a) They become softer b) They become harder and more brittle c) They lose their crystal structure d) They become more ductile
They become harder and more brittle
They lose their crystal structure
They become more ductile
They become softer
30s - Q11
Ceramics are generally good electrical and thermal conductors.
falsetrueTrue or False30s - Q12
An alloy is a metal that contains additions of one or more metals or non-metals.
truefalseTrue or False30s - Q13
Thermosetting polymers are more brittle than thermoplastic polymers.
truefalseTrue or False30s - Q14
Glass is a crystalline material with regular atomic arrangements.
falsetrueTrue or False30s - Q15
Hot working of metals occurs below the recrystallization temperature.
falsetrueTrue or False30s