The common characteristics of building material under stress are given under List 1 and the corresponding properties are given under List 2. Match the items under List 1 with those under List 2.

Discussion - Material Properties MCQ

List 1 (Property)

A. Ductility
B. Brittleness
C. Toughness
D. Malleability

List 2 (Description)

1. Material can withstand heavy shock loads
2. Material can be hammered into sheets without rupture
3. Material can be drawn out into wires without necking down
4. Material fail suddenly without warning

A. A-3, B-4, C-1, D-2

B. A-2, B-3, C-4, D-1

C. A-3, B-4, C-2, D-1

D. A-2, B-4, C-1, D-3

Correct Answer: A. A-3, B-4, C-1, D-2

🔬 Understanding Key Mechanical Properties

This question tests the fundamental definitions of mechanical properties that describe how a material behaves under stress. Understanding these terms is crucial for selecting the right material for any engineering application.

⚖️ Detailed Matching of Properties and Descriptions

Let's break down each property from List 1 and find its correct description in List 2.

A. Ductility → 3. Material can be drawn out into wires...

Ductility is the ability of a material to undergo significant plastic deformation under tensile stress before fracturing. The classic example of this is drawing a material into a thin wire. Gold and copper are highly ductile materials.

B. Brittleness → 4. Material fail suddenly without warning

Brittleness is the opposite of ductility. A brittle material shows little to no plastic deformation before it fractures. When it reaches its limit, it fails suddenly and catastrophically, often shattering. Glass and cast iron are classic examples of brittle materials.

C. Toughness → 1. Material can withstand heavy shock loads

Toughness is a material's ability to absorb energy and plastically deform without fracturing. It is a measure of resistance to fracture when subjected to a sudden impact or shock load. A tough material can take a hit, whereas a brittle material would shatter. Mild steel is a tough material.

D. Malleability → 2. Material can be hammered into sheets...

Malleability is the ability of a material to undergo significant plastic deformation under compressive stress. The classic example is hammering or rolling a material into thin sheets without it cracking or rupturing. Gold is the most malleable metal.

💡 Study Tips for Material Properties

Ductility = Drawing into Wires: Think of "ducts" or tubes, which are similar in shape to wires.
Malleability = Hammering with a Mallet: The word "malleability" comes from the same root as "mallet," making it easy to remember it's about hammering into sheets.
Brittleness = Breaks Suddenly: Brittle materials break easily and without warning.
Toughness = Takes a Hit: A tough material can withstand shock and impact. Think of a "tough guy" who can take a punch.