MERIT YARD

Class 11th - Mechanical Properties of Solids - MERIT YARD

Question 1 / 40Which of the following materials is most elastic?

A) Rubber

B) Glass

C) Steel

D) Copper

Question 2 / 40The SI unit of Stress is:

A) Newton

B) Pascal (N/m²)

C) Newton-meter

D) Joule

Question 3 / 40Hooke's law is valid up to:

A) Proportional limit

B) Yield point

C) Breaking point

D) Plastic limit

Question 4 / 40Young's modulus is the ratio of longitudinal stress to:

A) Volume strain

B) Lateral strain

C) Longitudinal strain

D) Shear strain

Question 5 / 40A force of 100 N is applied to a wire of area 0.1 m². The stress produced is:

A) 10 Pa

B) 100 Pa

C) 1000 Pa

D) 1 Pa

Question 6 / 40Strain is a quantity which has:

A) SI unit as Meter

B) SI unit as Pascal

C) No units and no dimensions

D) Vector direction

Question 7 / 40The reciprocal of Bulk Modulus is:

A) Compressibility

B) Rigidity

C) Viscosity

D) Elasticity

Question 8 / 40Poisson's ratio is the ratio of lateral strain to:

A) Shear strain

B) Volume strain

C) Stress

D) Longitudinal strain

Question 9 / 40If a 1m long wire is stretched by 1mm, the longitudinal strain is:

A) 0.001

B) 0.01

C) 0.1

D) 1.0

Question 10 / 40Bulk modulus is associated with change in:

A) Length

B) Volume

C) Shape

D) All of these

Question 11 / 40Modulus of rigidity is also known as:

A) Young's modulus

B) Shear modulus

C) Bulk modulus

D) Elastic limit

Question 12 / 40For a perfectly rigid body, the value of Young's Modulus is:

A) Zero

B) 1

C) Finite

D) Infinite

Question 13 / 40The energy stored per unit volume in a stretched wire is:

A) Stress × Strain

B) 1/2 × Stress × Strain

C) 1/2 × (Stress)²

D) 1/2 × (Strain)²

Question 14 / 40If stress is 10⁶ N/m² and strain is 10⁻⁴, the Young's modulus is:

A) 10² N/m²

B) 10¹⁰ N/m²

C) 10⁶ N/m²

D) 10⁴ N/m²

Question 15 / 40Materials that show large plastic range are called:

A) Brittle

B) Ductile

C) Rigid

D) Elastomers

Question 16 / 40Rubber is an example of:

A) Ductile material

B) Brittle material

C) Elastomer

D) Plastic material

Question 17 / 40The property to regain original shape is called:

A) Elasticity

B) Plasticity

C) Viscosity

D) Malleability

Question 18 / 40The value of Poisson's ratio cannot be:

A) 0.2

B) 0.4

C) 0.49

D) 0.6

Question 19 / 40Breaking stress depends on:

A) Length of wire

B) Radius of wire

C) Material of wire

D) All of these

Question 20 / 40With rise in temperature, elasticity generally:

A) Increases

B) Decreases

C) Remains same

D) Becomes infinite

Question 21 / 40Calculate the stress when a load of 50N acts on area 2 m².

A) 25 Pa

B) 100 Pa

C) 50 Pa

D) 10 Pa

Question 22 / 40Springs are made of steel because it is:

A) Highly plastic

B) More elastic than copper

C) Ductile

D) Brittle

Question 23 / 40Dimensional formula of Stress is same as:

A) Force

B) Work

C) Pressure

D) Power

Question 24 / 40The area under Stress-Strain curve represents:

A) Total force

B) Total work done

C) Energy density

D) Breaking load

Question 25 / 40Which modulus exists for all three states of matter?

A) Young's modulus

B) Bulk modulus

C) Shear modulus

D) Modulus of rigidity

Question 26 / 40Hydraulic stress results in change in:

A) Length

B) Volume

C) Shape

D) Area

Question 27 / 40After removing deforming force, the body which does not regain shape is:

A) Elastic body

B) Plastic body

C) Rigid body

D) Brittle body

Question 28 / 40Strain in a 4m long rod when it expands by 0.04m is:

A) 0.1

B) 0.01

C) 0.001

D) 0.4

Question 29 / 40Elastic after-effect is minimum for:

A) Glass

B) Quartz

C) Rubber

D) Steel

Question 30 / 40Dimensional formula of Stress is:

A) [ML⁻¹T⁻²]

B) [MLT⁻²]

C) [ML²T⁻²]

D) [M⁰L⁰T⁰]

Question 31 / 40The point at which permanent deformation starts is:

A) Fracture point

B) Yield point

C) Proportional limit

D) Elastic limit

Question 32 / 40Glass is a __________ material.

A) Brittle

B) Ductile

C) Malleable

D) Elastomer

Question 33 / 40Restoring force per unit area is called:

A) Strain

B) Stress

C) Modulus

D) Impact

Question 34 / 40Compressibility is the property of:

A) Only Solids

B) Only Fluids (Liquids/Gases)

C) Both Solids and Fluids

D) None

Question 35 / 40Young's modulus for a perfectly plastic body is:

A) Zero

B) 1

C) Infinite

D) Finite

Question 36 / 40Shear stress acts __________ to the surface.

A) Perpendicular

B) Tangentially

C) At 45°

D) From inside

Question 37 / 40Elastic fatigue is due to:

A) Low temperature

B) Repeated cycles of stress

C) High humidity

D) No stress

Question 38 / 40The modulus of rigidity for a liquid is:

A) Zero

B) 1

C) Infinite

D) Negative

Question 39 / 40Dimensional formula of Strain is:

A) [L]

B) [MLT⁻²]

C) [M⁰L⁰T⁰]

D) [ML⁻¹T⁻²]

Question 40 / 40The ratio of stress to strain is known as:

A) Viscosity

B) Modulus of Elasticity

C) Plasticity

D) Poisson's ratio