WorksheetsStrength of Materials: Part A Multiple Choice Questions
Total questions: 25
Worksheet time: 1hrs 13mins
The main alloying element in cast iron is
Nickel
Carbon
Chromium
Silicon
Micro‑hardness tests are mainly used for
Soft plastics
Thin films and coatings
Cast iron
Springs
The first step in material selection is to
Select material from catalog
Define the requirements
Test all materials
Compare market prices
The hardness test suitable for soft materials like rubber is
Rockwell
Brinell
Shore
Vickers
Shape memory alloys are classified as
Conventional metals
Smart materials
Non‑metals
Composite materials
The ratio of change in length to the original length is
Stress
Strain
Rigidity
Hardness
The limit up to which a material returns to its original shape after
Elastic limit
Yield point
Ultimate point
Breaking point
The fatigue test is used to determine
Impact strength
Endurance limit
Hardness
Modulus of rigidity
The elastic limit corresponds to
Maximum strain
Limit of proportionality
Plastic region
Ultimate strength
Answer all questions under Part–A. Each question carries 1 mark. The area under the elastic portion of the stress–strain curve
Modulus of rigidity
Resilience
Ductility
Toughness
Bulk modulus is defined as
Longitudinal stress / Longitudinal strain
Volumetric stress / Volumetric strain
Shear stress / Shear strain
Stress × Strain
Proof resilience is defined as
Strain energy per unit volume up to elastic limit
Total energy absorbed before fracture
Shear energy per unit volume
Energy under plastic deformation
For a linear elastic material, energy stored is proportional to
Load
Load²
Strain
Strain²
Sudden load causes strain energy to be
Half of gradual load energy
Double of gradual load energy
Same as gradual load energy
Negligible
In engineering practice, Poisson’s ratio for steel is approximately
0.25
0.3
0.35
0.5
Polar modulus (Zp) is used to calculate
Axial stress
Bending stress
Torsional stress
Shear stress only
Maximum shear stress in a hollow shaft occurs at
Inner surface
Outer surface
Mid‑radius
Neutral axis
Shear strain in a shaft under torque is
τ / G
G / τ
τ × G
τ² / G
Shear stress distribution in a circular shaft is
Uniform
Linear from center to surface
Maximum at center
Zero at surface
For same material and weight, hollow shafts transmit
Less torque
More torque
Same torque
Zero torque
Stiffness of a spring is defined as
Load × Deflection
Deflection / Load
Load / Deflection
Torque / Angle
Thin cylinders are used in
Boilers
Pipes
Storage tanks
Air receivers
Open coiled helical springs are mainly used to
Absorb shock loads
Transmit torque
Support axial load only
Support bending load
A spring stores 200 J of energy when deflected 10 mm. Its stiffness is
2000 N/m
4000 N/m
20000 N/m
40000 N/m
Energy stored in a spring is maximum when
Load applied gradually
Load applied suddenly
Load applied slowly
No load applied
