What is stress in a material?
A Energy stored per unit volume
B Temperature change
C Force per unit area
D Strain per unit area
What does Hooke’s Law relate?
A Stress and strain
B Stress and temperature
C Strain and energy
D Force and area
What is the unit of strain?
A N
B m/m
C N/m²
D Pa
What is plasticity in materials?
A Ability to return to the original shape
B Ability to resist bending
C Ability to deform without breaking
D Ability to absorb shock
What does Poisson’s ratio describe?
A Stress ratio
B Strain ratio
C Ratio of tension to compression
D Ratio of lateral strain to axial strain
Which of these stresses is caused by torsion?
A Compressive Stress
B Shear Stress
C Tensile Stress
D Bending Stress
What is the modulus of elasticity (E)?
A Force per unit area
B Ratio of stress to strain
C Strain per unit area
D Work done per unit volume
What is the primary characteristic of a brittle material?
A Low ductility
B High elongation
C High toughness
D Low strength
What does the shear force diagram represent in beam analysis?
A Axial force along the beam
B Distribution of bending moments
C Internal forces acting on the beam
D External loads applied to the beam
What does creep refer to in materials?
A Slow deformation under constant stress
B Rapid deformation under stress
C Sudden fracture due to stress
D Deformation due to heat changes
What is the primary cause of failure in brittle materials?
A Excessive strain
B High toughness
C High ductility
D Excessive stress
What is the deflection of a beam?
A Angle of inclination
B Change in shape under temperature
C Vertical displacement under load
D Rotational motion due to stress
Which of the following is true about stress‐strain curves?
A They are the same for all materials
B They plot stress versus strain for a material under load
C They show the relationship between force and energy
D They are only valid for plastic materials
What is fatigue in materials?
A Deformation due to stress over time
B Resistance to high temperatures
C Sudden failure due to excessive force
D Deformation caused by high-speed loading
What is a column’s buckling?
A Plastic deformation under compression
B Sudden failure due to excessive axial load
C Deformation caused by lateral forces
D Elastic deformation under compression