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WorksheetsMechanics of Materials Quiz unit 1
Total questions: 30
Worksheet time: 15mins
The SI unit of stress is:
Pascal
Newton
Meter
Kilogram
The ratio of lateral strain to longitudinal strain is called
Young’s modulus
Poisson’s ratio
Bulk modulus
Rigidity modulus
A rod of length 2 m is stretched by 1 mm. The strain produced is:
0.0005
0.001
0.005
0.05
Stress is defined as the force acting per unit
Length
Cross-sectional area
Volume
Weight
If a force of 2000 N acts on an area of 20 mm², the stress induced (in MPa) is
10
100
1
0.1
The elastic limit is the point beyond which
Permanent deformation starts
Material breaks
Stress is zero
Strain is zero
The modulus of rigidity is related to
Volumetric strain
Shear strain
Longitudinal strain
Lateral strain
Which of these forces causes elongation in a material?
Shear force
Compressional force
Tensile force
Bending force
Shear stress acts:
Perpendicular to the surface
Parallel to the surface
Both perpendicular and parallel
None of these
The ratio of stress to strain in the elastic range is
Modulus of elasticity
Poisson's ratio
Modulus of rigidity
Bulk modulus
If the cross-sectional area of a rod is doubled for the same force, the stress will
Double
Halve
Remain same
Become zero
The change in length divided by original length is called
Stress
Strain
Load
Force
The phenomenon by which a material regains its original shape when stress is removed is called
Plasticity
Elasticity
Ductility
Toughness
Which mechanical property indicates the ability of a material to absorb energy before fracture?
Toughness
Ductility
Brittleness
Hardness
The unit of young’s modulus is
Pascal
Newton
Pascal per meter
Newton meter
Percentage elongation is a measure of:
Elasticity
Plasticity
Ductility
Hardness
Which of the following represents shear strain
Change in length/original length
Angle of distortion in radians
Lateral strain
Volumetric strain
The elastic constants are:
Young’s modulus and Bulk modulus only
Young’s modulus, Bulk modulus, Modulus of rigidity
Poisson’s ratio only
None of the above
Yield point marks the
Elastic limit
Beginning of plastic deformation
Ultimate strength
Fracture point
The factor of safety is defined as the ratio of:
Ultimate stress to actual working stress
Working stress to ultimate stress
Yield stress to fracture stress
Breaking load to elastic limit
Volumetric strain occurs due to:
Shear forces
Tensile forces
Change in volume
Change in length
The lateral strain of a rod is 0.0004 and longitudinal strain is 0.002. Poisson’s ratio is
0.2
0.4
0.5
0.6
Select correct expression between E,G & 1/m
E = 3G (1 - 2 * 1/m)
E=2G (1 - 2 * 1/m)
E = 2G[1 - 1/m]
E = 2G [1 + 1/m]
Select correct expression between E,G & K
E= (3K+G)/9KG
E= (9KG)/(3K+G)
E= (3K-G)/9KG
E= (9KG)/(3K-G)
What is the unit of poisson’s ratio
N/mm²
N/mm
N/cm²
No unit
The value of Young's Modulus of steel
1.1x10^{5}N/mm^{2}
2.1x10^{5}N/mm^{2}
3.1x10^{5}N/mm^{2}
4.1x 10^{5}N/mm^{2}
The property of a material which it undergoes and change in shape without rapture under compressive load is called:
Compressibility
Ductility
Malleability
Tenacity
The product of the force and the perpendicular distance between the line of action of the force is mathematically equal to:
Moment of force
Tensile force
Shear force
Compression
The resistance of a material against wear, indentation, scratching and abreaction etc. is called:
Elasticity
Rigidity
Hardness
Toughness
The strain produced due to the axial stress in the longitudinal direction is called:
Linear Strain
Lateral Strain
Shear Strain
Volumetric Strain
