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This set of Structural Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Structural Mechanics Set 1
Q1 | What is elasticity?
- ability to re-gain It's original size and shape
- ability to produce permanent deformation
- both
- none of above
Q2 | What is modular ratio?
- ratio of deflection in each material
- ratio of modulus of elasticity of bot h material
- ratio of load acting in each section
- all of above
Q3 | 3.5 m long bar is under tensile load and due to that increase in length of bar is 1.75 mm then strain =
- 0.0035
- 0.0005
- 0.002
- 0.0175
Q4 | The increase in the length of a bar of length 1 m, area 300 mm2, modulus of elasticity 2×10^5 N/mm2 due to a tensile load of 120 KN is .
- 1 mm
- 2mm
- 3mm
- 4mm
Q5 | Shear stress causes .
- Deformation
- Elongation
- contraction
- None of above
Q6 | which of the following has same unit?
- modulus of elasticity, pressure, stress
- elasticity, strain, stress
- pressure, strain, stress
- modulus of elasticity, strain, modulus of rigidity
Q7 | unit of stress is .
- Pascal
- Newton
- N/m2
- a and c both
Q8 | In composite section deformation is same in both materials.
- TRUE
- FALSE
- none
- all
Q9 | which of the following is type of stress?
- tensile stress
- compressive stress
- shear stress
- all of the above
Q10 | Strain is defined as the ratio of
- change in volume to original volume
- change in length to original length
- change in cross-sectional area to original cross-sectional area
- any one of the above
Q11 | Hooke's law holds good up to
- yield point
- limit of proportionality
- breaking point
- elastic limit
Q12 | Young's modulus is defined as the ratio of
- volumetric stress and volumetric strain
- lateral stress and lateral strain
- longitudinal stress and longitudinal strain
- shear stress to shear strain
Q13 | The unit of Young's modulus is
- mm/mm
- kg/cm
- kg
- kg/cm2
Q14 | Deformation per unit length in the direction of force is known as
- Strain
- lateral strain
- linear strain
- linear stress
Q15 | It equal and opposite forces applied to a body tend to elongate it, the stressso produced is called
- internal resistance
- tensile stress
- transverse stress
- compressive stress
Q16 | The materials having same elastic properties in all directions are called
- ideal materials
- uniform materials
- isotropic materials
- elastic materials.
Q17 | Modulus of rigidity is defined as the ratio of
- longitudinal stress and longitudinal strain
- volumetric stress and volumetric strain
- lateral stress and lateral strain
- shear stress and shear strain
Q18 | If the radius of wire stretched by a load is doubled, then its Young's modulus will be
- Doubled
- Halved
- become four times
- remain unaffected
Q19 | The intensity of stress which causes unit strain is called
- unit stress
- bulk modulus
- modulus of rigidity
- modulus of elasticity
Q20 | Which of the following has no unit
- kinematic viscosity
- surface tension
- bulk modulus
- strain
Q21 | Euler's formula states that the buckling load P for a column of length l, both ends hinged and whose least moment of inertia and modulus of elasticity of the material of the column are I and E respectively, is given by the relation
- P=?2EIL2
- P=?L2EI
- P=?EIL2
- P=?2EIL3
Q22 | Rankine-Golden formula accounts for direct as well as buckling stress and is applicable to
- very long columns
- long columns
- short columns
- intermediate columns
Q23 | Maximum deflection of a cantilever due to pure bending moment M at its freeend, is
- ML2/3EI
- ML2/4EI
- ML2/6EI
- ML2/2EI
Q24 | The ratio of the effective length of a column and minimum radius of gyration ofits cross-sectional area, is known
- buckling factor
- slenderness ratio
- crippling factor
- none of these
Q25 | A long vertical member, subjected to an axial compressive load, is called
- a column
- a strut
- a tie
- a stanchion