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This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on Strength Of Materials Set 30
Q1 | The materials which exhibit the same elastic properties in all directions are called
- Visco-elastic
- Isentropic
- Isotropic
- Inelastic
- Homogeneous
Q2 | The size of hole drilled in plates for rivetting is
- Equal to the diameter of rivet shank
- Slightly smaller than the diameter of river shank
- 1.5 to 2 mm smaller than the diameter of rivet for revets of 25 mm and above size
- 1.5 to 2 mm large than the diameter of the rivet for rivets of 25 mm and above size
- None of the above
Q3 | The potential energy stored up in a deformed body is known as
- Strain energy
- Potential energy
- Resilience
- Deformation energy
- None of the above
Q4 | Laminated springs are generally
- loaded at ends and supported at centre
- loaded at centre and supported at ends
- loaded as well as supported at centre
- loaded as well as supported at ends
- None of the above
Q5 | A body having similar properties throughout its volume is said to be
- Uniform
- Isotropic
- Contimuous
- Homogeneous
- Isentropic
Q6 | The units of true strain are
- cm/cm
- kg/cm
- kg-cm/cm
- Dirnensionless
- None of the above
Q7 | A material capable of absorbing large amounts of energy is known as
- Ductile
- Shock proof
- Resilient
- Hard
- Tough
Q8 | For beam of length L fixed at two ends A and B and loaded W at the centre C the maximum bending moment will
- Occur at A
- Occur at B
- Occur at C
- (A) and (B) above
- (A) (B) and (C) above
Q9 | In M.L.T. system the dimensions of Young's modulus of elasticity are
- MLT
- ML-1 T-2
- MLT-2
- ML-2 T-2
- MLT-1
Q10 | If, for a given material, the modulus of elasticity is equal to twice its modulus of rigidity (G), then the bulk modulus is
- 2 G
- 0.33 G
- 9 G
- 0.67 G
- None of the above
Q11 | For a thin longitudinal cylinder the ratio hoop stress/longitudinal stress is
- 4
- 2
- 1
Q12 | The modulus of resilience is
- The energy stored in a body
- Strain energy stored in a specimen when strained within elastic limit
- The maximum energy stored at elastic limit per unit volume.
- Strain energy stored in a specimen when strained beyond elastic limit
- The maximum energy stored at elastic limit
Q13 | The strain energy stored in a specimen when strained within elastic limit is known as
- Proof strain energy
- Strain energy
- Elastic limit strain energy
- Resilience
- None of the above
Q14 | Euler's formula is not applicable to columns
- with both ends free
- with both ends fixed
- of composite material
- having slenderness ratio less than 80
- None of the above
Q15 | A non-wielding support means
- Support that restores elongation after the load is removed
- Slope of the beam at the support is zero
- Support is frictionless
- Support that does not elongate
- Support holds the load firmly and safely
Q16 | The moment of inertia of an area will be least with respect to
- central axis
- horizontal
- vertical axis
- moment of area does not depend on axes
- None of the above
Q17 | If this shaft is to be replaced by a hollow shaft of texternal diameter 22 mm for the same maximum shear stress and same torque, the internal diameter will be
- 15.5 mm
- 11 mm
- 21 mm
- 31 mm
- 51 mm
Q18 | A column is known as short column if
- The length is more than 30 times the diameter
- The slenderness ratio is more than 32
- Slenderness ratio is more than 120
- The length is less than 8 times the diameter
- The length is 15 times the diameter
Q19 | Two beams of equal cross-sectional area are subjected to equal bending moment. If one beam has square cross-section and the other has circular section, then
- The suitability of section will depend on the nature of loading
- In shear, square section beam will be stronger
- Both beams will be equally strong
- Square section beam will be economical
- Circular section beam will be economical
Q20 | The slenderness ratio of vertical comumn of square cross-section of 2.5 cm sides and 600 cm length is
- 500
- 200
- 100
- 900
- 1000
Q21 | The torsional resisting moment of the following section is being considered with identical characteristic parameter. Which section will have maximum torsional resisting moment
- Hollow circular
- Circular
- Triangular
- Square
- Hexagonal
Q22 | The force required to punch a 25 mm hole in a mild steel pipe 10 mm thich, when ultimate shear stress of the plate is 500 N/mm2 will be nearly
- 78 kN
- 98 kN
- 393 kN
- 158 kN
- None of the above
Q23 | During the tensile test on a glass rod, the nature of stress section curve is
- Vertical line
- Sudden break
- Same as that for mild steel
- Horizontal line
- Straight line
Q24 | The plastic moment of a beam can be 50 percent more than the maximum elastic moment in case the cross-section of the beam is
- Circular
- Rectangular
- Elliptical
- I-section
- Semi-circular
Q25 | If unit loads rest upon a beam at two points A and B, the deflection at A due to unit load at B, equals the deflection at B due to the unit load at A. This is known as
- Rankine's theorem
- Mohr's hypothesis
- Castigliano's theorem
- Maxwell's theorem
- None of the above