Strength Of Materials Set 33

Mechanical Engineering

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This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on Strength Of Materials Set 33

Q1 | In case of non-dilatent materials, the maximum value of Poisson's ratio is
  • 0.5
  • 0.25
  • 0.33
  • 0.47
  • 0.6
Answer: 0.5
Q2 | A self-supporting steel chimney transmits the lateral forces to the foundation by
  • fixed beam action
  • proposed beam action
  • cantilever action
  • simply supported beam action
  • None of the above
Answer: cantilever action
Q3 | The phenomenon under which the strain of a material varies under constant stress is known as
  • Buchinger's effect
  • Hysteresis
  • Visco-elasticity
  • Creep
  • Strain hardening
Answer: Creep
Q4 | The strength of a riveted plate in tearing should be based on
  • the rivet diameter
  • the rivet hole diameter
  • the average of (A) and (B) above
  • the average of (A) and (B) above plus 2 mm.
  • None of the above
Answer: the rivet hole diameter
Q5 | The Erichsen cupping number of a sheet metal indicates its
  • Surface roughness
  • Drawing quality
  • Hardness
  • Ductility
  • Toughness
Answer: Drawing quality
Q6 | The limiting value of span to depth ratio will be least in case of
  • simply supported slabs spanning in one direction
  • simply supported slabs spanning in two directions
  • continuous salb spanning in one direction
  • cantilever slabs
  • None of the above
Answer: cantilever slabs
Q7 | A load of 10,000 kg is applied to copper cylinder 20 cm long and 5 cm in diameter causes the length to increase by 4 mm and diameter to decrease by 0.4 mm. The Poisson's ratio for copper would be
  • 0.33
  • 0.4
  • 0.25
  • 0.23
  • 0.6
Answer: 0.4
Q8 | The allowable stresses for the design of steel chimney depend upon the ratio of
  • area of cylindrical portion of the area flared portion
  • volume of cylindrical portion to the volume of flared portion
  • weight of cylindrical portion to the weight of the flared portion
  • effective height to the radius of gyration
  • None of the above
Answer: effective height to the radius of gyration
Q9 | When a beam having square cross-section is loaded longitudinally, the shear stress develops
  • On middle fibre in vertical plane
  • On top fibre in horizontal plane
  • Equally on each fibre along horizontal plane
  • Along the diagonal
  • One middle fibres in horizontal plane
Answer: Equally on each fibre along horizontal plane
Q10 | A solid circular shaft and a thin walled circular tube made of the same material and having the same weight are stressed in torsion to the same maximum shear stress. The ratio of the amounts of strain energy stored in the two shafts would be
  • 1?4
  • 1
  • 2
  • ?
  • 1?2
Answer: ?
Q11 | A bolt of nominal diameter 33 mm having a safe tensile stress of 100 N/mm2 can safely carry a load of
  • 260 kN
  • 100 kN
  • 150 kN
  • 160 kN
  • 60 kN
Answer: 60 kN
Q12 | The number of elastic constants for a completely anisotropic elastic material which follows Hooke's law, is
  • 25
  • 21
  • 4
  • 2
  • 3
Answer: 21
Q13 | A masonry dam is liable to fail
  • By sliding on the soil on which it rests
  • Over overturning
  • Due to tensile stress developed
  • Due to excessive compressive stresses
  • Any of the above
Answer: Any of the above
Q14 | The modulus of resilience in tension is nearly
  • 65 kJ/m3
  • 130 kJ/m3
  • 210 kJ/m3
  • 260 kJ/m3
  • None of the above
Answer: 260 kJ/m3
Q15 | The shape of the Kem area for a rectangular section is
  • Rhombus
  • Rectangle
  • Square
  • Parallelogram
  • Circle
Answer: Parallelogram
Q16 | For any shaft the number of critical speed is
  • infinite
  • depends on size and load
  • 2
  • 1
  • depends on external load and moment of inertia
Answer: infinite
Q17 | The ratio of Bulk modulus to shear modulus for Poisson's ratio of 0.25 will be
  • 5?3
  • 3?2
  • 2?3
  • 5?6
  • 1
Answer: 5?3
Q18 | In case of a hinged support, the reaction
  • Acts perpendicular to the beam
  • In a direction which depends on the loads
  • Acts in a direction opposite to the resultant shear force at the support
  • Acts perpendicular to the surface of hinge
  • Acts along the axis of beam
Answer: Acts in a direction opposite to the resultant shear force at the support
Q19 | The limiting values of Poisson's ratio are
  • 0 and 1
  • ?1 and +1
  • ?0.5 and +0.5
  • ?1 and +0.5
  • None of the above
Answer: ?1 and +0.5
Q20 | The effect of arching a beam is to
  • increase the shear force
  • reduce the shear force
  • reduce the bending moment throughout
  • increase the bending moment throughout
  • None of the above
Answer: reduce the bending moment throughout
Q21 | A beam supported at more than two places is known as
  • Flitched beam
  • Uniform beam
  • Continuous beam
  • Economical beam
  • None of the above
Answer: Continuous beam
Q22 | A spring steel ribbon 3.2 mm wide, 0.5 mm thick is wound on a 500 mm diameter cylinder. If E = 2 x 105 N/mm2, the maximum stress in the steel will be
  • 100 N/mm2
  • 200 N/mm2
  • 400 N/mm2
  • 800 N/mm2
  • None of the above
Answer: 200 N/mm2
Q23 | In a universal testing machine during the testing of a specimen of original cross-sectional area 1 cm2 the maximum load appliied was 7.5 tonnes and neck area 0.6 sq. cm. The ultimate tensile strength of the specimen is
  • 12.5 tonnes/cm2
  • 10.0 tonnes/cm2
  • 7.5 tonnes/cm2
  • 4.5 tonnes/cm2
  • None of the above
Answer: 7.5 tonnes/cm2
Q24 | It is desired to punch a hole of 20 mm diameter in a plate 20 mm think. If the shear stress of mild steel is 30 kg/mm2, the force necessary for punching would be approximately in the range
  • 20 - 25 tonnes
  • 15 - 20 tonnes
  • 10 - 15 tonnes
  • 35 - 40 tonnes
  • 25 - 35 tonnes
Answer: 35 - 40 tonnes
Q25 | A spherical pressure vessel is made of thin magnesium plate 0.25 cm thick. The main diameter of the sphere is 600 cm and allowable stress in tension is 900 kg/cm2. The safe internal gas pressure for the vessel would be
  • 5.5 kg/cm2
  • 3.0 kg/cm2
  • 0.5 kg/cm2
  • 4.77 kg/cm2
  • 1.5 kg/cm2
Answer: 1.5 kg/cm2
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