Strength Of Materials Set 27

Mechanical Engineering

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This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on Strength Of Materials Set 27

Q1 | A beam simply supported at ends is subjected to load. The point of contraflexure is located where
  • Bending moment is zero
  • Shear force is maximum
  • Shear force is zero
  • At the middle of the longer side
  • Axial thrust is zero
Answer: Bending moment is zero
Q2 | Which section is normally preferred for an eccentrically loaded strut?
  • Solid
  • Hollow
  • Composite
  • Reinforced
  • Any of the above
Answer: Composite
Q3 | The point of contraflexural can exist in a
  • Simply supported beams only
  • Cantilever
  • Beam with overhangs but without any load on the overhanging sections
  • Beam fixed at both ends
  • All of the above
Answer: Beam fixed at both ends
Q4 | Two shafts are made of mild steel one having circular cross-section and the other shaft is hollow circular with inner diameter half of the outer diameter. The ratio of the torque that can be transmitted in two cases will be
  • 17/16
  • 15/16
  • 7?8
  • 2
  • 1
Answer: 15/16
Q5 | If a rectangular shaft is subjected to torsion, the maximum sher stress will occur
  • Along the diagonal
  • At the comers
  • At the middle of the small side
  • At the centre
  • At the middle of the longer side
Answer: At the middle of the longer side
Q6 | A continuous beam is
  • One which is constrained at both ends
  • One resting upon several supports
  • One which is part of a system consisting of a number of beams
  • One which is very long as compared to width of beam
  • None of the above
Answer: One resting upon several supports
Q7 | In a beam where shear force is maximum the bending moment will be
  • Maximum
  • Zero
  • Minimum
  • There is no such relation between the two
  • None of the above
Answer: Maximum
Q8 | Principal strains occur on three planes which are
  • mutually perpendicular to each other
  • arbitrary in nature
  • inclined to one another at 45?
  • None of the above
  • None of the above
Answer: mutually perpendicular to each other
Q9 | The effective length of a column effectively held in position and restrained in direction at one end but not held in position or restrained in direction at the other end would be
  • 0.67 L
  • 2 L
  • 0.85 L
  • L
  • 1.5 L
Answer: 0.85 L
Q10 | A shaft running at 300 rpm is required to transmit 300 horse power. The working stress in shear is 420 kg/cm2. The diameter of the shaft whould be in the range
  • 1 cm to 2 cm
  • 3 cm to 4 cm
  • 2 cm to 3 cm
  • 4 cm to 5 cm
  • 7 cm to 9.7 cm
Answer: 7 cm to 9.7 cm
Q11 | Deflection the point of application of an external force acting on a beam is equal to the partial derivation of the work of deformation with respect to this force
  • Rankine's theorem
  • Mohr's hypothesis
  • Castigliano's theorem
  • Maxwell's theorem
  • None of the above
Answer: Castigliano's theorem
Q12 | A uniform beam of effective length L, fixed at one end and loaded uniformly will have maximum deflection at
  • 5/8 L from free end
  • 7/8 L from fixed end
  • Between CD
  • At free end
  • 3/8 L from free end
Answer: 3/8 L from free end
Q13 | Under uniaxial strain, the ratio of maximum shearing strain to uniaxial strain is
  • 2
  • 1.5
  • 1
  • 0.5
  • None of the above
Answer: 0.5
Q14 | Three pieces of wood having 3.75 cm x 3.75 cm square cross-sections are glued together and to the foundation. If the horizontal force P = 600 kg is applie3d to the central piece, the average shearing stress in each of the glued joints would be
  • 20 kg/cm2
  • 40 kg/cm2
  • 80 kg/cm2
  • 430 kg/cm2
  • 860 kg/cm2
Answer: 20 kg/cm2
Q15 | During suddenly applied impact loading the stress developed to gradually applied load is
  • 4 times
  • ?2 time
  • 1.5 times
  • 1
  • 2 times
Answer: 2 times
Q16 | Rivets are made of
  • Ductile material
  • Hard material
  • Brittle material
  • Malleable material
  • Tough material
Answer: Ductile material
Q17 | A beam of uniform strength will have at every cross-section
  • same deflection
  • same stiffuess
  • same bending moment
  • same bending stress
  • None of the above
Answer: same bending stress
Q18 | A solid steel shaft of 100 mm diameter transmits 100 HP at (450/?) r.p.m. The torque in kg-m on the shaft would be
  • 500
  • 750
  • 1000
  • 5000
  • 250
Answer: 500
Q19 | Principal plane has
  • No shear stress
  • Maximum compressive stress
  • No compressive stress
  • Maximum shear stress
  • Maximum tensile stress
Answer: Maximum shear stress
Q20 | A vessel is said to be thin walled, when
  • The vessel is made of thin sheets
  • The vessel wall thickness is less than 1 mm
  • The vessel wall thickness is equal to or less than 1/20 of the internal diameter of the vessel
  • The vessel wall thickness is equal to or less than 1/10 of the internal diameter of the above
  • None of the above
Answer: The vessel wall thickness is equal to or less than 1/20 of the internal diameter of the vessel
Q21 | Strain is
  • The change in metals
  • The change in shape and direction in metal
  • The result of load application on a body
  • The change of form produced in a piece by the action of load
  • None of the above
Answer: The change of form produced in a piece by the action of load
Q22 | The shape of steel chimneys commonly used is
  • Square
  • Circular
  • Octagonal
  • Elliptical
  • None of the above
Answer: Circular
Q23 | An axial hoad is applied on a circular section of diameter D. If the same load is applied on hollow circular section with inner diameter D/2, the ratio of stress in two cases would be
  • 4
  • 3?4
  • 4?3
  • 1
Answer: 3?4
Q24 | The loss of strength in compression due to overloading is known as
  • Relaxation
  • Creep
  • Hysteresis
  • Bauschinger effect
  • Resilience
Answer: Bauschinger effect
Q25 | When a rectangular beam is loaded longitudinally, shear stress develops on
  • Vertical planes only
  • Top fibre
  • Middle fibre
  • Every fibre
  • Bottom fibre
Answer: Every fibre
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