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This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on Strength Of Materials Set 32
Q1 | A cantilever beam rectangular in cross-section is subbjected to a load W at its free end. If the depth of the beam is doubled and the load is halved, the deflection of the free end as compared to original deflection will be
- Double
- One-sixteenth
- Eight times
- One eight
- Half
Q2 | The neutral axis of a simply supported beam is
- Where fibres are subjected to maximum compression
- Where fibres do not undergo strain
- Where fibres are subjected to maximum bending stress
- When fibres are subjected to minimum bending stress
- Where fibres undergo maximum strain
Q3 | The point of contraflexure occurs in
- All types of beams
- Continuous beam only
- Simply supported beams only
- Cantilever beams only
- Overhanging beams only
Q4 | A short, hollow cast iron cylinder with a wall thickness of 1 cm is to carry a compressive load of 10 tonnes. If the working stress in compression is 800 kg/cm2, the outside diameter of the cylinder should not be less than
- 0.5 cm
- 1.0 cm
- 4.5 cm
- 2.5 cm
- 5 cm
Q5 | In case of thin cylindrical shell with hemispherical ends
- The thickness of cylindrical is more than that of spherical ends
- The thickness of cylinderical shell is less than that of spherical ends
- The thickness of cylindrical is same as that of spherical ends
- The thickness of cylindrical shell is double of the thickness of spherical shell
- None of the above
Q6 | The amount of resilience is equal to
- The work required to deform the body zero stress to stress within elastic limit
- Elastic energy stored in unit area of material
- Equal to the area of the stress deformation diagram
- None of the above
- None of the above
Q7 | A strip of steel 75 mm wide 40 mm thick is bent round a circular drum of 4.96 m outside diameter. If E = 2 x 105 N/mm2, the maximum stress due to bending will be
- 1600 N/mm2
- 1200 N/mm2
- 800 N/mm2
- 400 N/mm2
- None of the above
Q8 | A pressure vessel is said to be thin walled when the ratio of internal diameter of the vessel and wall thickness is
- More than 20
- 5
- There is no such relationship
- 15
- 10
Q9 | For a beam of uniform strength if its depth is maintained constant, then its width will vary in proportion to
- Bending Moment, BM
- (BM)2
- (BM)
- (BM)3
- None of the above
Q10 | Two beams carrying identical loads simply supported are having same width but beam A has double the depth as compared to that of beam B. The ratio of elastic strength of neam A compared to that of B will be
- 2
- ?
- 4
- 8
Q11 | Force required to punch a 15 mm hole in a mild steel pipe 5 mm thick, when ultimate shear stress of the plate is 500 N/mm2, will be nearly
- 78 kN
- 98 kN
- 118 kN
- 158 kN
- None of the above
Q12 | A cantilever beam of length 5 m carries a uniformly distributed load of 100 Newtons/m throughout its length. The maximum shearing force in the beam will be
- 100 N
- 250 N
- 500 N
- 1250 N
- None of the above
Q13 | The limit within which Hooke's law holds good is known as
- Elastic limit
- Plastic limit
- Yield point
- Eulers limit
- None of the above
Q14 | The theory of failure considered appropriate for ductile materials is
- Rankines theory
- Beltrami's theory
- St. Venant theory
- Von Mises theory.
- None of the above
Q15 | A bronze specimen has modulus of elasticity 1.2 x 105 N/mm2 and modulus of rigidity 4.7 x 104 N/mm2. The Poisson's ratio of the material will be
- 0.196
- 0.276
- 0.45
- 0.471
- None of the above
Q16 | The intensity of wind pressure is taken as
- directly proportinal to wind velocity
- universely proportional to wind velocity
- directly proportional to square of wind velocity
- inversely proportional to square of wind velocity
- None of the above
Q17 | Which of the following statement is incorrect?
- At a hinge in a beam there is no bending moment but there is shear force
- In case of inclined loads horizontal components cause thrust in the beam
- Bending moment is maximum at a point where shear force is zero or where it changes deflection from positive to negative or vice versa
- The point where shear force is zero is known as the point of contraflexure
- None of the above
Q18 | A thin cylinder contains fluid at a pressure of 30 kg/cm2, the inside diameter of the shell is 60 cm and the tensile stress in the material is to be limited to 900 kg/cm2. The shell must have minimum wall thickness of
- 1000 mm
- 1 mm
- 2.7 mm
- 10 mm
- 9 mm
Q19 | A tower subjected to load W has self-weight 2W. It is to be designed for constant compressive stress at all sections. The cross-section of the tower should have
- Tapering section
- Circular section
- Parabolic section
- Hyperbolic section
- None of the above
Q20 | The Young's modulus of elasticity of a material is twice its modulus of rigidity. The Poisson's ratio for the material will be
- Zero
- 0.5
- 1
- None of the above
- None of the above
Q21 | Web crippling occurs due to
- column action of the web
- failure of web under concentrated load
- excessive bending moment
- secondary stresses
- None of the above
Q22 | The light gauge steel structural members are usually
- hot rolled
- cold rolled
- casted
- riveted
- None of the above
Q23 | Static loading of a specimen
- Is done in steps
- Is done by continuously increasing the work load
- Is done by applying load in a short period during specified intervals
- Is done by applying the load slowly enough so that all parts of the specimen are in equilibrium at any instant
- None of the above
Q24 | A beam fixed at both ends with a central load W in the middle will have zero bending moment as
- One place
- No where
- Three places
- Four places
- Two places
Q25 | A body is subjected to two normal stresses of 200 kN/m2 (tensile) and 100 kN/m2 (compressive) acting mutually perpendicular to each other. The maximum sher stress is equal to
- 50 kN/m2
- 100 kN/m2
- 150 kN/m2
- 300 kN/m2
- None of the above