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This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on Strength Of Materials Set 10
Q1 | A linear arch has
- normal thrust only
- shear force only
- bending moment only
- normal thrust and shear force
Q2 | A three hinged arch is carrying uniformly distributed load over the entire span. The arch isfree from shear force and bending moment if its shape is
- circular
- parabolic
- elliptical
- none of the above
Q3 | For a determinate pin-jointed plane frame, the relation between the number of joints j andmembers m is given by
- m = 2j - 3
- m = 3j-6
- m > 2j - 3
- m > 3j - 6
Q4 | The basic perfect frame is a
- triangle
- rectangle
- square
- hexagon
Q5 | Method of joints is applicable only when the number of unknown forces at the joint underconsideration is not more than
- one
- two
- three
- four
Q6 | A short column of external diameter of 250 mm and internal diameter of 150 mm carries an eccentric load of 1000 kN. The greatest eccentricity which the load can have without producing tension anywhere is
- 20 mm
- 31.25 mm
- 37.5 mm
- 42.5 mm
Q7 | Proof resilience is the maximum energy stored at
- limit of proportionality
- elastic limit
- plastic limit
- none of the above
Q8 | Strain energy stored in a member is given by
- 0.5 x stress x volume
- 0.5 x strain x volume
- 0.5 x stress x strain x volume
- 0.5 x stress x strain
Q9 | A rectangular block of size 200 mm x 100 mm x 50 mm is subjected to a shear stress of 100 N/mm2. If modulus of rigidity of material is 1 x 105 N/mm2, strain energy stored will be
- 10 N.m
- 25 N.m
- 50 N.m
- 100N.m
Q10 | A steel rod of cross sectional area equal to 1000 mm2 is 5 m long. If a pull of 100 kN is suddenly applied to it, then the maximum stress intensity will be
- 50 N/mm2
- 100 N/mm2
- 200 N/mm2
- 400 N/mm2
Q11 | If the depth of a beam of rectangular section is reduced to half, strain energy stored in thebeam becomes
- 1/4 time
- 1/8 time
- 4 times
- 8 times
Q12 | The specimen in a Charpy impact test is supported as a
- cantilever beam
- simply supported beam
- fixed beam
- continuous beam
Q13 | Impact test enables one to estimate the property of
- hardness
- toughness
- strength
- creep
Q14 | A fletched beam is used to
- Change the shape of the beam
- Effect the saving in material
- Equalize the strength in tension and compression
- Increase the cross-section of the beam
Q15 | The property of metal which allows it to deform continuously at slow rate without any further increase in stress is known as
- fatigue
- creep
- plasticity
- resilience
Q16 | The stress below which a material has a high probability of not failing under reversal ofstress is known as
- tolerance limit
- elastic limit
- proportional limit
- endurance limit
Q17 | A three hinged parabolic arch rib is acted upon by a single load at the left quarter point. If the central rise is increased and the shape of arch altered to segmental without changing the other details, the horizontal thrust will
- increase definitely
- decrease definitely
- be difficult to predict
- increase or decrease depending upon the radius of the segmental arch
Q18 | For ductile materials, the most appropriate failure theory is
- maximum shear stress theory
- maximum principal stress theory
- maximum principal strain theory
- shear strain energy theory
Q19 | At a point in a steel member, the major principal stress is 2000 kg/cm2 and the minor principal stress is compressive. If the uni-axial tensile yield stress is 2500 kg/cm2, then the magnitude of the minor principal stress at which yielding will commence, according to the maximum shearing stress theory, is
- 1000 kg/cm2
- 2000 kg/cm2
- 2500 kg/cm2
- 500 kg/cm2
Q20 | For the design of a cast iron member, the most appropriate theory of failure is
- Mohr's theory
- Rankine's theory
- Maximum strain theory
- Maximum shear energy theory
Q21 | In a riveted joint, when the rivets in the various rows are opposite to each other, the joint is said to be
- chain riveted
- zig-zag riveted
- diamond riveted
- none of these
Q22 | Two shafts 'A' and 'B' have the same material. The shaft 'A' is solid of diameter 100 mm. The shaft 'B' is hollow with outer diameter 100 mm and inner diameter 50 mm. The torque transmitted by shaft 'B' is
- 1 ? 6
- 1 ? 8
- 1 ? 4
- 15 ? 16
Q23 | The ratio of change in volume to the original volume is called
- linear strain
- lateral strain
- volumetric strain
- Poisson's ratio
Q24 | The ratio of bulk modulus to Young's modulus for a Poisson's ratio of 0.25 will be
- 1 ?3
- 2 ? 3
- 1
- 3 ? 2
Q25 | If the section modulus of a beam is increased, the bending stress in the beam will
- not change
- increase
- decrease