Bihar SBTE Diploma Mechanical 3rd SEM Dec 2019 Paper on MOS
| Sr. No. | Questions with options |
| 1 | For which material the Poisson’s ratio is more than unity?
(a) Steel (b) Copper (c) Aluminium (d) None of these |
| 2 | The ratio of Bulk modulus to Young’s modulus for a Poisson’s ratio of 0.25 will be approx
(a) 0.33 (b) 0.66 (c) 1.5 (d) 1.0 |
| 3 | A steel bar is fixed at both ends. If the bar is cooled, it will develop
(a) Compressive stress (b) Tensile stress (c) Both (a) & (b) (d) None of these |
| 4 | The relation between Young’s modulus (E) modulus of rigidity (G) and Poisson’s ratio (1/m) is given by
(a) G = mE/2(m+1) (b) G= 2mE/(m+1) (c) G= (m+1)/2mE (d) G= 2(m+1)/mE |
| 5 | Poisson’s ratio is used in
(a) One –dimensional body (b) Two –dimensional body (c) Three-dimensional body (d) Both two and three dimensional body |
| 6 | The stress induced in a boy, When suddenly applied load is ________the stress induced when the same load is applied gradually
(a) Equal to (b) One- half (c) Twice (d) Four time |
| 7 | The rate of change of bending moment is equal to
(a) Loading at that section (b) Slope at that section (c) Shear force at that section (d) Deflection at that section |
| 8 | Where shear force changes sign, the bending moment will be
(a) Zero (b) Maximum (c) Minimum (d) Infinity |
| 9 | The variation of bending moment due to uniformly distributed load (u.d.l) is
(a) Uniform in nature (b) Linear in nature (c) Parabolic in nature (d) Hyperbolic in nature |
| 10 | Principal planes are those planes on which
(a) Normal stress is either maximum or minimum (b) Tangential stress is zero (c) Both (a)& (b) (d) None of these |
| 11 | The maximum shear stress is equal to _______of the Mohr’s circle
(a) Radius (b) Diameter (c) Circumference (d) Area |
| 12 | The shear stress at the outermost fibres of a circular shaft under torsion is
(a) Maximum (b) Minimum (c) Zero (d) None of these |
| 13 | If depth of a beam is doubled, then changes in its section modulus
(a) Will remain same (b) Will decrease (c) Will be doubled (d) Will increase by four times |
| 14 | Moment of inertia of an area will least about
(a) Horizontal axis (b) Vertical axis (c) Central axis (d) None of these |
| 15 | At the point of contraflexure
(a) Bending moment changes its sign (b) Shear force changes its sign (c) Shear force is minimum (d) Shear force is maximum |
| 16 | The design of thin cylinder shell is based on
(a) Hoop stress (b) Longitudinal stress (c) Volumetric stress (d) All of the above |
| Published On – 2nd June 2022 | |
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