Q.1

The effect of arching a beam, is

  • to reduce the bending moment throughout
  • to increase the bending moment throughout
  • nothing on the bending throughout
  • ail the above.
Q.2

If the depth of a simply supported beam carrying an isolated load at its centre, is doubled, the deflection of the beam at the centre will be changed by a factor of

  • 2
  • 1/2
  • 8
  • 1/8
  • 4
Q.3

The moment diagram for a cantilever which is subjected to a uniformly distributed load will be a

  • triangle
  • rectangle
  • parabola
  • cubic parabola.
Q.4

The neutral axis of a beam cross-section must

  • pass through the centroid of the section
  • be equidistant from the top of bottom films
  • be an axis of symmetry of the section
  • none of these.
Q.5

Pick up the correct statement from the following :

  • All the above.
  • A ductile material has large plastic zone
  • A brittle material has no plastic zone
  • A rigid material has no plastic zone
Q.6

If the stress in each cross-section of a pillar is equal to its working stress, it is called

  • body of equal
  • body of equal section
  • body of equal strength
  • none of these.
Q.7

The property of a material by which it can be drawn to a smaller section, due to tension, is called

  • plasticity
  • ductility
  • elasticity
  • malleability.
Q.8

The intensity of direct longitudinal stress in the cross-section at any point distant r from the neutral axis, is proportional to

  • r
    127-6.67-1.png
    127-6.67-2.png
  • r2
    127-6.67-2.png
  • r3.
Q.9

The phenomenon of slow growth of strain under a steady tensile stress, is called

  • yielding
  • creeping
  • breaking
  • none of these.
Q.10

The value of Poisson's ratio always remains

  • greater than one
  • less than one
  • equal to one
  • none of these.
Q.11

The equivalent length of a column fixed at one end and free at the other end, is

  • 0.5 l
  • 0.7 l
  • l
  • 2 l
  • 1.5 l.
Q.12

The areas of cross-section of a square beam and a circular beam subjected to equal bending moments, are same.

  • circular beam is more economical
  • square beam is more economical
  • both the beams are equally strong
  • both the beams are equally economical
  • none of these.
Q.13

The bending moment is maximum on a section where shearing force

  • is maximum
  • is minimum
  • is equal
  • changes sign.
Q.14

The stress necessary to initiate yielding, is considerably

  • more than that necessary to continue it
  • less than that necessary to continue it
  • more than that necessary to stop it
  • less than that necessary to stop it.
Q.15

If the beam is supported so that there are only three unknown reactive elements at the supports. These can be determined by using the following fundamental equation of statics

  • ∑H = 0
  • ∑V = 0
  • ∑H = 0; ∑H = 0
  • ∑H = 0; ∑V = 0; ∑M = 0
  • ∑M = 0; ∑H = 0
Q.16

The value of Poisson's ratio always remains

  • greater than one
  • less than one
  • equal to one
  • none of these.
Q.17

A beam is said to be of uniform strength, if

  • B.M. is same throughout the beam
  • shear stress is same throughout the beam
  • deflection is same throughout the beam
  • bending stress is same at every section along its longitudinal axis.
Q.18

The number of points of contraflexure in a simple supported beam carrying uniformly distributed load, is

  • 1
  • 2
  • 3
  • 0
Q.19

If p is the internal pressure in a thin cylinder of diameter d and thickness t, the developed hoop stress, is

Q.20

The intensity of direct longitudinal stress in the cross-section at any point distant r from the neutral axis, is proportional to

  • r
    127-6.67-1.png
    127-6.67-2.png
  • r2
    127-6.67-2.png
  • r3.
Q.21

A beam is said to be of uniform strength, if

  • B.M. is same throughout the beam
  • shear stress is same throughout the beam
  • deflection is same throughout the beam
  • bending stress is same at every section along its longitudinal axis.
Q.22

The distance between the centres of adjacent rivets in the same row, is called

  • pitch
  • lap
  • gauge
  • staggered pitch.
Q.23

Hooke's law states that stress and strain are

  • directly proportional
  • inversely proportional
  • curvilinearly related
  • none of these.
Q.24

For a beam having fixed ends, the unknown element of the reactions, is

  • horizontal components at either end
  • vertical components at either end
  • horizontal component at one end and vertical component at the other
  • horizontal and vertical components at both the ends.
Q.25

A cast iron T section beam is subjected to pure bending. For maximum compressive stress to be three times the maximum tensile stress, centre of gravity of the section from flange side is

  • h/4
  • h/3
  • h/2
  • 2/3 h.
Q.26

For the same height, the bottom width for no tension,

  • for triangular section is more than rectangular section
  • for rectangular section is more than triangular section
  • for triangular section is same as that of a rectangular section
  • none of these.
Q.27

Pick up the correct statement from the following :

  • The rate of change of bending moment is equal to rate of shear force
  • The rate of change of shear force is equal to rate of loading
  • neither (a) nor (b)
  • both (a) and (b).
Q.28

In a solid arch, shear force acts

  • vertically upwards
  • along the axis of the arch
  • perpendicular to the axis of arch
  • tangentially to the arch
  • none of these.
Q.29

Ties are load carrying members of a frame, which are subjected to

  • transverse loads
  • axial tension loads
  • axial compressive loads
  • torsional loads.
Q.30

For a beam, if fundamental equations of statics are not sufficient to determine all the reactive forces at the supports, the structure is said to be

  • determinate
  • statically determinate
  • statically indeterminate
  • none of these.
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