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This mock test of Test: Shear for Civil Engineering (CE) helps you for every Civil Engineering (CE) entrance exam.
This contains 10 Multiple Choice Questions for Civil Engineering (CE) Test: Shear (mcq) to study with solutions a complete question bank.
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QUESTION: 1

For a reinforced concrete section, the shape of shear stress diagram is

Solution:

QUESTION: 2

The ratio of permissible shear stress in limit state method of design and working stress method of design is

Solution:

Permissible shear stress.

In limit state method of design,

τ_{c} = 0.25√f_{ck}

in working state method of design,

τ_{c} = 0.16√f_{c}k

∴ Ratio = 25/16

QUESTION: 3

The contribution of bent up bars towards shear resistance shall not be more than

Solution:

Total shear strength = shear resistance of effective concrete area as a function of longitudinal bars + shear resistance of vertical shear stirrups + shear resistance of-inclined shear stirrups.

Tests have shown that inclined bars alone do not provide a satisfactory solution and their contribution is limited to 50% of net shear strength after deducting the contribution of concrete. The remaining shear resistance is provided by vertical stirrups.

QUESTION: 4

If the nominal shear stress (ζ_{v}) at a section does not exceed the permissible shear stress (τ_{c})

Solution:

If the calculated shear stress ( ζ_{v }) is

(i) less than allowable shear stress (ζ_{c}) but more than 0.5ζ_{c}, the minimum shear reinforcement in the form of stirrups shall be provided such that,

(ii) more than ζ_{c}, shear reinforcement shall be provided in the form of vertical stirrups or bent up bars with stirrups or inclined stirrups to resist

V_{us} = Vu - τ_{c}bd. Here τ_{v} < τ_{c},max

(iii) If τ_{v} > τ_{c},max redesign the section.

QUESTION: 5

A beam of rectangular cross-section (b x d) is subjected to a torque T. What is the maximum torsional stress induced in the beam (b < d and α is a constant)?

Solution:

Torsion constant of a rectangular section of width b and depth d (b < d) may be expressed as,

J = b^{3}d

For T, L and / sections torsion constant,

where b_{i} and d_{i} are the dimensions of each of the component rectangles into which the section may be divided.

Torsional shear stress for rectangular section

τ = T/ab^{2}d

For T, L and / sections torsional shear stress may be calculated for each component rectangle by considering them subjected to torsional moment,

QUESTION: 6

The minimum cover in a slab should neither be less than the diameter of bar nor less than

Solution:

QUESTION: 7

The average permissible stress in bond for plain bars in tension is

Solution:

QUESTION: 8

When shear stress exceeds the permissible limit in a slab, then it is reduced by

Solution:

Shear stress in slabs is controlled by increasing the depth of slab and not shear reinforcement while in beams shear stirrups are provided to control shear.

QUESTION: 9

Flexural shear failure in a reinforced concrete beam

1. occurs under large bending moment and less shearforce

2. results in cracks which are normally at 90° with the horizontal

3. occurs when shear span to effective depth ratio is less than 1

Which of these statements are correct?

Solution:

QUESTION: 10

For M 20 grade of concrete, the maximum shear stress shall not exceed

Solution:

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