A foundation is called shallow if its depth, is one-fourth of its width half of

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Question
A foundation is called shallow if its depth, is
Options
A. one-fourth of its width
B. half of its width
C. three-fourth of its width
D. equal to its width
E. all the above.

Correct Answer

equal to its width

RCC Structures Design problems

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1. The angle of internal friction of soil mass is the angle whose
Options
A. tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane
B. sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane
C. cosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane
D. none of these.

3. Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than
Options
A. one diameter of thinner bar
B. one diameter of thicker bar
C. sum of the diameters of ihinner and thicker bars
D. twice the diameter of thinner bar
E. none of these.

4. An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000 kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is
Options
A. safe in shear
B. is safe with stirrups
C. is safe with stirrups and inclined members
D. needs revision of the section.

6. An R.C.C. roof slab is designed as a two way slab if
Options
A. it supports live loads in both directions
B. the ratio of spans in two directions is less than 2
C. the slab is continuous over two supports
D. the slab is discontinuous at edges.

7. If At is the gross area of steel in tension, d is the effective depth of the beam and y is the depth of the centre of gravity of the resultant compression, the moment of resistance M of the beam, is given by
Options
A. M = At(d - y)
B. M = Atf(d - y)
C. M = Atf(d + y)
D. M =
E. none of these.

8. Top bars are extended to the projecting parts of the combined footing of two columns L distance apart for a distance of
Options
A. 0.1 L from the outer edge of column
B. 0.1 L from the centre edge of column
C. half the distance of projection
D. one-fourth the distance of projection.

9. In a doubly-reinforced beam if c and t are stresses in concrete and tension reinforcement, d is the effective depth and n is depth of critical neutral axis n, the following relationship holds good
Options
A.
B.
C.
D.
E.

10. If the size of a column is reduced above the floor, the main bars of the columns, are
Options
A. continued up
B. bent inward at the floor level
C. stopped just below the floor level and separate lap bars provided
D. all the above.

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