Objective Test on RCC Structures Design - Set 10 - ObjectiveBooks

# Practice Test: Question Set - 10

1. Based on punching shear consideration, the overall depth of a combined footing under a column A, is
(A) (Area of the column A × Safe punching stress)/Load on column A
(B) (Perimeter of column A × Safe punching stress)/(Load on column A + Upward pressure × Area of the column)
(C) (Perimeter of column A × Safe punching stress)/(Load on column A × Upward pressure × Area of the column)
(D) None of these

2. Pick up the correct statement from the following:
(A) A pile is a slender member which transfers the load through its lower end on a strong strata
(B) A pile is a slender member which transfers its load to the surrounding soil
(C) A pile is a slender member which transfers its load by friction
(D) A pile is a cylindrical body of concrete which transfers the load at a depth greater than its width

3. In a combined footing if shear stress exceeds 5 kg/cm2, the nominal stirrups provided are:
(A) 6 legged
(B) 8 legged
(C) 10 legged
(D) 12 legged

4. The weight of reinforced concrete, is generally taken as
(A) 2200 kg/m3
(B) 2300 kg/m3
(C) 2400 kg/m3
(D) 2500 kg/m3

5. If W is the load on a circular slab of radius R, the maximum circumferential moment at the centre of the slab, is
(A) WR²/16
(B) 2WR²/16
(C) 3WR²/16
(D) Zero

6. If ‘W’ is weight of a retaining wall and ‘P’ is the horizontal earth pressure, the factor of safety against sliding, is
(A) 1.0
(B) 1.25
(C) 1.5
(D) 2.0

7. The effective span of a simply supported slab, is
(A) Distance between the centers of the bearings
(B) Clear distance between the inner faces of the walls plus twice the thickness of the wall
(C) Clear span plus effective depth of the slab
(D) None of these

8. In a beam the local bond stress Sb, is equal to
(A) Shear force/(Leaver arm × Total perimeter of reinforcement)
(B) Total perimeter of reinforcement/(Leaver arm × Shear force)
(C) Leaver arm/(Shear force × Total perimeter of reinforcement)
(D) Leaver arm/(Bending moment × Total perimeter of reinforcement)

9. A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth, is
(A) 2.5
(B) 2.0
(C) Less than 2
(D) Less than 2.5

10. With usual notations the depth of the neutral axis of a balanced section, is given by
(A) mc/t = (d - n)/n
(B) t/mc = (d - n)/n
(C) t/mc = (d + n)/n
(D) mc/t = n/(d - n)

11. Pick up the true statement from the following:
(A) Plain ceiling provides the best property diffusing light
(B) In the absence of beams, it is easier to install piping
(C) In the absence of beams, it is easier to paint
(D) All the above

12. If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm2, the length of the beam having nominal reinforcement, is
(A) 12 cm
(B) 6 cm
(C) 8 cm
(D) 10 cm

13. If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment
(A) WL/2
(B) WL/4
(C) WL/6
(D) WL/8

14. The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously, is called
(A) Balanced section
(B) Economic section
(C) Critical section
(D) All the above

15. The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or
(A) 12 bar diameters
(B) 18 bar diameters
(C) 24 bar diameters
(D) 30 bar diameters

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