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Free download in PDF RCC Structures Design Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
If is the net upward pressure on a square footing of side for a square column of side , the maximum bending moment is given by
[A]
B.M = pb (c – a)/4
[B]
B.M = pb (b – a)²/4
[C]
B.M = pb (b – a)²/8
[D]
B.M = pb (b + a)/8
Answer: B.M = pb (b – a)²/8
(2)
carrying a uniformly distributed load per metre length is suspended at two
A pile of length
points, the maximum, B.M. at the centre of the pile or at the points of suspension, is
[A]
WL/8
[B]
WL²/24
[C]
WL²/47
[D]
WL²/16
(3)
If the ratio of the span to the overall depth does not exceed 10, the stiffness of the beam will
ordinarily be satisfactory in case of a
[A]
Simply supported beam
[B]
Continuous beam
[C]
Cantilever beam
[D]
None of these
(4)
A pre-stressed concrete member is preferred because
[A]
Its dimensions are not decided from the diagonal tensile stress
[B]
Large size of long beams carrying large shear force need not be adopted
[C]
Removal of cracks in the members due to shrinkage
[D]
All the above
(5)
The width of the flange of a L-beam, should be less than
[A]
One- sixth of the effective span
[B]
Breadth of the rib + four times thickness of the slab
[C]
Breadth of the rib + half clear distance between ribs
[D]
Least of the above
Answer: Least of the above
(6)
Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension
[A]
Two times
[B]
Three times
[C]
Four times
[D]
Five times
(7)
A very comfortable type of stairs is
[A]
Straight
[B]
Dog legged
[C]
Geometrical
[D]
Open newel
(8)
For a ribbed slab
[A]
Clear spacing between ribs shall not be greater than 4.5 cm
[B]
Width of the rib shall not be less than 7.5 cm
[C]
Overall depth of the slab shall not exceed four times the breadth of the rib
[D]
All the above
(9)
Minimum spacing between horizontal parallel reinforcement of the same size should not be less than
[A]
One diameter
[B]
2.5 diameters
[C]
3 diameters
[D]
3.5 diameters
(10)
Lapped splices in tensile reinforcement are generally not used for bars of size larger than
[A]
18 mm diameter
[B]
24 mm diameter
[C]
30 mm diameter
[D]
36 mm diameter
(11)
case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as
[A]
A key
[B]
A cut-off wall
[C]
A rib
[D]
All the above
(12)
Pick up the correct statement from the following:
[A]
Lateral reinforcement in R.C.C. columns is provided to prevent the longitudinal reinforcement from buckling
[B]
Lateral reinforcement prevents the shearing of concrete on diagonal plane
[C]
Lateral reinforcement stops breaking away of concrete cover, due to buckling
[D]
All the above
(13)
The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept
[A]
0.7
[B]
0.8
[C]
0.9
[D]
0.6
(14)
If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is
[A]
Square
[B]
Rectangular
[C]
Trapezoidal
[D]
Triangular
(15)
The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is
[A]
35
[B]
25
[C]
30
[D]
20
(16)
fixed at its ends, the If is the uniformly distributed load on a circular slab of radius maximum positive radial moment at its centre, is
[A]
3WR²/16
[B]
2WR²/16
[C]
WR²/16
[D]
None of these
(17)
the column head support a flat slab, is generally kept The diameter of
[A]
0.25 times the span length
[B]
0.25 times the diameter of the column
[C]
4.0 cm larger than the diameter of the column
[D]
5.0 cm larger than the diameter of the column
Answer: 0.25 times the span length
(18)
The load stress of a section can be reduced by
[A]
Decreasing the lever arm
[B]
Increasing the total perimeter of bars
[C]
Replacing larger bars by greater number of small bars
[D]
Replacing smaller bars by greater number of greater bars
Answer: Replacing larger bars by greater number of small bars
(19)
According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is
[A]
Half of the width of the slab
[B]
Two -third of the width of the slab
[C]
Three-fourth of the width of the slab
[D]
Four-fifth of the width of the slab
Answer: Three-fourth of the width of the slab
(20)
An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm2, the beam
[A]
Is safe in shear
[B]
Is safe with stirrups
[C]
Is safe with stirrups and inclined bars
[D]
Needs revision of section
Answer: Needs revision of section
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