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Free download in PDF RCC Structures Design Multiple Choice Questions with 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.
61
If L is the effective span of a R.C.C. beam which is subjected to maximum shear qmax at the ends, the distance from either end over which stirrups for the shear, are provided, is
[A]
(L/2) (1 – 3/qmax)
[B]
(L/3) (1 – 5/qmax)
[C]
(L/2) (1 – 5/qmax)
[D]
(L/2) (1 – 2/q )
Answer: (L/2) (1 – 5/qmax)
62
If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept
[A]
4.5 m
[B]
4.0 m
[C]
3.5 m
[D]
3.0 m
63
The thickness of the topping of a ribbed slab, varies between
[A]
3 cm to 5 cm
[B]
5 cm to 8 cm
[C]
8 cm to 10 cm
[D]
12 cm to 15 cm
64
The zone in which transverse bending is likely to occur may be obtained by drawing a line from the
[A]
30°
[B]
45°
[C]
60°
[D]
None of these
65
An R.C.C. column is treated as short column if its slenderness ratio is less than
[A]
30
[B]
35
[C]
40
[D]
50
66
The advantage of reinforced concrete, is due to
[A]
Monolithic character
[B]
Fire-resisting and durability
[C]
Economy because of less maintenance cost
[D]
All the above
67
Pick up the assumption for the design of a pre-stressed concrete member from the following:
[A]
A transverse plane section remains a plane after bending
[B]
During deformation limits, Hook’s law is equally applicable to concrete as well as to steel
[C]
Variation of stress in reinforcement due to changes in external loading is negligible
[D]
All the above
68
Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than
[A]
42 diameters from the centre of the column
[B]
42 diameters from the inner edge of the column
[C]
42 diameters from the outer edge of the column
[D]
24 diameters from the centre of the column
Answer: 42 diameters from the outer edge of the column
69
The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is
[A]
1400 kg/cm2
[B]
190 kg/cm2
[C]
260 kg/cm2
[D]
230 kg/cm2
70
As per IS : 456, the reinforcement in a column should not be less than
[A]
0.5% and not more than 5% of cross-sectional area
[B]
0.6% and not more than 6% of cross-sectional area
[C]
0.7% and not more than 7% of cross-sectional area
[D]
0.8% and not more than 8% of cross-sectional area
Answer: 0.8% and not more than 8% of cross-sectional area
71
Spacing of stirrups in a rectangular beam, is
[A]
Kept constant throughout the length
[B]
Decreased towards the centre of the beam
[C]
Increased at the ends
[D]
Increased at the centre of the beam
Answer: Increased at the centre of the beam
72
Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made by
[A]
Rankine formula
[B]
Marcus formula
[C]
Rankine Grashoff formula
[D]
Grashoff formula
Answer: Rankine Grashoff formula
73
The Young’s modulus of elasticity of steel, is
[A]
150 KN/mm2
[B]
200 KN/mm2
[C]
250 KN/mm2
[D]
275 KN/mm2
74
If the tendon is placed at an rectangular beam (sectional top edge
[A]
Is increased by PZ/e
[B]
Is increased by Pe/Z
[C]
Is decreased by Pe/Z
[D]
Remains unchanged
Answer: Is decreased by Pe/Z
75
Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of
[A]
h /4
[B]
h/3
[C]
h/2
[D]
2h/3
76
If the length of a combined footing for two columns l metres apart is L and the projection on the
left side of the exterior column is x, then the projection y on the right side of the exterior column,
in order to have a uniformly distributed load, is (where is the distance of centre of gravity of
column loads) .
[A]
y = L – (l – )
[B]
y = L/2 + (l –)
[C]
y = L/2 – (l + )
[D]
y = L/2 – (l – )
77
For initial estimate for a beam design, the width is assumed
[A]
1/15th of span
[B]
1/20th of span
[C]
1/25th of span
[D]
1/30th of span
78
If q is the punching shear resistance per unit area a, is the side of a square footing for a column of side b, carrying a weight W including the weight of the footing, the depth D. of the footing from punching shear consideration, is
[A]
D = W (a – b)/4a²bq
[B]
D = W (a² – b²)/4a²bq
[C]
D = W (a² – b²)/8a²bq
[D]
D = W (a² – b²)/4abq
Answer: D = W (a² – b²)/4a²bq
79
The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is
[A]
25
[B]
30
[C]
35
[D]
40
80
If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the corresponding load per square metre of the horizontal area, is
[A]
w (R + T)/T
[B]
w (R² + T²)/T
[C]
w (R + T)/T
[D]
w (R/T)
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