The maximum ratio of span to depth of a slab simply supported and spanning in tw

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Question
The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is
Options
A. 25
B. 30
C. 35
D. 40
E. 15

Correct Answer

35

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RCC Structures Design problems

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1. 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
Options
A.
B.
C.
D.
E.

2. If the loading on a prestressed rectangular beam, is uniformly distributed, the tendon to be provided should be .
Options
A. straight below centroidal axis
B. parabolic with convexity downward
C. parabolic with convexity upward
D. straight above centroidal axis
E. none of these.

3. In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed
Options
A. 10 mm
B. 15 mm
C. 20 mm
D. 25 mm
E. 30 mm

4. The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30� and 2000 kg respectively, the effective width of the stem at the bottom, is
Options
A. 51.5
B. 52.5
C. 53.5
D. 54.5
E. 55.5

7. Pick up the correct statement from the following:
Options
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. Lateral reinforcement in R.C.C. columns, is kept not less than 5 mm diameter
E. All the above.

9. Lapped splices in tensile reinforcement are generally not used for bars of size larger than
Options
A. 18 mm diameter
B. 24 mm diameter
C. 30 mm diameter
D. 36 mm diameter
E. 32 mm diameter

10. 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
Options
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
E. three-fifth of the width of the slab.

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