The floor slab of a building is supported on reinforced cement floor beams. The

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Question
The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept
Options
A. 0.7
B. 0.8
C. 0.9
D. 0.6
E. none of these.

Correct Answer

0.9

RCC Structures Design problems

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2. The load stress of a section can be reduced by
Options
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
E. none of these.

3. Minimum spacing between horizontal parallel reinforcement of the same size should not be less than
Options
A. one diameter
B. 2.5 diameters
C. 3 diameters
D. 3.5 diameters
E. 4 diameters

5. The minimum thickness of a flat slab is taken
Options
A. 13 cm
B. L/32 for end panels without drops
C. L/36 for end panels without drops
D. L/36 for interior panels without drop
E. all the above.

6. Spacing of stirrups in a rectangular beam, is
Options
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.

7. If M_d and M_t are the maximum bending moments due to dead load and live load respectively and F is the total effective pressure, for a balanced design of a prestreseed concrete beam of steel, is
Options
A.
B.
C.
D.

8. In a prestressed member it is advisable to use
Options
A. low strength concrete only
B. high strength concrete only
C. low strength concrete but high tensile steel
D. high strength concrete and high tensile steel
E. high strength concrete but low tensile steel

9. For a ribbed slab
Options
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.

10. If the neutral axis of a T-beam is below the slab, the relationship between the flange width B, depth of neutral axis n, thickness of the slab ds, effective depth of the beam d, gross area of tensile steel A_t and the modular ratio m may be stated as
Options
A.
B.
C.
D. Bds(n - ds) = mAt(d - n)

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