RCC STRUCTURES DESIGN QUIZ

The breadth of a ribbed slab containing two bars must be between

10 cm to 12 cm

12 cm to 15 cm

8 cm to 10 cm

6 cm to 7.5 cm

TRUE ANSWER : ?
YOUR ANSWER : ?

In a singly reinforced beam

Elastic moduli for concrete and steel have different values within the limits of deformation of the beam

Compression is borne entirely by concrete

Plane sections transverse to the centre line of the beam before bending remain plane after bending

Steel possesses initial stresses when embedded in concrete

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A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is

35

40

45

30

TRUE ANSWER : ?
YOUR ANSWER : ?

The minimum thickness of a flat slab is taken

L/36 for end panels without drops

All listed here

L/32 for end panels without drops

L/36 for interior panels without drop

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YOUR ANSWER : ?

In a beam the local bond stress Sb, is equal to

Shear force/(Leaver arm × Total perimeter of reinforcement)

Leaver arm/(Shear force × Total perimeter of reinforcement)

Total perimeter of reinforcement/(Leaver arm × Shear force)

Leaver arm/(Bending moment × Total perimeter of reinforcement)

TRUE ANSWER : ?
YOUR ANSWER : ?

A pre-stressed concrete member is preferred because

Large size of long beams carrying large shear force need not be adopted

Removal of cracks in the members due to shrinkage

Its dimensions are not decided from the diagonal tensile stress

All listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

In the zone of R.C.C. beam where shear stress is less than 5 kg/cm², nominal reinforcement is provided at a pitch of

Lever arm of the section

One and half lever arm of the section

One-third lever arm of the section

One-half lever arm of the section

TRUE ANSWER : ?
YOUR ANSWER : ?

The load stress of a section can be reduced by

Increasing the total perimeter of bars

Replacing larger bars by greater number of small bars

Decreasing the lever arm

Replacing smaller bars by greater number of greater bars

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YOUR ANSWER : ?

An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encased with the floor of a hall 12 meters by 7 meters, is spaced at 3 meters from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is

236 cm

233 cm

300 cm

176 cm

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum shear stress (q) in concrete of a reinforced cement concrete beam is

(Shear force × Width)/Lever arm

Width/(Lever arm × Shear force)

Lever arm/(Shear force × Width)

Shear force/(Lever arm × Width)

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YOUR ANSWER : ?