RCC STRUCTURES DESIGN QUIZ

In a pre-stressed member it is advisable to use

Low strength concrete but high tensile steel

High strength concrete and high tensile steel

High strength concrete only

Low strength concrete only

TRUE ANSWER : ?
YOUR ANSWER : ?

If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is:

(1 - C) mf - eE

(C - 1) mf + eE

(1 - C) mf + eE

(C - 1) mf - eE

TRUE ANSWER : ?
YOUR ANSWER : ?

The diameter of the column head support a flat slab, is generally kept

4.0 cm larger than the diameter of the column

0.25 times the diameter of the column

0.25 times the span length

5.0 cm larger than the diameter of the column

TRUE ANSWER : ?
YOUR ANSWER : ?

The modular ratio ‘m’ of a concrete whose permissible compressive stress is ‘C’, may be obtained from the equation.

m = 3500/3C

m = 700/3C

m = 2800/3C

m = 1400/3C

TRUE ANSWER : ?
YOUR ANSWER : ?

The design of heel slab of a retaining wall is based on the maximum bending moment due to:

Load of the surcharge, if any

Its own weight

Weight of the soil above it

All listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm², the length of the beam having nominal reinforcement, is

10 cm

8 cm

12 cm

6 cm

TRUE ANSWER : ?
YOUR ANSWER : ?

If the depth of actual neutral axis of a doubly reinforced beam

Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously

Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier

Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier

All listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

The load stress of a section can be reduced by

Replacing larger bars by greater number of small bars

Replacing smaller bars by greater number of greater bars

Decreasing the lever arm

Increasing the total perimeter of bars

TRUE ANSWER : ?
YOUR ANSWER : ?

The shear reinforcement in R.C.C. is provided to resist

Vertical shear

Horizontal shear

Diagonal tension

Diagonal compression

TRUE ANSWER : ?
YOUR ANSWER : ?

Cantilever retaining walls can safely be used for a height not more than

6 m

4 m

3 m

5 m

TRUE ANSWER : ?
YOUR ANSWER : ?