# Practice Test: Question Set - 14

**1. The minimum number of main steel bars provided in R.C.C.**

- (A) Rectangular
columns is 4

- (B) Circular
columns is 6

- (C) Octagonal
columns is 8

- (D) All the
above

**2. A short column 20 cm × 20 cm in section is reinforced with 4 bars whose area of cross section is 20 sq. cm. If permissible compressive stresses in concrete and steel are 40 kg/cm**

^{2}and 300 kg/cm^{2}, the Safe load on the column, should not exceed- (A) 4,120 kg

- (B) 41,200 kg

- (C) 412,000 kg

- (D) None
of these

**3. If**

*T*and*R*are tread and rise respectively of a stair, then- (A) 2

*R*+

*T*= 60

- (B)

*R*+ 2

*T*= 60

- (C) 2

*R*+

*T*= 30

- (D)

*R*+ 2

*T*= 30

**4. For stairs spanning**

*l*meters longitudinally between supports at the bottom and top of a flight carrying a load*w*per unit horizontal area, the maximum bending moment per metre width, is- (A)

*wl²*/4

- (B)

*wl²*/8

- (C)

*wl²*/12

- (D)

*wl²*/16

**5. In a singly reinforced beam, the effective depth is measured from its compression edge to**

- (A) Tensile
edge

- (B) Tensile
reinforcement

- (C) Neutral axis
of the beam

- (D) Longitudinal
central axis

**6. Though the effective depth of a T-beam is the distance between the top compression edge to the centre of the tensile reinforcement, for heavy loads, it is taken as**

- (A) 1/8th
of the span

- (B) 1/10th of
the span

- (C) 1/12th of
the span

- (D) 1/16th of
the span

**7. If**

*jd*is the lever arm and ΣO is the total perimeter of reinforcement of an R.C.C. beam, the bond stress at the section having*Q*shear force, is- (A)

*Q*/2

*jdƩO*

- (B)

*Q*/3

*jdƩO*

- (C)

*Q*/

*jdƩO*

- (D) 2

*×*

*Q*/

*jdƩO*

**8. On piles, the drop must be at least**

- (A) 80 cm

- (B) 100 cm

- (C) 120 cm

- (D) 140 cm

**9. Steel beam theory is used for**

- (A) Design of
simple steel beams

- (B) Steel beams
encased in concrete

- (C) Doubly
reinforced beams ignoring compressive stress in concrete

- (D) Beams
if shear exceeds 4 times allowable shear stress

**10. In a pre-stressed beam carrying an external load**

*W*with a bent tendon is having angle of inclination θ and pre-stressed load*P*. The net downward load at the centre is- (A)

*W -*2

*P*cos θ

- (B)

*W - P*cos θ

- (C)

*W - P*sin θ

- (D)

*W -*2

*P*sin θ

**11. To have pressure wholly compressive under the base of a retaining wall of width**

*b*, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than- (A)

*b*/3

- (B)

*b*/4

- (C)

*b*/5

- (D)

*b*/6

**12. The diameter of longitudinal bars of a column should never be less than**

- (A) 6 mm

- (B) 8 mm

- (C) 10 mm

- (D) 12 mm

**13. Post tensioning system**

- (A) Was widely
used in earlier days

- (B) Is not
economical and hence not generally used

- (C) Is
economical for large spans and is adopted now a days

- (D) None of
these

**14. The number of treads in a flight is equal to**

- (A) Risers in
the flight

- (B) Risers plus
one

- (C) Risers minus
one

- (D) None of
these

**15. The amount of reinforcement for main bars in a slab, is based upon**

- (A) Minimum
bending moment

- (B) Maximum
bending moment

- (C) Maximum
shear force

- (D) Minimum
shear force

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