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/cm2 and 300 kg/cm2, 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) 2R + T
= 60
- (B) R + 2T
= 60
- (C) 2R + T
= 30
- (D) R +
2T= 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/2jdƩO
- (B) Q/3jdƩO
- (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 - 2P cos θ
- (B) W - P cos
θ
- (C) W - P sin
θ
- (D) W - 2P 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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