Practice Test: Question Set - 15
1. [A + (m - 1)ASC] known as equivalent concrete area of R.C.C. is given by
- (A) Modular
ratio method
- (B) Load
factor method
- (C) Ultimate
load method
- (D) None of
these
2. A simply supported beam 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm2, the area of steel required, is
- (A) 14 cm2
- (B) 15 cm2
- (C) 16 cm2
- (D) 17 cm2
3. The anchorage value of a hook is assumed sixteen times the diameter of the bar if the angle of the bend, is
- (A) 30°
- (B) 40°
- (C) 45°
- (D) All
the above
4. If a rectangular pre-stressed beam of an effective span of 5 meters and carrying a total load 3840 kg/m, is designed by the load balancing method, the central dip of the parabolic tendon should be
- (A) 5
cm
- (B) 10 cm
- (C) 15
cm
- (D) 20 cm
5. If permissible working stresses in steel and concrete are respectively 1400 kg/cm2 and 80 kg/cm2 and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, is
- (A) 37
cm
- (B) 38 cm
- (C) 39 cm
- (D) 40 cm
6. The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm2, safe shear stress 5 kg/cm2 and B.M. 24 mt,
- (A) Is
safe in shear
- (B) Is unsafe in
shear
- (C) Is
over safe in shear
- (D) Needs
redesigning
7. If a bent tendon is required to balance a concentrated load W at the centre of the span L, the central dip h must be at least
- (A) WL/P
- (B) WL/2P
- (C) WL/3P
- (D) WL/4P
8. If the effective length of a 32 cm diameter R.C.C. column is 4.40 m, its slenderness ratio, is
- (A) 40
- (B) 45
- (C) 50
- (D) 55
9. If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than
- (A) WL/12 (L - 2D/3)²
- (B) WL/10 (L + 2D/3)²
- (C) WL/10 (L - 2D/3)²
- (D) WL/12 (L - D/3)²
10. Piles are usually driven by
- (A) Diesel
operated hammer
- (B) Drop
hammer
- (C) Single
acting steam hammer
- (D) All
the above
11. A circular slab subjected to external loading, deflects to form a
- (A) Semi-hemisphere
- (B) Ellipsoid
- (C) Paraboloid
- (D) None
of these
12. In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at
- (A) Less
loaded column
- (B) More loaded
column
- (C) A
point of the maximum shear force
- (D) A point of
zero shear force
13. If the average bending stress is 6 kg/cm2 for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is
- (A) 28 d
- (B) 38 d
- (C) 48 d
- (D) 58 d
14. The live load to be considered for an inaccessible roof, is
- (A) Nil
- (B) 75 kg/m2
- (C) 150 kg/cm2
- (D) 200 kg/m2
15. A pile of length ‘L’ carrying a uniformly distributed load ‘W’ per metre length is suspended at the centre and from other two points 0.15 L from either end ; the maximum hogging moment will be
- (A) WL²/15
- (B) WL²/30
- (C) WL²/60
- (D) WL²/90
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