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201. |
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 |
Answer» D. b/6 |
202. |
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 |
Answer» D. 12 mm |
203. |
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 |
Answer» C. Risers minus one |
204. |
The amount of reinforcement for main bars in a slab, is based upon |
A. | Minimumbendingmoment |
B. | Maximumbendingmoment |
C. | Maximum shear force |
D. | Minimum shear force |
Answer» B. Maximumbendingmoment |
205. |
The shear reinforcement in R.C.C. is provided to resist |
A. | Vertical shear |
B. | Horizontal shear |
C. | Diagonal compression |
D. | Diagonal tension |
Answer» D. Diagonal tension |
206. |
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 |
Answer» C. 16 cm2 |
207. |
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 |
Answer» D. All the above |
208. |
A circular slab subjected to external loading, deflects to form a |
A. | Semi-hemisphere |
B. | Ellipsoid |
C. | Paraboloid |
D. | None of these |
Answer» C. Paraboloid |
209. |
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 |
Answer» B. 10 cm |
210. |
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 |
Answer» B. Is unsafe in shear |
211. |
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 |
Answer» D. WL/4P |
212. |
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 |
Answer» D. 55 |
213. |
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 - /3)² |
B. | WL/10 (L + /3)² |
C. | WL/10 (L - /3)² |
D. | WL/12 (L - /3)² |
Answer» C. WL/10 (L - /3)² |
214. |
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 shearforce |
D. | A point of zero shear force |
Answer» D. A point of zero shear force |
215. |
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 |
Answer» D. 58 d |
216. |
An R.C.C. roof slab is designed as a two way slab if |
A. | It supports live loads in both directions |
B. | The ratio of spans in two directions is less than2 |
C. | The slab is continuous over two supports |
D. | The slab is discontinuous at edges |
Answer» B. The ratio of spans in two directions is less than2 |
217. |
The advantage of a concrete pile over a timber pile, is |
A. | No decay due to termites |
B. | No restriction on length |
C. | Higherbearing capacity |
D. | All the above |
Answer» D. All the above |
218. |
The maximum ratio of span to depth of a cantilever slab, is |
A. | 8 |
B. | 10 |
C. | 12 |
D. | 16 |
Answer» C. 12 |
219. |
A pre-stressed concrete member |
A. | Is made of concrete |
B. | Is made of reinforced concrete |
C. | Is stressed after casting |
D. | Possessesinternal stresses |
Answer» D. Possessesinternal stresses |
220. |
A flat slab is supported |
A. | On beams |
B. | On columns |
C. | On beams and columns |
D. | On columns monolithically built with slab |
Answer» D. On columns monolithically built with slab |
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