McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 151. |
The angle of repose of a soil is the maximum angle which the outer face of the soil mass makes |
| A. | With the horizontal |
| B. | With the vertical |
| C. | With the perpendicular to the inclined plane of the soil |
| D. | None of these |
| Answer» A. With the horizontal | |
| 152. |
In a doubly-reinforced beam if and is the effective depth and is depth of critical neutral axis, the following relationship holds good |
| A. | mc/t = n/(d - n) |
| B. | (m + c)/t = n/(d + n) |
| C. | (t + c)/n = (d + n)/n |
| D. | mc/t = (d - n)/t |
| Answer» A. mc/t = n/(d - n) | |
| 153. |
A raft foundation is provided if its area exceeds the plan area of the building by |
| A. | 10 % |
| B. | 20 % |
| C. | 40 % |
| D. | 50% |
| Answer» D. 50% | |
| 154. |
In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength |
| A. | 100 kg/cm2 |
| B. | 200 kg/cm2 |
| C. | 300 kg/cm2 |
| D. | 400 kg/cm2 |
| Answer» D. 400 kg/cm2 | |
| 155. |
If p1 is the vertical intensity of pressure at a depth h on a block of earth weighing w per unit p2 is |
| A. | wh (1 - cos )/(1 + ) |
| B. | wh (1 - sin )/(1 + ) |
| C. | wh (1 - tan )/(1 + ) |
| D. | w (1 - cos )/h (1 + sin ) |
| Answer» B. wh (1 - sin )/(1 + ) | |
| 156. |
Pick up the incorrect statement from the following. The intensity of horizontal shear stress at the elemental part of a beam section, is directly proportional to |
| A. | Shear force |
| B. | Area of the section |
| C. | Distance of the C.G. of the area from its neutralaxis |
| D. | Moment of the beam section about its neutral axis |
| Answer» D. Moment of the beam section about its neutral axis | |
| 157. |
According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than |
| A. | 20 cm |
| B. | 30 cm |
| C. | 40 cm |
| D. | 75 cm |
| Answer» B. 30 cm | |
| 158. |
An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 metres and carries a U.D.L. of 3000 kg/m inclusive of its self weight. If the lever arm constant for the section is 0.865, the maximum intensity of shear stress, is |
| A. | 8.3 kg/cm2 |
| B. | 7.6 kg/cm2 |
| C. | 21.5 kg/cm2 |
| D. | 11.4 kg/cm2 |
| Answer» A. 8.3 kg/cm2 | |
| 159. |
The percentage of minimum reinforcement of the gross sectional area in slabs, is |
| A. | 0.10 % |
| B. | 0.12 % |
| C. | 0.15 % |
| D. | 0.18% |
| Answer» C. 0.15 % | |
| 160. |
If the permissible compressive stress for a concrete in bending is C kg/m2 , the modular ratio is |
| A. | 2800/C |
| B. | 2300/2C |
| C. | 2800/3C |
| D. | 2800/C2 |
| Answer» C. 2800/3C | |
| 161. |
An R.C.C. beam not provided with shear reinforcement may develop cracks in its bottom inclined roughly to the horizontal at |
| A. | 25° |
| B. | 35° |
| C. | 45° |
| D. | 55° |
| Answer» C. 45° | |
| 162. |
Cantilever retaining walls can safely be used for a height not more than |
| A. | 3 m |
| B. | 4 m |
| C. | 5 m |
| D. | 6 m |
| Answer» D. 6 m | |
| 163. |
The maximum area of tension reinforcement in beams shall not exceed |
| A. | 0.15 % |
| B. | 1.5 % |
| C. | 4 % |
| D. | 1 % |
| Answer» C. 4 % | |
| 164. |
The width of the flange of a T-beam should be less than |
| A. | One-third of the effective span of the T-beam |
| B. | Distance between the centres of T-beam |
| C. | Breadth of the rib plus twelve times the thickness of the slab |
| D. | Least of theabove |
| Answer» D. Least of theabove | |
| 165. |
For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to maximum positive radial moment, is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 5 |
| Answer» B. 2 | |
| 166. |
According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is |
| A. | 5 kg/cm2 |
| B. | 10 kg/cm2 |
| C. | 15 kg/cm2 |
| D. | 20 kg/cm2 |
| Answer» A. 5 kg/cm2 | |
| 167. |
The width of the flange of a T-beam, which may be considered to act effectively with the rib depends upon |
| A. | Breadth of the rib |
| B. | Overall thickness of the rib |
| C. | Centre to centre distance between T-beams |
| D. | All the above |
| Answer» D. All the above | |
| 168. |
The maximum shear stress (qmax) in a rectangular beam is |
| A. | 1.25 times the average |
| B. | 1.50 timesthe average |
| C. | 1.75 timesthe average |
| D. | 2.0 times theaverage |
| Answer» B. 1.50 timesthe average | |
| 169. |
If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by |
| A. | 0.2 |
| B. | 0.3 |
| C. | 0.4 |
| D. | 0.5 |
| Answer» D. 0.5 | |
| 170. |
If K is a constant depending upon the ratio of the width of the slab to its effective span l, x is the distance of the concentrated load from the nearer support, bw is the width of the area of contact of the concentrated load measured parallel to the supported edge, the effective width of the slab be is |
| A. | K/x (1 + x/d) + bw |
| B. | Kx (1 - x/l) + bw |
| C. | Kx (1 + x/l) + bw |
| D. | All the above |
| Answer» B. Kx (1 - x/l) + bw | |
| 171. |
The length of the straight portion of a bar beyond the end of the hook, should be at least |
| A. | Twice thediameter |
| B. | Thrice thediameter |
| C. | Four times the diameter |
| D. | Seventimes the diameter |
| Answer» D. Seventimes the diameter | |
| 172. |
If the maximum bending moment of a simply supported slab is M Kg.cm, the effective depth of the slab is (where Q is M.R. factor) |
| A. | M/100Q |
| B. | M/ Q |
| C. | M/Q) |
| D. | (M/100Q) |
| Answer» D. (M/100Q) | |
| 173. |
If is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is |
| A. | 0.3 H |
| B. | 0.4 H |
| C. | 0.5 H |
| D. | 0.7 H |
| Answer» D. 0.7 H | |
| 174. |
If diameter of a reinforcement bar is d, the anchorage value of the hook is |
| A. | 4d |
| B. | 8d |
| C. | 12d |
| D. | 16d |
| Answer» D. 16d | |
| 175. |
As per I.S. 456 - 1978, the pH value of water shall be |
| A. | Less than 6 |
| B. | Equal to 6 |
| C. | Not less than 6 |
| D. | Equal to 7 |
| Answer» C. Not less than 6 | |
| 176. |
For M 150 mix concrete, according to I.S. specifications, local bond stress, is |
| A. | 5 kg/cm2 |
| B. | 10 kg/cm2 |
| C. | 15 kg/cm2 |
| D. | 20 kg/cm2 |
| Answer» B. 10 kg/cm2 | |
| 177. |
The minimum cube strength of concrete used for a pre-stressed member, is |
| A. | 50 kg/cm2 |
| B. | 150 kg/cm2 |
| C. | 250 kg/cm2 |
| D. | 350 kg/cm2 |
| Answer» D. 350 kg/cm2 | |
| 178. |
If d and n are the effective depth and depth of the neutral axis respectively of a singly reinforced beam, the lever arm of the beam, is |
| A. | d |
| B. | n |
| C. | d + n/3 |
| D. | d - n/3 |
| Answer» D. d - n/3 | |
| 179. |
The weight of a foundation is assumed as |
| A. | 5% of wallweight |
| B. | 7% of wallweight |
| C. | 10% of wall weight |
| D. | 12% of wallweight |
| Answer» C. 10% of wall weight | |
| 180. |
An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm placed symmetrically along the circumference. If it carries a load of 40, 000 kg axially, the stress is |
| A. | 49.9 kg/cm2 |
| B. | 100 kg/cm2 |
| C. | 250 kg/cm2 |
| D. | 175 kg/cm2 |
| Answer» A. 49.9 kg/cm2 | |
| 181. |
If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than |
| A. | 4 mm |
| B. | 5 mm |
| C. | 6 mm |
| D. | 8 mm |
| Answer» B. 5 mm | |
| 182. |
Design of R.C.C. cantilever beams, is based on the resultant force at |
| A. | Fixed end |
| B. | Free end |
| C. | Mid span |
| D. | Mid span and fixed support |
| Answer» A. Fixed end | |
| 183. |
In a combined footing if shear stress does not exceed 5 kg/cm2 , the nominal stirrups provided are |
| A. | 6 legged |
| B. | 8 legged |
| C. | 10 legged |
| D. | 12 legged |
| Answer» B. 8 legged | |
| 184. |
The maximum shear stress (q) in concrete of a reinforced cement concrete beam is |
| A. | Shearforce/(Lever arm×Width) |
| B. | Lever arm/(Shearforce ×Width) |
| C. | Width/(Lever arm × Shearforce) |
| D. | (Shearforce × Width)/Lever arm |
| Answer» A. Shearforce/(Lever arm×Width) | |
| 185. |
An R.C.C. column is treated as long if its slenderness ratio is greater than |
| A. | 30 |
| B. | 35 |
| C. | 40 |
| D. | 50 |
| Answer» D. 50 | |
| 186. |
The thickness of base slab of a retaining wall generally provided, is |
| A. | One half of the width of the stem at thebottom |
| B. | One-third of the width of the stem at the bottom |
| C. | One fourth of the width ofthe steam at the bottom |
| D. | Width of the stem at the bottom |
| Answer» D. Width of the stem at the bottom | |
| 187. |
Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at |
| A. | Supports |
| B. | Mid span |
| C. | Every section |
| D. | Quarter span |
| Answer» B. Mid span | |
| 188. |
If the maximum shear stress at the end of a simply supported R.C.C. beam of 6 m effective span is 10 kg/cm2 , the share stirrups are provided for a distance from either end where, is |
| A. | 50 cm |
| B. | 100 cm |
| C. | 150 cm |
| D. | 200 cm |
| Answer» C. 150 cm | |
| 189. |
Distribution reinforcement in a simply supported slab, is provided to distribute |
| A. | Load |
| B. | Temperature stress |
| C. | Shrinkage stress |
| D. | All the above |
| Answer» D. All the above | |
| 190. |
Distribution of shear intensity over a rectangular section of a beam, follows: |
| A. | A circular curve |
| B. | A straight line |
| C. | A parabolic curve |
| D. | An ellipticalcurve |
| Answer» C. A parabolic curve | |
| 191. |
In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called |
| A. | Under-reinforced section |
| B. | Over reinforced section |
| C. | Economic section |
| D. | Criticalsection |
| Answer» B. Over reinforced section | |
| 192. |
If the size of a column is reduced above the floor, the main bars of the columns, are |
| A. | Continued up |
| B. | Bent inward at the floor level |
| C. | Stopped just below the floor level and separate lap barsprovided |
| D. | All the above |
| Answer» D. All the above | |
| 193. |
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 |
| Answer» D. All the above | |
| 194. |
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 |
| Answer» A. 2R + T =60 | |
| 195. |
For stairs spanning l metres 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 |
| Answer» D. wl²/16 | |
| 196. |
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 centralaxis |
| Answer» B. Tensile reinforcement | |
| 197. |
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 thespan |
| C. | 1/12th of thespan |
| D. | 1/16th of thespan |
| Answer» C. 1/12th of thespan | |
| 198. |
On piles, the drop must be at least |
| A. | 80 cm |
| B. | 100 cm |
| C. | 120 cm |
| D. | 140 cm |
| Answer» C. 120 cm | |
| 199. |
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 inconcrete |
| D. | Beamsifshear exceeds 4 times allowable shearstress |
| Answer» C. Doubly reinforced beams ignoring compressive stress inconcrete | |
| 200. |
In a pre-stressed beam carrying an external load W with a bent tendon is having angle of -stressed load P. The net downward load at the centre is |
| A. | W - 2P |
| B. | W - P |
| C. | W - P |
| D. | W - 2P |
| Answer» D. W - 2P | |
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