MCQOPTIONS
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MCQOPTIONS
This section includes 204 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
If the tendon is placed at an eccentricity e below the centroidal axis of the longitudinal axis of a rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme top edge$? |
| A. | Is increased by PZ/e |
| B. | Is increased by Pe/Z |
| C. | Is decreased by Pe/Z |
| D. | Remains unchanged |
| Answer» D. Remains unchanged | |
| 152. |
If the ratio of long and short spans of a two way slab with corners held down is r, the actual reduction of B.M. is given by$? |
| A. | (5/6) (r/1 + r²) M |
| B. | (5/6) (r²/1 + r²) M |
| C. | (5/6) (r²/1 + r³) M |
| D. | (5/6) (r²/1 + r⁴) M |
| Answer» E. | |
| 153. |
Lapped splices in tensile reinforcement are generally not used for bars of size larger than$? |
| A. | 18 mm diameter |
| B. | 24 mm diameter |
| C. | 30 mm diameter |
| D. | 36 mm diameter |
| Answer» E. | |
| 154. |
According to the steel beam theory of doubly reinforced beams$? |
| A. | Tension is resisted by tension steel |
| B. | Compression is resisted by compression steel |
| C. | Stress in tension steel equals the stress in compression steel |
| D. | All the above |
| Answer» E. | |
| 155. |
If the shear stress in a R.C.C. beam is$? |
| A. | Equal or less than 5 kg/cm², no shear reinforcement is provided |
| B. | Greater than 4 kg/cm², but less than 20 kg/cm², shear reinforcement is provided |
| C. | Greater than 20 kg/cm², the size of the section is changed |
| D. | All the above |
| Answer» E. | |
| 156. |
If the shear stress in a R.C.C. beam is? |
| A. | Equal or less than 5 kg/cm², no shear reinforcement is provided |
| B. | Greater than 4 kg/cm², but less than 20 kg/cm², shear reinforcement is provided |
| C. | Greater than 20 kg/cm², the size of the section is changed |
| D. | All the above |
| Answer» E. | |
| 157. |
In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed? |
| A. | 10 mm |
| B. | 15 mm |
| C. | 20 mm |
| D. | 25 mm |
| Answer» E. | |
| 158. |
The horizontal portion of a step in a stairs case, is known as? |
| A. | Rise |
| B. | Flight |
| C. | Winder |
| D. | Tread |
| Answer» E. | |
| 159. |
The minimum thickness of a flat slab is taken? |
| A. | L/32 for end panels without drops |
| B. | L/36 for end panels without drops |
| C. | L/36 for interior panels without drop |
| D. | All the above |
| Answer» E. | |
| 160. |
In a beam the local bond stress Sb, is equal to? |
| A. | Shear force/(Leaver arm √ó Total perimeter of reinforcement) |
| B. | Total perimeter of reinforcement/(Leaver arm √ó Shear force) |
| C. | Leaver arm/(Shear force √ó Total perimeter of reinforcement) |
| D. | Leaver arm/(Bending moment √ó Total perimeter of reinforcement) |
| Answer» B. Total perimeter of reinforcement/(Leaver arm ‚àö√≥ Shear force) | |
| 161. |
The modular ratio ‘m’ of a concrete whose permissible compressive stress is ‘C’, may be obtained from the equation.? |
| A. | m = 700/3C |
| B. | m = 1400/3C |
| C. | m = 2800/3C |
| D. | m = 3500/3C |
| Answer» D. m = 3500/3C | |
| 162. |
In a slab, the pitch of the main reinforcement should not exceed its effective depth? |
| A. | Three times |
| B. | Four times |
| C. | Five times |
| D. | Two times |
| Answer» B. Four times | |
| 163. |
If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm², the length of the beam having nominal reinforcement, is? |
| A. | 12 cm |
| B. | 6 cm |
| C. | 8 cm |
| D. | 10 cm |
| Answer» D. 10 cm | |
| 164. |
If diameter of a reinforcement bar is d, the anchorage value of the hook is |
| A. | 4d |
| B. | 8d |
| C. | 12d |
| D. | 16d |
| Answer» E. | |
| 165. |
If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm² and 1400 kg/cm² respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is$ |
| A. | 0.496 % |
| B. | 0.596 % |
| C. | 0.696 % |
| D. | 0.796 % |
| Answer» D. 0.796 % | |
| 166. |
‘P’ is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is ‘A’ and sectional modulus is ‘Z’. The maximum stress ‘f’ in the beam, subjected to a maximum bending moment ‘M’, is$ |
| A. | f = (P/'+ (Z/M) |
| B. | f = (A/P) + (M/Z) |
| C. | f = (P/A) + (M/Z) |
| D. | f = (P/A) + (M/6Z) |
| Answer» D. f = (P/A) + (M/6Z) | |
| 167. |
If p1 is the vertical intensity of pressure at a depth h on a block of earth weighing w per unit volume and the angle of repose φ, the lateral intensity of pressure p2 is$ |
| A. | wh (1 - cos φ)/(1 + sin φ) |
| B. | wh (1 - sin φ)/(1 + sin φ) |
| C. | wh (1 - tan φ)/(1 + tan φ) |
| D. | w (1 - cos φ)/h (1 + sin φ) |
| Answer» C. wh (1 - tan ≈ì√ú)/(1 + tan ≈ì√ú) | |
| 168. |
A singly reinforced beam has breadth b, effective depth d, depth of neutral axis n and critical neutral axis n?. If fc and ft are permissible compressive and tensile stresses, the moment to resistance of the beam, is |
| A. | bn (fc/2) (d - n/3) |
| B. | Atft (d - n/3) |
| C. | ½ n₁ (1 - n₁/3) cbd² |
| D. | All the above |
| Answer» E. | |
| 169. |
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 |
| Answer» E. | |
| 170. |
A pre-cast pile generally used, is |
| A. | Circular |
| B. | Square |
| C. | Octagonal |
| D. | Square with corners chamfered |
| Answer» E. | |
| 171. |
According to load factor method, the permissible load ‘W’ on a short column reinforced with longitudinal bars and lateral stirrups, is$ |
| A. | Stress in concrete √ó area of concrete |
| B. | Stress in steel √ó area of steel |
| C. | Stress in concrete √ó area of concrete + Stress in steel √ó area of steel |
| D. | None of these |
| Answer» D. None of these | |
| 172. |
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 than 2 |
| C. | The slab is continuous over two supports |
| D. | The slab is discontinuous at edges |
| Answer» C. The slab is continuous over two supports | |
| 173. |
The width of the rib of a T-beam, is generally kept between |
| A. | 1/7 to 1/3 of rib depth |
| B. | 1/3 to 1/2 of rib depth |
| C. | 1/2 to 3/4 of rib depth |
| D. | 1/3 to 2/3 of rib depth |
| Answer» E. | |
| 174. |
An R.C.C. column is treated as short column if its slenderness ratio is less than |
| A. | 30 |
| B. | 35 |
| C. | 40 |
| D. | 50 |
| Answer» E. | |
| 175. |
‘P’ is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is ‘A’ and sectional modulus is ‘Z’. The minimum stress ‘f’ on the beam subjected to a maximum bending moment ‘M’ is$ |
| A. | f = (P/'- (Z/M) |
| B. | f = (A/P) - (M/Z) |
| C. | f = (P/A) - (M/Z) |
| D. | f = (P/A) - (M/6Z) |
| Answer» D. f = (P/A) - (M/6Z) | |
| 176. |
An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm², the beam$ |
| A. | Is safe in shear |
| B. | Is safe with stirrups |
| C. | Is safe with stirrups and inclined bars |
| D. | Needs revision of section |
| Answer» E. | |
| 177. |
If the length of an intermediate span of a continuous slab is 5 m, the length of the end span is kept |
| A. | 4.5 m |
| B. | 4.0 m |
| C. | 3.5 m |
| D. | 3.0 m |
| Answer» B. 4.0 m | |
| 178. |
In a pre-stressed beam carrying an external load W with a bent tendon is having angle of inclination ? 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 |
| Answer» E. | |
| 179. |
An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 meters 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» B. 7.6 kg/cm¬¨‚⧠| |
| 180. |
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 elliptical curve |
| Answer» D. An elliptical curve | |
| 181. |
If l‚ÇÅ and l‚ÇÇ are the lengths of long and short spans of a two way slab simply supported on four edges and carrying a load w per unit area, the ratio of the loads split into w‚ÇÅ and w‚ÇÇ acting on strips parallel to l‚ÇÇ and l‚ÇÅ is# |
| A. | w‚ÇÅ/w‚ÇÇ = l‚ÇÇ/l‚ÇÅ |
| B. | w₁/w₂ = (l₂/l₁)² |
| C. | w₁/w₂ = (l₂/l₁)³ |
| D. | w‚ÇÅ/w‚ÇÇ = (l‚ÇÇ/l‚ÇÅ)‚Å¥ |
| Answer» E. | |
| 182. |
If the modular ratio is ‘m’, steel ratio is ‘r’ and overall depth of a beam is ‘d’, the depth of the critical neutral axis of the beam, is# |
| A. | [m/(m - r)] d |
| B. | [m/(m + r)] d |
| C. | [(m + r)/m] d |
| D. | [(r - m)/m] d |
| Answer» C. [(m + r)/m] d | |
| 183. |
If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the corresponding load per square metre of the horizontal area, is |
| A. | w (R + T)/T |
| B. | w ‚à ö(R¬≤ + T¬≤)/T |
| C. | w ‚à ö(R + T)/T |
| D. | w (R/T) |
| Answer» C. w ‚Äö√ √∂(R + T)/T | |
| 184. |
A very comfortable type of stairs is |
| A. | Straight |
| B. | Dog legged |
| C. | Geometrical |
| D. | Open newel |
| Answer» E. | |
| 185. |
In a combined footing if shear stress exceeds 5 kg/cm², the nominal stirrups provided are:# |
| A. | 6 legged |
| B. | 8 legged |
| C. | 10 legged |
| D. | 12 legged |
| Answer» E. | |
| 186. |
On an absolutely rigid foundation base, the pressure will |
| A. | Be more at the edges of the foundation |
| B. | Be uniform |
| C. | Not be uniform |
| D. | Be zero at the centre of the foundation |
| Answer» D. Be zero at the centre of the foundation | |
| 187. |
If Ac, Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and σc are the modular ratio and maximum stress in the configuration of concrete, the strength of column is# |
| A. | σcAc + m σcAsc |
| B. | σc(A - Asc) + m σcAsc |
| C. | σc[A + (m - 1)Asc] |
| D. | All the above |
| Answer» E. | |
| 188. |
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» E. | |
| 189. |
The zone in which transverse bending is likely to occur may be obtained by drawing a line from the faces of the column making an angle θ° with horizontal where θ° is# |
| A. | 30° |
| B. | 45° |
| C. | 60° |
| D. | None of these |
| Answer» C. 60¬¨‚àû | |
| 190. |
If the length of a combined footing for two columns l meters apart is L and the projection on the left side of the exterior column is x, then the projection y on the right side of the exterior column, in order to have a uniformly distributed load, is (where xÃÖ is the distance of centre of gravity of column loads).# |
| A. | y = L - (l - xÃÖ) |
| B. | y = L/2 + (l - xÃÖ) |
| C. | y = L/2 - (l + xÃÖ) |
| D. | y = L/2 - (l - xÃÖ) |
| Answer» E. | |
| 191. |
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» E. | |
| 192. |
Long and short spans of a two way slab are ly and lx and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. According to Rankine Grashoff theory |
| A. | (wx/wy) = (ly/lx) |
| B. | (wx/wy) = (ly/lx)² |
| C. | (wx/wy) = (ly/lx)‚Å¥ |
| D. | None of these |
| Answer» D. None of these | |
| 193. |
In the zone of R.C.C. beam where shear stress is less than 5 kg/cm², nominal reinforcement is provided at a pitch of# |
| A. | One-half lever arm of the section |
| B. | One-third lever arm of the section |
| C. | Lever arm of the section |
| D. | One and half lever arm of the section |
| Answer» D. One and half lever arm of the section | |
| 194. |
The weight of reinforced concrete, is generally taken as |
| A. | 2200 kg/m³ |
| B. | 2300 kg/m³ |
| C. | 2400 kg/m³ |
| D. | 2500 kg/m³ |
| Answer» E. | |
| 195. |
Based on punching shear consideration, the overall depth of a combined footing under a column A, is |
| A. | (Area of the column A √ó Safe punching stress)/Load on column A |
| B. | (Perimeter of column A √ó Safe punching stress)/(Load on column A + Upward pressure √ó Area of the column) |
| C. | (Perimeter of column A √ó Safe punching stress)/(Load on column A √ó Upward pressure √ó Area of the column) |
| D. | None of these |
| Answer» C. (Perimeter of column A ‚àö√≥ Safe punching stress)/(Load on column A ‚àö√≥ Upward pressure ‚àö√≥ Area of the column) | |
| 196. |
If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is: |
| A. | (1 - C) mf - eE |
| B. | (C - 1) mf + eE |
| C. | (C - 1) mf - eE |
| D. | (1 - C) mf + eE |
| Answer» C. (C - 1) mf - eE | |
| 197. |
If p₁ and p₂ are mutually perpendicular principal stresses acting on a soil mass, the normal stress on any plane inclined at angle θ° to the principal plane carrying the principal stress p₁, is:# |
| A. | [(p₁ - p₂)/2] + [(p₁ + p₂)/2] sin 2θ |
| B. | [(p₁ - p₂)/2] + [(p₁ + p₂)/2] cos 2θ |
| C. | [(p₁ + p₂)/2] + [(p₁ - p₂)/2] cos 2θ |
| D. | [(p₁ + p₂)/2] + [(p₁ - p₂)/2] sin 2θ |
| Answer» D. [(p‚Äö√á√Ö + p‚Äö√á√á)/2] + [(p‚Äö√á√Ö - p‚Äö√á√á)/2] sin 2≈í‚àè | |
| 198. |
If p‚ÇÅ and p‚ÇÇ are effective lateral loadings at the bottom and top exerted by a level earth subjected to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is# |
| A. | [(p‚ÇÅ - p‚ÇÇ)/2] h |
| B. | [(p‚ÇÅ + p‚ÇÇ)/4] h |
| C. | [(p‚ÇÅ + p‚ÇÇ)/2] h |
| D. | (p‚ÇÅ - p‚ÇÇ) ‚Öîh |
| Answer» D. (p‚Äö√á√Ö - p‚Äö√á√á) ‚Äö√ñ√Æh | |
| 199. |
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 |
| Answer» E. | |
| 200. |
If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the pre-stressed beam is L, the upward uniform pressure will be |
| A. | 8hp/l |
| B. | 8hp/l² |
| C. | 8hl/p |
| D. | 8hl/p² |
| Answer» C. 8hl/p | |