MCQOPTIONS
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MCQOPTIONS
This section includes 430 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than |
| A. | 8 bar diameters |
| B. | 4 bar diameters |
| C. | 0 bar diameters |
| D. | 6 bar diameters |
| Answer» D. 6 bar diameters | |
| 352. |
According to load factor method, the permissible load ‘W’ on a short column reinforced with longitudinal bars and lateral stirrups, is |
| A. | tress in concrete × area of concrete |
| B. | tress in steel × area of steel |
| C. | tress in concrete × area of concrete + Stress in steel × area of steel |
| D. | one of these |
| Answer» D. one of these | |
| 353. |
The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously, is called |
| A. | alanced section |
| B. | conomic section |
| C. | ritical section |
| D. | ll the above |
| Answer» E. | |
| 354. |
As per IS : 1343, total shrinkage for a pre-tensioned beam, is |
| A. | .0 × 10⁻² |
| B. | .0 × 10⁻³ |
| C. | .0 × 10⁻⁵ |
| D. | .5 × 10⁻⁵ |
| Answer» E. | |
| 355. |
If d is the diameter of a bar, ft is allowable tensile stress and fb, is allowable bond stress, the bond length is given by |
| A. | t .d/4fb |
| B. | π/4). (ft .d/fb) |
| C. | ft .d²/fb |
| D. | π/4). (ft .d3/fb) |
| Answer» B. π/4). (ft .d/fb) | |
| 356. |
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 ‘x’ from either end where, ‘x’ is |
| A. | 0 cm |
| B. | 00 cm |
| C. | 50 cm |
| D. | 00 cm |
| Answer» D. 00 cm | |
| 357. |
If W is the load on a circular slab of radius R, the maximum circumferential moment at the centre of the slab, is |
| A. | R²/16 |
| B. | WR²/16 |
| C. | WR²/16 |
| D. | ero |
| Answer» D. ero | |
| 358. |
If ‘W’ is the load on a circular slab of radius ‘R’, the maximum radial moment at the centre of the slab, is |
| A. | R²/16 |
| B. | WR²/16 |
| C. | WR²/16 |
| D. | WR²/16 |
| Answer» D. WR²/16 | |
| 359. |
The system in which high tensile alloy steel bars (silica manganese steel) are used as pre-stressing tendons, is known as |
| A. | reyssinet system |
| B. | agnel-Blaton system |
| C. | .C.L. standard system |
| D. | ee-McCall system |
| Answer» E. | |
| 360. |
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. | ne-half lever arm of the section |
| B. | ne-third lever arm of the section |
| C. | ever arm of the section |
| D. | ne and half lever arm of the section |
| Answer» D. ne and half lever arm of the section | |
| 361. |
If p₁ and p₂ 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. | (p₁ - p₂)/2] h |
| B. | (p₁ + p₂)/4] h |
| C. | (p₁ + p₂)/2] h |
| D. | p₁ - p₂) ⅔h |
| Answer» D. p₁ - p₂) ⅔h | |
| 362. |
If P kg/m² is the upward pressure on the slab of a plain concrete footing whose projection on either side of the wall is a cm, the depth of foundation D is given by |
| A. | = 0.00775 aP |
| B. | = 0.0775 aP |
| C. | = 0.07775 aP |
| D. | = 0.775 Pa |
| Answer» B. = 0.0775 aP | |
| 363. |
‘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. | = (P/'- (Z/M) |
| B. | = (A/P) - (M/Z) |
| C. | = (P/A) - (M/Z) |
| D. | = (P/A) - (M/6Z) |
| Answer» D. = (P/A) - (M/6Z) | |
| 364. |
If the bearing capacity of soil is 10 tonnes/cm² and the projection of plain concrete footing from walls, is a cm, the depth D of footing is |
| A. | = 0.0775 a |
| B. | = 0.775 a |
| C. | = 0.775 √a |
| D. | = 0.775 a² |
| Answer» C. = 0.775 √a | |
| 365. |
An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encased with the floor of a hall 12 meters by 7 meters, is spaced at 3 meters from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is |
| A. | 00 cm |
| B. | 33 cm |
| C. | 76 cm |
| D. | 36 cm |
| Answer» D. 36 cm | |
| 366. |
If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight 'w' per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is |
| A. | = (W/Aw) [(1 - sin φ)/(1 + sin φ)] |
| B. | = (W/Aw) [(1 + sin φ)/(1 + sin φ)] |
| C. | = (W/Aw) [(1 - sin φ)/(1 + sin φ)]² |
| D. | = √(W/Aw) [(1 - sin φ)/(1 + sin φ)]² |
| Answer» D. = √(W/Aw) [(1 - sin φ)/(1 + sin φ)]² | |
| 367. |
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. | cm |
| B. | 0 cm |
| C. | 5 cm |
| D. | 0 cm |
| Answer» C. 5 cm | |
| 368. |
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. | L/12 (L - 2D/3)² |
| B. | L/10 (L + 2D/3)² |
| C. | L/10 (L - 2D/3)² |
| D. | L/12 (L - D/3)² |
| Answer» D. L/12 (L - D/3)² | |
| 369. |
A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm² steel. If the modular ratio (m) is 15, the depth of the neutral axis, is |
| A. | 0 cm |
| B. | 5 cm |
| C. | 0 cm |
| D. | 5 cm |
| Answer» D. 5 cm | |
| 370. |
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. | L/P |
| B. | L/2P |
| C. | L/3P |
| D. | L/4P |
| Answer» E. | |
| 371. |
If the permissible compressive stress for a concrete in bending is C kg/m², the modular ratio is |
| A. | 800/C |
| B. | 300/2C |
| C. | 800/3C |
| D. | 800/C² |
| Answer» D. 800/C² | |
| 372. |
A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is |
| A. | L/P |
| B. | L/2P |
| C. | L/3P |
| D. | L/4P |
| Answer» D. L/4P | |
| 373. |
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. | s safe in shear |
| B. | s safe with stirrups |
| C. | s safe with stirrups and inclined bars |
| D. | eeds revision of section |
| Answer» E. | |
| 374. |
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. | s increased by PZ/e |
| B. | s increased by Pe/Z |
| C. | s decreased by Pe/Z |
| D. | emains unchanged |
| Answer» D. emains unchanged | |
| 375. |
The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width of the stem at the bottom, is |
| A. | 1.5 |
| B. | 2.5 |
| C. | 3.5 |
| D. | 4.5 |
| Answer» D. 4.5 | |
| 376. |
If ‘W’ is the uniformly distributed load on a circular slab of radius ‘R’ fixed at its ends, the maximum positive radial moment at its centre, is |
| A. | WR²/16 |
| B. | WR²/16 |
| C. | R²/16 |
| D. | one of these |
| Answer» D. one of these | |
| 377. |
If ‘H’ is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is |
| A. | .3 H |
| B. | .4 H |
| C. | .5 H |
| D. | .7 H |
| Answer» E. | |
| 378. |
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. (p₁ + p₂)/2] + [(p₁ - p₂)/2] sin 2θ | |
| 379. |
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. | |
| 380. |
If ‘W’ is weight of a retaining wall and ‘P’ is the horizontal earth pressure, the factor of safety against sliding, is |
| A. | 0 |
| B. | 0.25 |
| C. | 0.5 |
| D. | 0 |
| Answer» D. 0 | |
| 381. |
The amount of reinforcement for main bars in a slab, is based upon |
| A. | inimum bending moment |
| B. | aximum bending moment |
| C. | aximum shear force |
| D. | inimum shear force |
| Answer» C. aximum shear force | |
| 382. |
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. | s safe in shear |
| B. | s unsafe in shear |
| C. | s over safe in shear |
| D. | eeds redesigning |
| Answer» C. s over safe in shear | |
| 383. |
If L is the effective span of a R.C.C. beam which is subjected to maximum shear qmax at the ends, the distance from either end over which stirrups for the shear, are provided, is |
| A. | L/2) (1 - 3/qmax) |
| B. | L/3) (1 - 5/qmax) |
| C. | L/2) (1 - 5/qmax) |
| D. | L/2) (1 - 2/qmax) |
| Answer» D. L/2) (1 - 2/qmax) | |
| 384. |
For initial estimate for a beam design, the width is assumed |
| A. | 1/15th of span |
| B. | 1/20th of span |
| C. | 1/25th of span |
| D. | 1/30th of span |
| Answer» E. | |
| 385. |
The minimum head room over a stair must be |
| A. | 200 cm |
| B. | 205 cm |
| C. | 210 cm |
| D. | 230 cm |
| Answer» D. 230 cm | |
| 386. |
A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is |
| A. | WL/P |
| B. | WL/2P |
| C. | WL/3P |
| D. | WL/4P |
| Answer» D. WL/4P | |
| 387. |
Side face reinforcement shall be provided in the beam when depth of the web in a beam exceeds |
| A. | 50 cm |
| B. | 75 cm |
| C. | 100 cm |
| D. | 120 cm |
| Answer» C. 100 cm | |
| 388. |
Thickened part of a flat slab over its supporting column, is technically known as |
| A. | Drop panel |
| B. | Capital |
| C. | Column head |
| D. | None of these |
| Answer» B. Capital | |
| 389. |
Enlarged head of a supporting column of a flat slab is technically known as |
| A. | Supporting end of the column |
| B. | Top of the column |
| C. | Capital |
| D. | Drop panel |
| Answer» D. Drop panel | |
| 390. |
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 | |
| 391. |
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 % | |
| 392. |
High strength concrete is used in pre-stressed member |
| A. | To overcome high bearing stresses developed at the ends |
| B. | To overcome bursting stresses at the ends |
| C. | To provide high bond stresses |
| D. | All the above |
| Answer» E. | |
| 393. |
The pitch of the main bars in a simply supported slab, should not exceed its effective depth by |
| A. | Three times |
| B. | Four times |
| C. | Five times |
| D. | Six times |
| Answer» E. | |
| 394. |
The transverse reinforcements provided at right angles to the main reinforcement |
| A. | Distribute the load |
| B. | Resist the temperature stresses |
| C. | Resist the shrinkage stress |
| D. | All the above |
| Answer» E. | |
| 395. |
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 | |
| 396. |
In a simply supported slab, alternate bars are curtailed at |
| A. | 1/4th of the span |
| B. | 1/5th of the span |
| C. | 1/6th of the span |
| D. | 1/7th of the span |
| Answer» E. | |
| 397. |
After pre-stressing process is completed, a loss of stress is due to |
| A. | Shrinkage of concrete |
| B. | Elastic shortening of concrete |
| C. | Creep of concrete |
| D. | All the above |
| Answer» E. | |
| 398. |
If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from walls, is a cm, the depth D of footing is |
| A. | D = 0.0775 a |
| B. | D = 0.775 a |
| C. | D = 0.775 a |
| D. | D = 0.775 a2 |
| Answer» C. D = 0.775 a | |
| 399. |
The self-weight of the footing, is |
| A. | Not considered for calculating the upward pressure on footing |
| B. | Also considered for calculating the upward pressure on footing |
| C. | Not considered for calculating the area of the footing |
| D. | Both (b) and (c) |
| Answer» B. Also considered for calculating the upward pressure on footing | |
| 400. |
The spacing of transverse reinforcement of column is decided by the following consideration. |
| A. | The least lateral dimension of the column |
| B. | Sixteen times the diameter of the smallest longitudinal reinforcing rods in the column |
| C. | Forty-eight times the diameter of transverse reinforcement |
| D. | All the above |
| Answer» E. | |