civil engineering Mcqs
4601. Pick up the true statement from the following?
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A. In the absence of beams, it is easier to install piping

B. All the above

C. In the absence of beams, it is easier to paint

D. Plain ceiling provides the best property diffusing light

4602. For normal cases, stiffness of a simply supported beam is satisfied if the ratio of its span to its overall depth does not exceed________________?
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A. 10

B. 20

C. 15

D. 25

4603. The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or____________________?
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A. 18 bar diameters

B. 24 bar diameters

C. 12 bar diameters

D. 30 bar diameters

4604. The maximum shear stress (q) in concrete of a reinforced cement concrete beam is_____________?
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A. Width/(Lever arm Shear force)

B. Lever arm/(Shear force Width)

C. Shear force/(Lever arm Width)

D. (Shear force Width)/Lever arm

4605. The maximum shear stress (qmax) in a rectangular beam is_______________?
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A. 2.0 times the average

B. 1.75 times the average

C. 1.50 times the average

D. 1.25 times the average

4606. For the design of a simply supported T-beam the ratio of the effective span to the overall depth of the beam is limited to______________?
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A. 15

B. 10

C. 20

D. 25

4607. In a singly reinforced beam____________?
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A. Steel possesses initial stresses when embedded in concrete

B. Plane sections transverse to the centre line of the beam before bending remain plane after bending

C. Compression is borne entirely by concrete

D. Elastic moduli for concrete and steel have different values within the limits of deformation of the beam

4608. In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength______________?
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A. 200 kg/cm2

B. 300 kg/cm2

C. 100 kg/cm2

D. 400 kg/cm2
4609. 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_________________?
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A. 30 cm

B. 35 cm

C. 25 cm

D. 20 cm

4610. Distribution reinforcement in a simply supported slab, is provided to distribute_______________?
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A. Load

B. Temperature stress

C. All the above

D. Shrinkage stress

4611. 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__________________?
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A. 1/16th of the span

B. 1/10th of the span

C. 1/8th of the span

D. 1/12th of the span
4612. A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis______________?
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A. Remains within the flange

B. None of these

C. Remains below the slab

D. Coincides the geometrical centre of the beam

4613. For a number of columns constructed in a rcjw, the type of foundation provided, is_______________?
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A. Strip

B. Raft

C. Footing

D. Strap

4614. The length of the straight portion of a bar beyond the end of the hook, should be at least_______________?
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A. Seven times the diameter

B. Twice the diameter

C. Thrice the diameter

D. Four times the diameter

4615. If the depth of actual neutral axis of a doubly reinforced beam______________?
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A. All the above

B. Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier

C. Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier

D. Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously

4616. An under-reinforced section means_________________?
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A. Steel provided is insufficient

B. Steel is provided at the underside only

C. Steel provided on one face only

D. Steel will yield first
4617. The steel generally used in R.C.C. work, is_________________?
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A. Stainless

B. High tension steel

C. High carbon steel

D. Mild steel
4618. In a combined footing if shear stress does not exceed 5 kg/cm2, the nominal stirrups provided are________________?
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A. 6 legged

B. 8 legged

C. 12 legged

D. 10 legged

4619. The minimum number of main steel bars provided in R.C.C________________?
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A. All the above

B. Circular columns is 6

C. Rectangular columns is 4

D. Octagonal columns is 8

4620. A short column 20 cm 20 cm in section is reinforced with 4 bars whose area of cross section is 20 sq. cm. If permissible compressive stresses in concrete and steel are 40 kg/cm2 and 300 kg/cm2, the Safe load on the column, should not exceed_______________?
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A. 4120 kg

B. 412,000 kg

C. None of these

D. 41,200 kg
4621. According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is_____________?
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A. 10 kg/cm 2

B. 20 kg/cm2

C. 5 kg/cm2

D. 15 kg/cm2

4622. Pick up the assumption for the design of a pre-stressed concrete member from the following_______________?
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A. All the above

B. Variation of stress in reinforcement due to changes in external loading is negligible

C. A transverse plane section remains a plane after bending

D. During deformation limits, Hooks law is equally applicable to concrete as well as to steel

4623. Steel beam theory is used for_______________?
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A. Beams if shear exceeds 4 times allowable shear stress

B. Design of simple steel beams

C. Doubly reinforced beams ignoring compressive stress in concrete

D. Steel beams encased in concrete

4624. The angle of repose of a soil is the maximum angle which the outer face of the soil mass makes_______________?
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A. With the vertical

B. With the horizontal

C. With the perpendicular to the inclined plane of the soil

D. None of these

4625. An R.C.C. column is treated as short column if its slenderness ratio is less than_______________?
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A. 40

B. 30

C. 50

D. 35

4626. 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________________?
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A. 8 cm

B. 6 m

C. 10 m

D. 8 m
4627. The width of the flange of a T-beam should be less than_________________?
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A. Least of the above

B. One- third of the effective span of the T -beam

C. Breadth of the rib plus twelve times the thickness of the slab

D. Distance between the centres of T-beam

4628. The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as________________?
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A. Lee-McCall system

B. Freyssinet system

C. Magnel-Blaton system

D. C.C.L. standard system

4629. A ribbed slab is provided for______________?
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A. A plain ceiling

B. Acoustic insulation

C. Thermal insulation

D. All the above
4630. Pick up the incorrect statement from the following?
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A. In the stem of a retaining wall, reinforcement is provided near the earth side

B. None of these

C. In the toe slab of a retaining wall, reinforcement is provided at the bottom of the slab

D. In the heel slab of a retaining wall, reinforcement is provided at the top of the slab

4631. In a singly reinforced beam, the effective depth is measured from its compression edge to_________________?
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A. Tensile edge

B. Tensile reinforcement

C. Longitudinal central axis

D. Neutral axis of the beam

4632. 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________________?
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A. 150 cm

B. 50 cm

C. 200 cm

D. 100 cm

4633. The angle of internal friction of soil mass is the angle whose_______________?
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A. Sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

B. None of these

C. Cosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane

D. Tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane
4634. The diameter of longitudinal bars of a column should never be less than_____________?
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A. 12 mm

B. 8 mm

C. 10 mm

D. 6 mm

4635. As the percentage of steel increases________________?
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A. Lever arm increases

B. Depth of neutral axis decreases

C. Depth of neutral axis increases

D. Lever arm decreases

4636. The thickness of base slab of a retaining wall generally provided, is_____________?
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A. Width of the stem at the bottom

B. One -third of the width of the stem at the bottom

C. One fourth of the width of the steam at the bottom

D. One half of the width of the stem at the bottom

4637. In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at
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A. More loaded column

B. A point of the maximum shear force

C. A point of zero shear force

D. Less loaded column

4638. The maximum area of tension reinforcement in beams shall not exceed_______________?
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A. 4 %

B. 1.50%

C. 1%

D. 0.15%

4639. The weight of reinforced concrete, is generally taken as______________?
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A. 2200 kg/m3

B. 2400 kg/m3

C. 2300 kg/m3

D. 2500 kg/m3

4640. The minimum cube strength of concrete used for a pre-stressed member, is________________?
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A. 150 kg/cm 2

B. 50 kg/cm2

C. 350 kg/cm2

D. 250 kg/cm2

4641. An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is__________________?
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A. 176 cm

B. 300 cm

C. 236 cm

D. 233 cm

4642. 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_______________?
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A. 21.5 kg/cm 2

B. 11.4 kg/cm2

C. 8.3 kg/cm2

D. 7.6 kg/cm2

4643. Based on punching shear consideration, the overall depth of a combined footing under a column A, is_______________?
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A. None of these

B. (Perimeter of column A Safe punching stress)/(Load on column A Upward pressure Area of the column)

C. (Perimeter of column A Safe punching stress)/(Load on column A + Upward pressure Area of the column)

D. (Area of the column A Safe punching stress)/Load on column A

4644. The effective span of a simply supported slab, is_______________?
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A. Distance between the centres of the bearings

B. Clear span plus effective depth of the slab

C. None of these

D. Clear distance between the inner faces of the walls plus twice the thickness of the wall
4645. Design of R.C.C. cantilever beams, is based on the resultant force at______________?
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A. Mid span and fixed support

B. Free end

C. Mid span

D. Fixed end
4646. 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_________________?
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A. W P

B. W 2P

C. W P

D. W 2P

4647. If the permissible compressive stress for a concrete in bending is C kg/m2, the modular ratio is_____________?
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A. 2300/2C

B. 2800/C

C. 2800/C2

D. 2800/3C
4648. If is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is________________?
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A. 0.7 H

B. 0.4 H

C. 0.5 H

D. 0.3 H

4649. 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__________________?
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A. 48 d

B. 28 d

C. 38 d

D. 58 d
4650. In a beam the local bond stress Sb, is equal to_______________?
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A. Leaver arm/(Shear force Total perimeter of reinforcement)

B. Shear force/(Leaver arm Total perimeter of reinforcement)

C. Leaver arm/(Bending moment Total perimeter of reinforcement)

D. Total perimeter of reinforcement/(Leaver arm Shear force)