civil engineering MCQs – Page 231

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs
4601. 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

4602. 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

4603. 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

4604. 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

4605. 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

4606. 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

4607. 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
4608. 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

4609. 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

4610. 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
4611. 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

4612. 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

4613. 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

4614. 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

4615. 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
4616. 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
4617. 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

4618. 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

4619. 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
4620. 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