civil engineering MCQs – Page 233

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 Review each marked answer and report any item that may be outdated or unclear.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

4641. 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_______________?
0

A. 21.5 kg/cm 2

B. 11.4 kg/cm2

C. 8.3 kg/cm2

D. 7.6 kg/cm2

4642. Based on punching shear consideration, the overall depth of a combined footing under a column A, is_______________?
0

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

4643. The effective span of a simply supported slab, is_______________?
0

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

4644. Design of R.C.C. cantilever beams, is based on the resultant force at______________?
0

A. Mid span and fixed support

B. Free end

C. Mid span

D. Fixed end

4645. 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_________________?
0

A. W P

B. W 2P

C. W P

D. W 2P

4646. If the permissible compressive stress for a concrete in bending is C kg/m2, the modular ratio is_____________?
0

A. 2300/2C

B. 2800/C

C. 2800/C2

D. 2800/3C

4647. If is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is________________?
0

A. 0.7 H

B. 0.4 H

C. 0.5 H

D. 0.3 H

4648. 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__________________?
0

A. 48 d

B. 28 d

C. 38 d

D. 58 d

4649. In a beam the local bond stress Sb, is equal to_______________?
0

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)

4650. If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by_________________?
0

A. 0.5

B. 0.4

C. 0.2

D. 0.3

4651. A foundation is called shallow if its depth, is________________?
0

A. Equal to its width

B. One-fourth of its width

C. Half of its width

D. Three-fourth of its width

4652. 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_______________?
0

A. 54.5

B. 53.5

C. 51.5

D. 52.5

4653. The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is_________________?
0

A. 35

B. 25

C. 40

D. 30

4654. The design of a retaining wall assumes that the retained earth________________?
0

A. Is dry

4655. On an absolutely rigid foundation base, the pressure will________________?
0

A. Be zero at the centre of the foundation

B. Be uniform

C. Be more at the edges of the foundation

D. Not be uniform

4656. If Sb, is the average bond stress on a bar of diameter subjected to maximum stress , the length of the embedment is given by_____________?
0

A. l = dt/3Sb

B. l = dt/2Sb

C. l = dt/Sb

D. l = dt/4Sb

4657. Piles are usually driven by________________?
0

A. Diesel operated hammer

B. Single acting steam hammer

C. Drop hammer

D. All the above

4658. If T and R are tread and rise respectively of a stair, then_______________?
0

A. R + 2 T = 60

B. 2R + T = 60

C. R + 2 T = 30

D. 2R + T = 30

4659. To ensure that the hogging bending moment at two points of suspension of a pile of length L equals the sagging moment at its centre, the distances of the points of suspension from either end, is________________?
0

A. 0.207 L

B. 0.407 L

C. 0.107 L

D. 0.307 L

4660. 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________________?
0

A. WL/3P

B. WL /P

C. WL/2P

D. WL/4P

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