civil engineering MCQs – Page 37

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 Review each marked answer and report any item that may be outdated or unclear.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
721. 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________________?
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A. D = 0.0775 aP

B. D = 0.775 Pa

C. D = 0.07775 aP

D. D = 0.00775 aP
722. Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made by_________________?
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A. Marcus formula

B. Grashoff formula

C. Rankine Grashoff formula

D. Rankine formula

723. 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. 11.4 kg/cm2

B. 21.5 kg/cm 2

C. 8.3 kg/cm2

D. 7.6 kg/cm2

724. Piles are usually driven by________________?
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A. Single acting steam hammer

B. All the above

C. Diesel operated hammer

D. Drop hammer

725. The unit of force in S.I. units is_________________?
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A. newton

B. joule

C. dyne

D. kilogram

E. watt

726. The minimum cube strength of concrete used for a pre-stressed member, is________________?
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A. 50 kg/cm2

B. 150 kg/cm 2

C. 350 kg/cm2

D. 250 kg/cm2

727. A force acting on a body may_______________?
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A. introduce internal stresses

B. retard its motion

C. all of the above

D. change its motion

E. balance the other forces acting on it

728. If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by_________________?
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A. 0.5

B. 0.2

C. 0.4

D. 0.3

729. Which of the following is not the unit of power ?
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A. kW (kilowatt)

B. kcal/sec

C. kcal/kg sec

D. hp (horse power)

E. kg m/sec

730. 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 m

B. 8 cm

C. 6 m

D. 10 m

731. Angle oT friction is the___________________?
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A. ratio of limiting friction and normal reaction

B. ratio of static and dynamic friction

C. the ratio of minimum friction force to friction force acting when the body is in motion

D. angle between normal reaction and the resultant of normal reaction and the limiting friction

E. the ratio of minimum friction force to the friction force acting when the body is just about to move

732. 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. Coincides the geometrical centre of the beam

D. Remains below the slab

733. on a circular slab of radius , the maximum radial moment at the centre of the If is the load slab, is WR/16_____________?
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A. 2WR/16

B. 5WR/16

C. t; NON OF THESE

D. 3WR/16
734. As per I.S. 456 1978, the pH value of water shall be_______________?
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A. Equal to 7

B. Not less than 6

C. Less than 6

D. Equal to 6

735. To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than________________?
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A. b/5

B. b/6

C. b/4

D. b/3

736. The unit of power in S.I. units is______________?
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A. kilogram meter/sec

B. watt

C. pascal per sec

D. newton meter

E. joule

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

B. 1.25 times the average

C. 1.75 times the average

D. 1.50 times the average
738. 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. 0.5 H

B. 0.4 H

C. 0.7 H

D. 0.3 H

739. Post tensioning system_______________?
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A. Is not economical and hence not generally used

B. None of these

C. Is economical for large spans and is adopted now a days

D. Was widely used in earlier days

740. The diameter of transverse reinforcement of columns should be equal to one-fourth of the diameter of the main steel rods but not less than________________?
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A. 6 mm

B. 5 mm

C. 4 mm

D. 7 mm