civil engineering MCQs – Page 280

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 Review each marked answer and report any item that may be outdated or unclear.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
5581. Pick up the correct statement from the following?
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A. The pitch of a close coil spring, is very small

B. A wire wound in spiral form, is called a helical spring

C. All the above

D. The angle made by the coil with horizontal, is called the angle of helix

5582. The general expression for the B.M. of a beam of length l is the beam carries M = (wl/2) x (wx/2)_______________?
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A. A load varying linearly from zero at one end to w at the other end

B. An isolated load at mid span

C. A uniformly distributed load w/unit length

D. None of these

5583. The locus of reaction of a two hinged semi-circular arch, is_________________?
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A. Straight line

B. Parabola

C. Hyperbola

D. Circle

5584. A shaft rotating N.R.M. under a torque T, transmits a power_______________?
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A. /60 Newton metres/sec

B. /30 Newton metres/sec

C. /60 Newton metres/min

D. /30 Newton metres/min

5585. Maximum strain theory for the failure of a material at the elastic limit, is known as_______________?
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A. Rankines theory

B. Guests or Trecas theory

C. Haigs theory

D. St. Venants theory
5586. inertia of a rectangular section of width and depth about an axis passing The moment of through C.G. and parallel to its width is_______________?
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A. BD3/12

B. BD/6

C. BD3/6

D. BD/6

5587. The ratio of lateral strain to axial strain of a homogeneous material, is known___________________?
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A. Poissons ratio

B. Plastic ratio

C. Hookes ratio

D. Yield ratio

5588. The locus of the moment of inertia about inclined axes to the principal axis, is______________?
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A. Ellipse

B. Parabola

C. Circle

D. Straight line

5589. Co-efficient of wind resistance of a circular surface, is________________?
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A. 2-Jan

B. 2-Mar

C. 3-Jan

D. 2/3
5590. To determine the force in BD of the truss shown in the given figure a section is passed through BD, CD and CE, and the moments are taken about________________?
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A. C joint

B. A joint

C. D joint

D. B joint

5591. For determining the force in the member AB of the truss shown in the given figure by method of sections, the section is made to pass through AB, AD and ED and the moments are taken about___________________?
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A. Joint B

B. Joint C

C. Joint A

D. Joint D
5592. The maximum deflection due to a uniformly distributed load w/unit length over entire span of a cantilever of length l and of flexural rigidly EI, is_________________?
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A. wl3/3EI

B. wl4/12EI

C. wl4/8EI

D. wl4/3EI

5593. A two hinged parabolic arch of span l and rise h carries a load varying from zero at the left end to________________?
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A. /8h

B. /4h thrust is

C. /12h

D. /16h
5594. A square column carries a load P at the centroid of one of the quarters of the square. If a is the side of the main square, the combined bending stress will be________________?
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A. p/a

B. 3p/a

C. 2p/a

D. 4p/a

5595. The shape factor of standard rolled beam section varies from_______________?
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A. 1.30 to 1.40

B. 1.20 to 1.30

C. 1.40 to 1.50

D. 1.10 to 1.20
5596. There are two hinged semicircular arches A, B and C of radii 5 m, 7.5 m and 10 m respectively and each carries a concentrated load W at their crowns. The horizontal thrust at their supports will be in the ratio of_______________?
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A. 2 : 1 : 1

B. None of these

C. 1 : 1 : 2

D. 1 : 1 : 2

5597. For calculating the permissible stress 0 y /[(1 + a(l/r)] is the empirical formula, known as__________________?
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A. Parabolic formula

B. Rankines formula

C. Perrys formula

D. Straight line formula

5598. A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm2, the bending strain energy stored in the bar, is___________________?
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A. 711 N mm

B. 411 N mm

C. 611 N mm

D. 511 N mm=

5599. The moment of inertia of a circular section about any diameter D, is______________?
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A. 4/64

B. /64

C. Mar-64

D. Apr-32

5600. For the close coil helical spring of the maximum deflection is__________________?
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A. WD3n/d4N

B. 8WD3n/d4N

C. 2WD3n/d4N

D. 4WD3n/d4N