civil engineering MCQs – Page 261

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 Review each marked answer and report any item that may be outdated or unclear.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
5201. When the bolts are subjected to reversal of stresses, the most suitable type of bolt is________________?
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A. ordinary unfinished bolt

B. turned and fitted bolt

C. black bolt

D. high strength bolt
5202. Pitch of tacking rivets, when double angles connected back to back and acting as tension members should not be more than_________________?
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A. 300 mm

B. 1000 mm

C. 600 mm

D. 500 mm

5203. According to IS:800, in the Merchant Rankine formula the value of imperfection index (n) is_______________?
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A. 1.4

B. 1.8

C. 2

D. 1

5204. The bracing between two columns of a steel tank will be designed to resist_________________?
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A. column loads + full horizontal shear due to wind or earthquake

B. horizontal shear due to wind or earthquake only

C. horizontal, shear due to wind or earthquake + 2.5% of column loads

D. column loads + 2.5% of horizontal shear due to wind or earthquake

5205. The least dimension in case of a circular column of diameter D is taken as_______________?
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A. 0.5 D

B. 0.88 D

C. 0.68 D

D. D

5206. Angle of inclination of the lacing bar with the longitudinal axis of the column should preferably be between____________________?
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A. 10 to 30

B. 40 to 70

C. 90

D. 30 to 40

5207. The number of seismic zones in which the country has been divided are_________________?
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A. 6

B. 5

C. 3

D. 7

5208. For a compression member with double angle section, which of the following section will give larger value of minimum radius of gyration?
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A. equal angles back to back

B. unqual legged angles with long legs back to back

C. unequal legged angles with short legs back to back

D. both (B) or (C)

5209. The risk coefficient k, depends on__________________?
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A. mean probable design life of structures

B. basic wind speed

C. both (A) and (B)

D. none of the above

5210. As per IS : 800, for compression flange, the outstand of flange plates should not exceed________________?
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A. 201

B. 121

C. 251

D. 161
5211. The effect of racking forces is considered in the design of_________________?
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A. lateral braces

B. correct answer is</strong>

C. chord members

5212. The sway bracing is designed to transfer____________________?
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A. 25% of the top panel wind load to bottom bracing

B. 2Vi % of the top panel wind load to bottom bracing

C. 50% of the top panel wind load to bottom bracing

D. 10% of the top panel wind load to bottom bracing

5213. Shear buckling of web in a plate girder is prevented by using________________?
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A. none of the above

B. vertical intermediate stiffener

C. horizontal stiffener at neutral axis

D. bearing stiffener

5214. Hudsons formula gives the dead weight of a truss bridge as a function of_________________?
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A. heaviest axle load of engine

B. top chord area

C. bottom chord area

D. effective span of bridge

5215. The effective length of a battened column is increased by_________________?
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A. 5%

B. 10%

C. 15%

D. 20%

5216. In case of timber structures, the simple bending formula M = fz may be applied for________________?
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A. solid circular beams only

B. all rectangular beams

C. all square cross-section beams

D. rectangular beams up to 300 mm depth
5217. The range of economical spacing of trusses varies from________________?
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A. L/3 to L/5

B. 2L/5 to 3L/5 where L is span

C. L/3 to L/2

D. L/4to2L/5

5218. As per IS:800, in the plastic design, which of the following pairs are correctly matched? Working Loads Load factor________________?
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A. ) Dead Load + imposed load 1.7

B. i) Dead load + load due to wind or 1.3 seismic forces

C. ) Dead load + imposed load + load 1.7</strong>

D. Dead load 1.7
5219. Which of the following sections should preferably be used at places where torsion occurs ?
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A. any of the above

B. angle section

C. channel section

D. box type section
5220. Generally the purlins are placed at the panel points so as to avoid__________________?
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A. bending moment in rafter

B. shear force in rafter

C. axial force in rafter

D. deflection of rafter