civil engineering MCQs – Page 259

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 Review each marked answer and report any item that may be outdated or unclear.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
5161. At the junction of sewers___________________?
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A. Top of smaller sewer is kept lower

B. Top of larger sewer is kept lower

C. Tops of both the sewers are at the same level

D. None of these
5162. Pick up the correct statement from the following?
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A. The boning rod is used for checking the levels of the sewer inverts

B. A manhole is classified as shallow manhole if its depth is less than 0.9 m

C. All the above

D. Manhole covers are made circular for the convenience of the cleaning staff

5163. In sewers the velocity of flow should not be_________________?
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A. Less than 10 m/sec

B. More than 20 m/sec

C. Less than the self-cleansing velocity

D. More than the self-cleansing velocity

5164. By providing sufficient edge distance, which of the following failures of riveted joint can be avoided ?
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A. shear failure of the rivet

B. shear failure of the plate

C. tension failure of the plate

D. crushing failure of the rivet

5165. Rivets connecting flange angles to cover plates in a plate girder are subjected to_________________?
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A. horizontal shear only

B. vertical load only

C. both (A. and (B.

D. none of the above

5166. The moment of inertia of the pair of vertical stiffeners about the center line of the web should not be less than__________________?
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A. 1.5d/C2

B. 1.5dV/C

C. 1.5dY/C3

D. 1.5d/C

5167. Maximum pitch of rivets, used in steel stacks, is limited to_______________?
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A. re t is thickness of thinner plate being connected

B. 161

C. 121

D. 101

E. 6t

5168. Which of the following types of riveted joint is free from bending stresses ?
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A. lap joint

B. none of the above

C. butt joint with single cover plate

D. butt joint with double cover plates
5169. The mechanism method of plastic analysis satisfies___________________?
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A. equilibrium condition only

B. equilibrium and mechanism conditions

C. equilibrium and plastic moment conditions

D. mechanism and plastic moment conditions

5170. Normally, the angle of roof truss with asbestos sheets should not be less than_______________?
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A. 40

B. 30

C. 35

D. 26/2

5171. According to IS Specifications, the effective length of a column effectively held in position at both ends and restrained in direction at one end is taken as________________?
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A. 0.67 L

B. 0.8 L

C. L

D. 1.5 L

5172. A circular column section is generally not used in actual practice because________________?
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A. it is difficult to connect beams to the round sections

B. all of the above

C. it cannot carry the load safely

D. it is uneconomical

5173. The best arrangement to provide unified behaviour in built up steel columns is by______________?
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A. tie plates

B. lacing

C. perforated cover plates

D. battening

5174. If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per Unwins formula will be__________________?
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A. 27 mm

B. 20 mm

C. 24 mm

D. 16 mm

5175. The allowable shear stress in the web of mild steel beams decreases with__________________?
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A. decrease in h/t ratio

B. re h is height and t is thickness

C. increase in h/t ratio

D. increase in height

E. decrease in thickness

5176. Shape factor is a property which depends________________?
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A. only on the ultimate stress of the material

B. only on the yield stress of the material

C. only on the geometry of the section

D. both on the yield stress and ultimate stress of material

5177. The internal pressure coefficient on walls for buildings with large permeability is taken as_______________?
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A. 0.5

B. 0

C. 0.7

D. 0.2

5178. The effective length of a fillet weld should not be less than___________________?
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A. six times the weld size

B. two times the weld size

C. four times the weld size

D. weld size

5179. If the thickness of thinnest outside plate is 10 mm, then the maximum pitch of rivets in tension will be taken as______________?
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A. 120 mm

B. 160 mm

C. 200 mm

D. 300 mm

5180. The use of tie plates in laced columns is_________________?
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A. not prohibited

B. prohibited

C. permitted at start and end of lacing system only

D. permitted between two parts of the lacing