civil engineering MCQs – Page 211

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 Review each marked answer and report any item that may be outdated or unclear.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

4201. Which of the following canal structures is used to remove surplus water from an irrigation channel into a natural drain ?
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A. canal fall

B. canal regulator

C. canal escape

D. canal outlet

4202. Vertical drop fall is satisfactory for a height upto ___________?
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A. 0.5 m

B. 5.0 m

C. 3.5 m

D. 1.5 m

4203. River training for depth is achieved by_______________?
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A. groynes

B. construction of dykes or leavees

C. both (A) and (B)

D. groynes and bandalling

4204. As per Laceys theory, the silt factor is_________________?
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A. inversely proportional to average particle size

B. not related to average particle size

C. directly proportional to average particle size

D. directly proportional to square root of average particle size

4205. The ratio of rate of change of the discharge of an outlet to the rate of change of the discharge of distributing channel is called________________?
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A. proportionality

B. flexibility

C. sensitivity

D. setting

4206. The area between the isohyets 45 cm and 55 cm is 100 square km and between 55 cm and 65 cm is 150 square km. The average depth of annua! precipitation over the above basin of 250 square km will be__________________?
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A. 60 cm

B. 55 cm

C. 56 cm

D. 50 cm

4207. The value of Sodium Absorption Ratio for high sodium water lies between________________?
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A. 26 to 34

B. 10 to 18

C. 0 to 10

D. 18 to 26

4208. For wave action in dams, the maximum height of freeboard is generally taken to be equal to_______________?
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A. 0.5 hw

B. 0.75 hw

C. 1.25 hw

D. 1.50 hw

4209. S-hydrograph is used to obtain unit hydrograph of________________?
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A. shorter duration from longer duration

B. longer duration from shorter duration

C. both (A) and (B)

D. none of the above

4210. A multipurpose reservoir is the one which is_________________?
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A. designed for one purpose but serves more than one purpose

B. planned and constructed to serve various purposes

C. both (A. and (B.

D. none of the above

4211. The flow-mass curve is graphical representation of__________________?
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A. cumulative discharge and time

B. discharge and time in chronological order

C. discharge and percentage probability of flow being equaled or exceeded

D. cumulative discharge, volume and time in chronological order

4212. The water stored in the reservoir below the minimum pool level is called_______________?
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A. valley storage

B. dead storage

C. useful storage

D. surcharge storage

4213. Seepage through foundation in an earthen dam is controlled by providing___________________?
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A. horizontal blanket

B. impervious cut off

C. rock toe

D. chimney drain

4214. As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at_____________?
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A. same level

B. higher level

C. lower level

D. any of the above depending on the design

4215. The maximum average depth due to one day storm over an area of 100 km2 is 100 mm. Depth-Area-Duration (DAD. curves indicate that for the same area of 100 km2 the maximum average depth for a 3 hour storm will be__________________?
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A. none of the above

B. more than 100 mm

C. 100 mm

D. less than 100 mm

4216. According to Khoslas theory, the exit gradient in the absence of a downstream cutoff is_____________?
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A. very large

B. unity

C. infinity

D. 0

4217. The sensitivity of a rigid module is_______________?
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A. 1

B. zero

C. infinity

D. between zero and one

4218. The unit hydrograph due to a storm may be obtained by dividing the ordinates of the direct runoff hydrograph by_______________?
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A. period of storm

B. direct runoff volume

C. total rainfall

D. none of the above

4219. Which of the following is a non-recording raingauge ?
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A. Stevens weighing type raingauge

B. tipping bucket type raingauge

C. floating type raingauge

D. Simons raingauge

4220. The meander pattern of a river is developed by_________________?
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A. average discharge

B. maximum discharge

C. dominant discharge

D. critical discharge

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