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Civil Engineering Quiz | Practice MCQ #mcq.imBooz

December 12, 2019 by Dr. IM Leave a Comment

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1 >>Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be ?

  • (A) nil
  • (B) 5
  • (C) 10
  • (D) 15

2 >>Acidity in water is caused due to ?

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  • (A) Mineral acids
  • (B) Free CO2
  • (C) Iron sulphate
  • (D) All the above

3 >>The transitional middle portion of a logistic curve follows ?

  • (A) a geometric growth
  • (B) a logarithmic growth
  • (C) a first over curve
  • (D) a constant rate

4 >>The velocity of flow does not depend on ?

  • (A) grade of sewer
  • (B) length of sewer
  • (C) hydraulic mean depth of sewer
  • (D) roughness of sewer

Civil Engineering Quiz  | Civil Engineering MCQ

5 >>Pick up the correct statement from the following : ?

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  • (A) Lead and barium salts have toxic effect
  • (B) Arsenic and selenium are poisonous to human health
  • (C) Higher copper content affects the lungs
  • (D) All the above

6 >>The specific retention is least in case of ?

  • (A) Clay
  • (B) Sand
  • (C) Silt
  • (D) Coarse gravel

7 >>Most commonly used pump for lifting water in water supply mains, is ?

  • (A) axialflow pump
  • (B) reciprocating pump
  • (C) rotary type pump
  • (D) centrifugal pumps

8 >>Economic height of a dam is the height corresponding to which ?

  • (A) cost of the dam per unit of storage is minimum
  • (B) amount of silting is less
  • (C) cost of dam per unit storage is maximum
  • (D) free board provided is least

9 >>Distribution mains of any water supply, is normally designed for its average daily requirement ?

  • (A) 1
  • (B) 1.5
  • (C) 2
  • (D) 225%.

10 >>If pH value of water is ?

  • (A) 7 water it is said to be neutral
  • (B) less than 7 it is said to be acidic
  • (C) more than 7 it is said to be alkaline
  • (D) all the above

11 >>In pressure supply mains, water hammer pressure is reduced by providing ?

  • (A) sluice valves
  • (B) air valves
  • (C) pressure relief valves
  • (D) none of the these

12 >>Water supply system includes ?

  • (A) digging a well for water
  • (B) construction of dams
  • (C) construction of canals
  • (D) entire arrangement from source to distribution

13 >>Corrosion of a pipe ?

  • (A) reduces its life span
  • (B) reduces its carrying capacity
  • (C) adds colour to water
  • (D) all the above

14 >>Pick up the correct statement from the following : ?

  • (A) Detention period for plain sedimentation tanks ranges between 4 to 8 hours
  • (B) Detention period for sedimentation tanks, using coagulants usually ranges between 2 to 4 hours
  • (C) The horizontally flow velocity in sedimentation tanks, is generally limited to 0.3 m/minute
  • (D) All the above

15 >>The maximum permissible nitrites in public water supplies, is ?

  • (A) Nil
  • (B) 0.5 P.P.M.
  • (C) 1.0. P.P.M.
  • (D) 1.5 P.P.M

16 >>A high velocity of wash water is required for ?

  • (A) rapid gravity filter with strainers
  • (B) rapid gravity filter without strainers
  • (C) slow sand filter with strainers
  • (D) slow sand filter without strainers

17 >>In distribution pipes, drain valves are provided at ?

  • (A) lower point
  • (B) higher point
  • (C) junction points
  • (D) any where

18 >>Corrosion of well pipes may not be reduced by ?

  • (A) reducing the draw down and the pumping rate
  • (B) reducing the flow velocity
  • (C) using thicker pipes
  • (D) using screens having larger area of openings

19 >>Manholes along the mains from the source to a city are provided at 500 m intervals in ?

  • (A) steel pipes
  • (B) R.C.C. pipes
  • (C) hume steel pipes
  • (D) all the above

20 >>The population growth curve is ?

  • (A) Sshaped curve
  • (B) parabolic curve
  • (C) circular curve
  • (D) straight line

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