Exam Test Questions on Water Supply Engineering - Set 21 - ObjectiveBooks

Exam Test Questions on Water Supply Engineering - Set 21

Practice Test: Question Set - 21

1. Higher yield may be expected from
    (A) Gravity springs
    (B) Surface springs
    (C) Artesian springs
    (D) All the above

2. Before constructing a dam, the factor to be considered for controlling sedimentation, is
    (A) Selection of dam site
    (B) Construction of check dams
    (C) Providing vegetation screens
    (D) All the above

3. Chlorination of water does not remove
    (A) Ammonia content
    (B) B.O.D.
    (C) Organic matter content
    (D) Dissolved oxygen

4. While selecting the location of an intake for collecting surface water, the factor considered, is
    (A) The intake point should be near as far as possible to the treatment plant
    (B) The intake point should be in purer zone of the water source
    (C) The intake point in meandering rivers should be on concave banks
    (D) All the above

5. The diameter of pipes in bath rooms and lavatories in domestic water supply, is
    (A) 6 mm
    (B) 12 mm
    (C) 18 mm
    (D) 24 mm

6. Non-pathogenic bacterias cause the following water borne disease,
    (A) Cholera
    (B) Typhoid
    (C) Infections hepatitis
    (D) None of these

7. Underground water is obtained from
    (A) Rains
    (B) Rivers
    (C) Lakes
    (D) Springs

8. The ensure proper growth of children's teeth, the quantity of fluoride used in water mains, is
    (A) 1 mg/liter
    (B) 2 mg/liter
    (C) 3 mg/liter
    (D) 5 mg/liter

9. For a city developed haphazardly, the layout of distribution pipes preferred to, is
    (A) Ring system
    (B) Radial system
    (C) Grid iron system
    (D) Dead end system

10. Slow sand filter is used if maximum turbidity of raw water is less than
    (A) 10 gm/liter
    (B) 20 gm/liter
    (C) 30 gm/liter
    (D) 50 gm/liter

11. Raw water treated with only chlorine, is known as
    (A) Plain chlorination
    (B) Pre-chlorination
    (C) First-chlorination
    (D) De-chlorination

12. Total flow in stream is known
    (A) Run off
    (B) Stream flow
    (C) Discharge
    (D) All the above

13. Asbestos pipes are joined by means of
    (A) Flanged joint
    (B) Flexible joint
    (C) Dresser coupling joint
    (D) Simplex joint

14. For estimating the run off of catchments, the mean value of the constant 'K' in the Khosla's formula Qy = Py - K (1.8 Ty + 32) is
    (A) 1.21
    (B) 1.23
    (C) 1.25
    (D) 1.27

15. The valve fitted closely in a recess against an opening in a pipe, is generally
    (A) Wedge shaped circular disc
    (B) Spherical disc
    (C) Parallelepiped disc
    (D) Conical shaped circular disc

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