Civil Engineering MCQ on Water Supply - Set 14 - ObjectiveBooks

Civil Engineering MCQ on Water Supply - Set 14

Practice Test: Question Set - 14

1. Bacterias which can survive with or without free oxygen, are known
    (A) Aerobic bacterias
    (B) Anaerobic bacterias
    (C) Facultative bacterias
    (D) None of these

2. The standard B.O.D. at 20°C, is taken for the consumption in
    (A) 2 days
    (B) 3 days
    (C) 4 days
    (D) 5 days

3. Distribution of wash water is provided in
    (A) Sedimentation tank
    (B) Slow sand filter
    (C) Rapid gravity filter
    (D) All the above

4. If P is population of a city in thousands and Q is fire demand in liters per minute, for proper estimate of water, the Empirical formula Q = 1135 [(P/5) + 10] is suggested by
    (A) National Board of fire under-writers
    (B) Freeman
    (C) Kuichling
    (D) None of these

5. During treatment of water, sedimentation is done
    (A) Before filtration
    (B) After filtration
    (C) Simultaneously with filtration
    (D) Along with chlorination

6. The ratio of the maximum daily consumption to the average daily demand, is
    (A) 1.0
    (B) 1.2
    (C) 1.4
    (D) 1.8

7. Alkalinity in water may be caused due to
    (A) Calcium and magnesium bicarbonates
    (B) Sodium carbonate
    (C) Potassium carbonate
    (D) All the above

8. The main draw-back of centrifugal pump, is
    (A) Necessity of priming
    (B) Discharge from pump varies with the load of water
    (C) For high heads, efficiency is low up to 50%
    (D) All the above

9. The factor to be considered for the source of city water supply, is
    (A) Quantity and quality of the available water
    (B) Elevation of the source of water
    (C) General terrain intervening the area
    (D) All the above

10. From the surface of reservoir, evaporation may be minimized by sprinkling
    (A) Spirit
    (B) Hydrochloric acid
    (C) Acetyl alcohol
    (D) Methane

11. 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

12. For plain chlorination of water, the quantity of chlorine used, is
    (A) 0.1 mg/liter
    (B) 0.2 mg/liter
    (C) 0.3 mg/liter
    (D) 0.5 mg/liter

13. In distribution pipes, air valves are provided at
    (A) Lower points
    (B) Junction points
    (C) Higher points
    (D) Anywhere

14. 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

15. The valves provided at low points of pipes to drain off water quickly under gravity, are called
    (A) Blow off valves
    (B) Drain valves
    (C) Sewer valves
    (D) All the above

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