Water supply Engineering Mock test – 3 || Civil Engineering Mock test Welcome to your Water supply Engineering Mock test - 3 Take an exciting test in Water supply Engineering You have only 20 mins to complete the test (25 Questions) Wish you all the best!!! Name Email 1. For maximum alkalinity of water, pH value should be A. zero B. less than 7 C. more than 7 D. 142. 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. 1.273. The four major water supply distribution systems, are A. dead end, tree, grid iron and reticulation B. dead end, tree, grid iron and circular C. tree, grid iron, ring and radial D. tree, reticulation, circular and ring.4. The lowest outlet sluice in a dam is provided A. below the dead storage B. on the top level of dead storage C. on the top level of useful storage D. at the centre of the dam.5. In pumping stations, the type of joint generally used, is A. socket and spigot joint B. flanged joint C. expansion joint D. dresser coupling joint6. The ratio of maximum hourly consumption and average hourly consumption of the maximum day, is A. 1.2 B. 1.5 C. 1.8 D. 2.4 E. 2.77. Most commonly used section in grade aqueducts, is A. circular B. rectangular C. parabolic D. horse shoe section.8. The prescribed hardness limit of potable water ranges between A. 50 to 75 P.P.M. B. 75 to 115 P.P.M. C. 100 to 150 P.P.M. D. 150 to 200 P.P.M.9. High pH value of water does not produce A. incrustation B. sediment deposits C. turberculation D. corrosion E. both (c) and (d).10. The depth of the water table at a place is 45 m below the general ground level. To lift water from a deep tube well in such a locality, the type of pump to be installed is A. Centrifugal pump B. Reciprocating pump C. Deep well turbine pump D. None of these.11. Pick up the incorrect statement from the following : A. Free surface ground water is subjected to atmospheric pressure B. Water table surface rises and falls with seasons C. Depth of water table is directly proportional to the rate of drawal of water D. Level of water table remains stationary12. The efficiency of sedimentation tank does not depend upon A. depth of tank B. length of tank C. detention period D. velocity of water.13. The maximum permitted loss of head in a rapid sand filter, is A. 1 m B. 2 m C. 3 m D. 4 m14. Standard process of chlorination of water, is done by A. plain chlorination B. pre-chlorination C. post-chlorination D. double chlorination.15. The permissible pH value for public water supplies may range between A. 4.5 to 5.5 B. 5.5 to 6.5 C. 6.5 to 8.5 D. 8.5 to 10.516. The strainer type tube well, is unsuitable for A. coarse gravels B. fine sandy strata C. clean gravels D. none of these.17. Specific capacity or yield of wells, is generally expressed, as A. m3 per sec B. m3/hour C. m3/hour/m2 D. m3/hour/m2/m18. To detect the turbidity of the order of 0 to 1000 P.P.M. the instrument used is A. turbidimeter B. Jackson turbidimeter C. Baylis turbidimeter D. Hallige turbidimeter.19. The detention period for plain sedimentation water tanks, is usually A. 4 to 8 hours B. 8 to 16 hours C. 16 to 24 hours D. 24 to 36 hours.20. The bacterias which require free oxygen for their survival, are called A. Aerobic bacterias B. Anaerobic bacterias C. Faculative bacteria D. None of these.21. For plain chlorination of water, the quantity of chlorine used, is A. 0.1 mg/litre B. 0.2 mg/litre C. 0.3 mg/litre D. 0.4 mg/litre E. 0.5 mg/litre22. Critical time for developing a water hammer, is the time required for A. closing the valve B. the wave to travel from valve to the reservoir C. the wave to travel from the valve to the reservoir and back D. none of these.23. The fire demand for a city of 50, 000 population, according to Godrich formula, is A. 40 mld B. 42 mld C. 44 mld D. 48 mld.24. Most important source of water for public water supply, is from A. lakes B. ponds C. streams D. rivers25. Service connections to consumers houses, are generally provided with A. copper pipes B. hume pipes C. galvanised iron pipes D. P.V.C. pipes