MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 260 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The type of joint generally used in cast iron pipes, is |
| A. | th full |
| B. | full |
| C. | th full. |
| D. | socket and spigot joint |
| Answer» E. | |
| 2. |
Sluice valves in main water supplies |
| A. | 30 ppm |
| B. | 45 ppm. |
| C. | are used to regulate the flow of water in pipes |
| D. | are spaced about 5 km apart |
| Answer» E. | |
| 3. |
Most important source of water for public water supply, is from |
| A. | lakes |
| B. | ponds |
| C. | streams |
| D. | rivers |
| Answer» E. | |
| 4. |
B.O.D. of treated water should be |
| A. | Coarse gravel. |
| B. | 10 ppm |
| C. | 25 ppm |
| D. | 20 ppm |
| Answer» E. | |
| 5. |
Water supply includes |
| A. | none of these. |
| B. | collection, transportation and treatment of water |
| C. | distribution of water to consumers |
| D. | provision of hydrants for fire fighting |
| Answer» E. | |
| 6. |
The population of a city in 2000 is 50,000. The average increase in population over last 8 decades is 7500 and average incremental increase during 8 decades is 750. The population of the city based on incremental method, in the year 2020 will be |
| A. | 100 m |
| B. | 125 m. |
| C. | 55000 |
| D. | 60500 |
| Answer» D. 60500 | |
| 7. |
The ratio of maximum hourly consumption and average hourly consumption of the maximum day, is |
| A. | none of these. |
| B. | 1.2 |
| C. | 1.5 |
| D. | 1.8 |
| Answer» E. | |
| 8. |
For least effect on the water table, the tube wells must be dug one in every |
| A. | syphons |
| B. | flumes. |
| C. | 0.5 sq km |
| D. | 0.75 sq km |
| Answer» E. | |
| 9. |
Cast iron pipes |
| A. | 0.8 |
| B. | 90%. |
| C. | are widely used in city water supplies |
| D. | resist corrosion satisfactorily |
| Answer» E. | |
| 10. |
Rapid gravity filters |
| A. | filtration |
| B. | sedimentation. |
| C. | were developed by G.W. Fullar |
| D. | make use of coarser sand with effective size as 0.5 mm |
| Answer» E. | |
| 11. |
The factor for the selection of pumping station site, is |
| A. | 30 mm. |
| B. | distance of the source of contamination or pollution |
| C. | height above the H.F.L. of the river |
| D. | future expansion |
| Answer» E. | |
| 12. |
The factor affecting per capita demand, is |
| A. | size of the city |
| B. | climatic conditions |
| C. | pressure in water mains |
| D. | cost of water |
| Answer» E. | |
| 13. |
Q is the discharge from an unconfined tube well with depression head s through its pipe of radius rw. If the radius of influence is R, the length of the required strainer, is |
| A. | calcium nitrate |
| B. | calcium bicarbonate |
| C. | none of these. |
| Answer» D. | |
| 14. |
In a reservoir the average volume of sediment deposition is 0.15 million cubic per year. If the dead storage and total capacity of the reservoir are 8 million cubic metres and 36 million cubic metres respectively, |
| A. | |
| B. | the reservoir will theoretically be silted in 240 years |
| C. | the reservoir will start reducing after 60 years |
| Answer» D. | |
| 15. |
Open channels supported over tres-les, are generally known as |
| A. | calcium hydroxide |
| B. | all the above. |
| C. | raised canals |
| D. | acqueducts |
| Answer» E. | |
| 16. |
Hardness of water is caused due to |
| A. | rain. |
| B. | calcium sulphate |
| C. | magnesium sulphate |
| D. | calcium nitrates |
| Answer» E. | |
| 17. |
An area is declared drought affected if its mean rainfall is less than |
| A. | all the above. |
| B. | 0.5 |
| C. | 0.6 |
| D. | 0.75 |
| Answer» E. | |
| 18. |
Well treated water is generally supplied for |
| A. | domestic use |
| B. | commercial use |
| C. | public use |
| D. | waste water |
| Answer» E. | |
| 19. |
The strainer type tube well, is unsuitable for |
| A. | 8.5 to 10.5 |
| B. | none of these. |
| C. | coarse gravels |
| D. | fine sandy strata |
| Answer» C. coarse gravels | |
| 20. |
Total flow in stream is known |
| A. | run off |
| B. | stream flow |
| C. | discharge |
| D. | all the above. |
| Answer» E. | |
| 21. |
The discharge for the confined tube well is obtained from |
| A. | Thiem's formula |
| B. | Darcy's formula |
| C. | Tolman's formula |
| D. | Dupuits formula. |
| Answer» E. | |
| 22. |
Continuous flow of water can be expected from |
| A. | all the above. |
| B. | gravity springs |
| C. | surface springs |
| D. | artesian springs |
| Answer» D. artesian springs | |
| 23. |
The process of passing water through beds of granular materials, is called |
| A. | providing under-sluices in the dam |
| B. | All the above. |
| C. | screening |
| D. | sedimentation |
| Answer» D. sedimentation | |
| 24. |
While designing a water supply of an industrial township, industrial and commercial water demand of total supply, is assumed |
| A. | All the above. |
| B. | 0.1 |
| C. | 10 to 15% |
| D. | 15 to 20% |
| Answer» E. | |
| 25. |
For centrifugal pumps |
| A. | 150 to 200 P.P.M. |
| B. | none of these. |
| C. | initial cost is low |
| D. | limited space is required |
| Answer» E. | |
| 26. |
The maximum pressure which the pipe can withstand without any leakage during hydrostatic pressure test, is called |
| A. | neither (a) nor (b). |
| B. | Working pressure |
| C. | Design pressure |
| D. | Test pressure |
| Answer» D. Test pressure | |
| 27. |
Aeration of water is done to remove |
| A. | All the above. |
| B. | odour |
| C. | colour |
| D. | bacterias |
| Answer» B. odour | |
| 28. |
Pick up the correct statement from the following regarding radial flow centrifugal pumps : |
| A. | none of these. |
| B. | These are provided with volute type or turbine type casings |
| C. | In involute type of radial flow centrifugal pump, the impeller discharges into a gradually expanding spiral casing |
| D. | In turbine type of radial flow centrifugal pumps, the impeller is surrounded by stationary guide vanes to reduce the velocity of water |
| Answer» E. | |
| 29. |
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. |
| Answer» D. none of these. | |
| 30. |
The main disadvantage of hard water, is |
| A. | greater soap consumption |
| B. | scaling of boilers |
| C. | corrosion and incrustation of pipes |
| D. | making food tasteless |
| Answer» E. | |
| 31. |
The duration of contact of chlorine with water before it is served to the first consumer, should be at least |
| A. | both (a) and (c) of above. |
| B. | 10 to 15 minutes |
| C. | 15 to 20 minutes |
| D. | 20 to 30 minutes |
| Answer» D. 20 to 30 minutes | |
| 32. |
Estimates of a water supply project depends upon the rate of water supply per capita consumption and probable population estimated at the end of the design period of |
| A. | none of these. |
| B. | 5 to 10 years |
| C. | 10 to 15 years |
| D. | 15 to 20 years |
| Answer» E. | |
| 33. |
The ratio of discharge and plan area of a continuous flow type settling tank, is known |
| A. | 1.8 |
| B. | surface loading |
| C. | overflow |
| D. | overflow rate |
| Answer» E. | |
| 34. |
Maximum threshold number permitted for indicating the odour of public water supplies, is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 35. |
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. |
| Answer» B. 0.5 P.P.M. | |
| 36. |
Sunlight |
| A. | helps growth of bacterias |
| B. | impedes growth of algae |
| C. | increases dissolved oxygen content |
| D. | reduces turbidity. |
| Answer» C. increases dissolved oxygen content | |
| 37. |
The maximum depth of sedimentation tanks is limited to |
| A. | all the above. |
| B. | 2 m |
| C. | 3 m |
| D. | 4 m |
| Answer» E. | |
| 38. |
Run off is the quantity of water which flows |
| A. | in sewer pipes |
| B. | due to leakage in pipes |
| C. | in rivers |
| D. | none of these. |
| Answer» D. none of these. | |
| 39. |
Water is distributed to consumers by gravitational system, in |
| A. | Dehradun |
| B. | Bombay |
| C. | Delhi |
| D. | Calcutta |
| Answer» E. | |
| 40. |
Distribution of wash water is provided in |
| A. | sedimentation tank |
| B. | slow sand filter |
| C. | rapid gravity filter |
| D. | all the above. |
| Answer» D. all the above. | |
| 41. |
Dissolved carbon dioxide, can be removed from the supply main by |
| A. | sedimentation |
| B. | aeration |
| C. | chlorination |
| D. | coagulation |
| Answer» C. chlorination | |
| 42. |
For the prediction of future population of a city, the factor to be considered, is |
| A. | births |
| B. | deaths |
| C. | migrants |
| D. | all the above. |
| Answer» E. | |
| 43. |
Plain chlorination is used for water |
| A. | with turbidities less than 20 mg/litre |
| B. | obtained from clear lakes |
| C. | consumed during emergencies |
| D. | supplies to armies during war |
| Answer» E. | |
| 44. |
The equation in which Q is yearly run off in cm, P is yearly total rainfall in cm, H is difference of R.L.s. of lowest and highest points and A is area of catchment in square metres, is known as |
| A. | English formula |
| B. | Khosla's formula |
| C. | Justin's formula |
| D. | Vermule's formula. |
| Answer» D. Vermule's formula. | |
| 45. |
The temporary hardness of water can be removed by |
| A. | boiling |
| B. | adding lime |
| C. | adding alum |
| D. | filtration |
| Answer» B. adding lime | |
| 46. |
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. |
| Answer» E. | |
| 47. |
Recuperation test is carried out to determine |
| A. | turbidity of water |
| B. | pH value of water |
| C. | yield of well |
| D. | discharge from a well. |
| Answer» D. discharge from a well. | |
| 48. |
Gravity conduits are generally in the form of |
| A. | canals |
| B. | flumes |
| C. | aqueduct |
| D. | tunnels |
| Answer» E. | |
| 49. |
The joint used for joining the plain ends of cast iron pipes, is |
| A. | flanged joint |
| B. | socket and spigot joint . |
| C. | dresser coupling joint |
| D. | flexible joint |
| Answer» D. flexible joint | |
| 50. |
Sluice valves are fitted in a distribution system |
| A. | along straight length of pipes at suitable intervals |
| B. | at the junctions of the pipes |
| C. | at the branching off points of sub-mains |
| D. | all the above. |
| Answer» E. | |