MCQOPTIONS
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MCQOPTIONS
This section includes 167 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. |
Assertion A: The consumption of water increases with increase in the distribution pressure.Reason R: Higher distribution pressure causes more loss and waste of waterSelect your answer according to the coding system given below%! |
| A. | Both A and R is true and R is the correct explanation of A |
| B. | Both A and R is true but R is not the correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» B. Both A and R is true but R is not the correct explanation of A | |
| 2. |
The suitable layout of a distribution system for irregularly growing town is%! |
| A. | Dead end system |
| B. | Grid iron system |
| C. | Radial system |
| D. | Ring system |
| Answer» B. Grid iron system | |
| 3. |
The commonly used material for water supply pipes, which has the properties of being strong, not easily corroded and long life but is heavy and brittle, is%! |
| A. | Steel |
| B. | Cast iron |
| C. | Copper |
| D. | Reinforced cement concrete |
| Answer» C. Copper | |
| 4. |
Double filtration is used%! |
| A. | To increase the filtration slow sand filters capacity of |
| B. | To increase the filtration rapid sand filters capacity of |
| C. | For isolated buildings like pools, hotels etc swimming |
| D. | All of the above |
| Answer» B. To increase the filtration rapid sand filters capacity of | |
| 5. |
The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of%! |
| A. | 1 mg/liter |
| B. | 10 mg/liter |
| C. | 100 mg/liter |
| D. | 1000 mg/liter |
| Answer» C. 100 mg/liter | |
| 6. |
The type of sewer which is suitable for both combined and separate system is%! |
| A. | Circular sewer |
| B. | Egg shaped sewer |
| C. | Horseshoe type sewer |
| D. | Semi-elliptical sewer |
| Answer» C. Horseshoe type sewer | |
| 7. |
Select the correct relationship between porosity (N), specific yield (y) and specific retention (R)%! |
| A. | N = y + R |
| B. | y = N + R |
| C. | R = N + y |
| D. | R > (N + y) |
| Answer» B. y = N + R | |
| 8. |
If the time of concentration is 9 minutes, then the intensity of rainfall according to British Ministry of Health formula will be%! |
| A. | 4 mm/hr |
| B. | 10 mm/hr |
| C. | 20 mm/hr |
| D. | 40 mm/hr |
| Answer» E. | |
| 9. |
The pathogens can be killed by%! |
| A. | Nitrification |
| B. | Chlorination |
| C. | Oxidation |
| D. | None of the above |
| Answer» C. Oxidation | |
| 10. |
Disinfection efficiency is%! |
| A. | Reduced at higher pH value of water |
| B. | Unaffected by pH value of water |
| C. | Increased at higher pH value of water |
| D. | Highest at pH value equal to 7 |
| Answer» B. Unaffected by pH value of water | |
| 11. |
Corrosion in concrete sewers is caused by%! |
| A. | Septic conditions |
| B. | Dissolved oxygen |
| C. | Chlorine |
| D. | Nitrogen |
| Answer» B. Dissolved oxygen | |
| 12. |
The disinfection efficiency of chlorine increases by (i) Decreasing the time of contact (ii) Decreasing the temperature of water (iii) Increasing the temperature of water%! |
| A. | Only (i) |
| B. | Both (i) and (ii) |
| C. | Both (i) and (iii) |
| D. | Only (iii) |
| Answer» E. | |
| 13. |
Most of the bacteria in sewage are%! |
| A. | Parasitic |
| B. | Saprophytic |
| C. | Pathogenic |
| D. | Anaerobic |
| Answer» C. Pathogenic | |
| 14. |
The depression of water table in a well due to pumping will be maximum(Where ‘R’ is the radius of influence)%! |
| A. | At a distance R from the well |
| B. | Close to the well |
| C. | At a distance R/2 from the well |
| D. | None of the above |
| Answer» C. At a distance R/2 from the well | |
| 15. |
Sewerage system is designed for%! |
| A. | Maximum flow only |
| B. | Minimum flow only |
| C. | Average flow only |
| D. | Maximum and minimum flow |
| Answer» E. | |
| 16. |
The settling velocity of a particle in a sedimentation tank depends on%! |
| A. | Depth of tank |
| B. | Surface area of tank |
| C. | Both depth and surface area of tank |
| D. | None of the above |
| Answer» C. Both depth and surface area of tank | |
| 17. |
The pipe which is used to carry the discharge from sanitary fittings like bath rooms, kitchens etc. is called%! |
| A. | Waste pipe |
| B. | Soil pipe |
| C. | Vent pipe |
| D. | Anti-siphonage pipe |
| Answer» B. Soil pipe | |
| 18. |
Standard BOD is measured at%! |
| A. | 20°C - 1 day |
| B. | 25°C - 3 day |
| C. | 20°C - 5 day |
| D. | 30°C - 5 day |
| Answer» D. 30¬¨‚àûC - 5 day | |
| 19. |
Which of the following compounds is widely used for algae control?%! |
| A. | Sodium sulphate |
| B. | Copper sulphate |
| C. | Sodium chloride |
| D. | Calcium chloride |
| Answer» C. Sodium chloride | |
| 20. |
*/*_Disinfection efficiency is? |
| A. | Reduced at higher pH value of water |
| B. | Unaffected by pH value of water |
| C. | Increased at higher pH value of water |
| D. | Highest at pH value equal to 7 |
| Answer» B. Unaffected by pH value of water | |
| 21. |
*/*_Corrosion in concrete sewers is caused by? |
| A. | Septic conditions |
| B. | Dissolved oxygen |
| C. | Chlorine |
| D. | Nitrogen |
| Answer» B. Dissolved oxygen | |
| 22. |
*/*_The self cleansing velocity for all sewers in India is usually? |
| A. | Less than 1.0 m/sec |
| B. | 1.0 m/sec to 1.2 m/sec |
| C. | 1.5 m/sec to 2.0 m/sec |
| D. | 3.0 m/sec to 3.5 m/sec |
| Answer» C. 1.5 m/sec to 2.0 m/sec | |
| 23. |
*/*_The pathogens can be killed by? |
| A. | Nitrification |
| B. | Chlorination |
| C. | Oxidation |
| D. | None of the above |
| Answer» C. Oxidation | |
| 24. |
*/*_In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be? |
| A. | 100 ppm |
| B. | 200 ppm |
| C. | 300 ppm |
| D. | 400 ppm |
| Answer» C. 300 ppm | |
| 25. |
*/*_Cleaning is done by (i) Scraping and removal in filters slow sand (ii) Back washing in slow sand filters (iii) Scraping and removal in filters rapid sand (iv) Back washing in rapid sand filtersThe correct answer is? |
| A. | (i) and (ii) |
| B. | (ii) and (iii) |
| C. | (i) and (iv) |
| D. | (ii) and (iv) |
| Answer» D. (ii) and (iv) | |
| 26. |
*/*_In facultative stabilization pond, the sewage is treated by? |
| A. | Aerobic bacteria only |
| B. | Algae only |
| C. | Dual action of aerobic bacteria and anaerobic bacteria |
| D. | Sedimentation |
| Answer» D. Sedimentation | |
| 27. |
*/*_Sewerage system is usually designed for? |
| A. | 10 years |
| B. | 25 years |
| C. | 50 years |
| D. | 75 years |
| Answer» C. 50 years | |
| 28. |
*/*_A sewer that receives the discharge of a number of house sewers is called? |
| A. | House sewer |
| B. | Lateral sewer |
| C. | Intercepting sewer |
| D. | Sub-main sewer |
| Answer» C. Intercepting sewer | |
| 29. |
*/*_Laying of sewers is usually done with the help of? |
| A. | A Theodolite |
| B. | A compass |
| C. | Sight rails and boning rods |
| D. | A plane table |
| Answer» D. A plane table | |
| 30. |
*/*_The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of? |
| A. | 1 mg/liter |
| B. | 10 mg/liter |
| C. | 100 mg/liter |
| D. | 1000 mg/liter |
| Answer» C. 100 mg/liter | |
| 31. |
*/*_Double filtration is used? |
| A. | To increase the filtration slow sand filters capacity of |
| B. | To increase the filtration rapid sand filters capacity of |
| C. | For isolated buildings like pools, hotels etc swimming |
| D. | All of the above |
| Answer» B. To increase the filtration rapid sand filters capacity of | |
| 32. |
*/*_If the time of concentration is 9 minutes, then the intensity of rainfall according to British Ministry of Health formula will be? |
| A. | 4 mm/hr |
| B. | 10 mm/hr |
| C. | 20 mm/hr |
| D. | 40 mm/hr |
| Answer» E. | |
| 33. |
*/*_Select the correct relationship between porosity (N), specific yield (y) and specific retention (R)? |
| A. | N = y + R |
| B. | y = N + R |
| C. | R = N + y |
| D. | R > (N + y) |
| Answer» B. y = N + R | |
| 34. |
*/*_The type of sewer which is suitable for both combined and separate system is? |
| A. | Circular sewer |
| B. | Egg shaped sewer |
| C. | Horseshoe type sewer |
| D. | Semi-elliptical sewer |
| Answer» C. Horseshoe type sewer | |
| 35. |
*/*_The water carriage system of collection of waste product? |
| A. | Is cheaper in initial cost than dry conservancy system |
| B. | Requires treatment before disposal |
| C. | Creates hygienic problem |
| D. | All of the above |
| Answer» C. Creates hygienic problem | |
| 36. |
*/*_The depression of water table in a well due to pumping will be maximum(Where ‘R’ is the radius of influence)? |
| A. | At a distance R from the well |
| B. | Close to the well |
| C. | At a distance R/2 from the well |
| D. | None of the above |
| Answer» C. At a distance R/2 from the well | |
| 37. |
*/*_The layout of distribution system in which water flows towards the outer periphery is? |
| A. | Ring system |
| B. | Dead end system |
| C. | Radial system |
| D. | Grid iron system |
| Answer» D. Grid iron system | |
| 38. |
*/*_The maximum discharge of a tube well is about? |
| A. | 5 liters/sec |
| B. | 50 liters/sec |
| C. | 500 liters/sec |
| D. | 1000 liters/sec |
| Answer» C. 500 liters/sec | |
| 39. |
*/*_The chemical most commonly used to increase speed of sedimentation of sewage is? |
| A. | Sulphuric acid |
| B. | Copper sulphate |
| C. | Lime |
| D. | Sodium permanganate |
| Answer» D. Sodium permanganate | |
| 40. |
*/*_The major disadvantage of lime soda process of water softening is that? |
| A. | It is unsuitable for turbid and acidic water |
| B. | Huge amount of precipitate is formed which creates a disposal problem |
| C. | The effluent cannot be reduced to zero hardness |
| D. | It is unsuitable for softening the water of excessive hardness |
| Answer» C. The effluent cannot be reduced to zero hardness | |
| 41. |
*/*_The detention period in coagulation tanks is usually kept as? |
| A. | 1 to 2 minutes |
| B. | 30 to 45 minutes |
| C. | 2 to 6 hours |
| D. | 2 to 6 days |
| Answer» D. 2 to 6 days | |
| 42. |
*/*_The settling velocity of a particle in a sedimentation tank depends on? |
| A. | Depth of tank |
| B. | Surface area of tank |
| C. | Both depth and surface area of tank |
| D. | None of the above |
| Answer» C. Both depth and surface area of tank | |
| 43. |
*/*_Sewerage system is designed for? |
| A. | Maximum flow only |
| B. | Minimum flow only |
| C. | Average flow only |
| D. | Maximum and minimum flow |
| Answer» E. | |
| 44. |
*/*_Standard BOD is measured at? |
| A. | 20°C - 1 day |
| B. | 25°C - 3 day |
| C. | 20°C - 5 day |
| D. | 30°C - 5 day |
| Answer» D. 30¬¨‚àûC - 5 day | |
| 45. |
*/*_The pipe which is used to carry the discharge from sanitary fittings like bath rooms, kitchens etc. is called? |
| A. | Waste pipe |
| B. | Soil pipe |
| C. | Vent pipe |
| D. | Anti-siphonage pipe |
| Answer» B. Soil pipe | |
| 46. |
*/*_The disinfection efficiency of chlorine increases by (i) Decreasing the time of contact (ii) Decreasing the temperature of water (iii) Increasing the temperature of water? |
| A. | Only (i) |
| B. | Both (i) and (ii) |
| C. | Both (i) and (iii) |
| D. | Only (iii) |
| Answer» E. | |
| 47. |
*/*_Which of the following compounds is widely used for algae control?? |
| A. | Sodium sulphate |
| B. | Copper sulphate |
| C. | Sodium chloride |
| D. | Calcium chloride |
| Answer» C. Sodium chloride | |
| 48. |
*/*_Most of the bacteria in sewage are? |
| A. | Parasitic |
| B. | Saprophytic |
| C. | Pathogenic |
| D. | Anaerobic |
| Answer» C. Pathogenic | |
| 49. |
*/*_Septic tank is a (i) Settling tank (ii) Digestion tank (iii) Aeration tank? |
| A. | Only (i) |
| B. | (i) and (ii) |
| C. | (i) and (iii) |
| D. | Only (iii) |
| Answer» C. (i) and (iii) | |
| 50. |
*/*_The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is? |
| A. | 1 ppm |
| B. | 4 ppm |
| C. | 10 ppm |
| D. | 40 ppm |
| Answer» C. 10 ppm | |