MCQOPTIONS
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MCQOPTIONS
This section includes 183 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following method is not used for treating crown corrosion? |
| A. | Full runs of sewer |
| B. | Increasing the sulfate content of sewage |
| C. | Aeration and chlorination of sewage |
| D. | Vitrified clay lining of sewer |
| Answer» C. Aeration and chlorination of sewage | |
| 2. |
The diameter of plain cement concrete pipes used for sewerage system is __________ |
| A. | 20mm |
| B. | 30mm |
| C. | 90mm |
| D. | 63mm |
| Answer» D. 63mm | |
| 3. |
The diameter of the sewer is 23cm. What should be the self cleansing velocity? |
| A. | 10cm/Sec |
| B. | 40cm/Sec |
| C. | 100cm/Sec |
| D. | 130cm/Sec |
| Answer» D. 130cm/Sec | |
| 4. |
The proportional perimeter of a circular sewer running partially half where K is the central angle subtended at a circular section of sewer is __________ |
| A. | K/360° |
| B. | K/90° |
| C. | K/270° |
| D. | K/180° |
| Answer» B. K/90° | |
| 5. |
Which of the following is incorrect regarding Egg shaped sewer? |
| A. | It is cheap |
| B. | It is difficult to construct |
| C. | It is less stable |
| D. | It is mainly circular in shape |
| Answer» B. It is difficult to construct | |
| 6. |
In which sewer joint, bituminous compounds are added? |
| A. | Collar joint |
| B. | Flexible joint |
| C. | Mechanical joint |
| D. | Simplex joint |
| Answer» C. Mechanical joint | |
| 7. |
Which of the following conduit material has the maximum Kutter’s coefficient in terms of good surface? |
| A. | Brick |
| B. | Salt glazed stoneware |
| C. | Cast iron |
| D. | Galvanized iron |
| Answer» B. Salt glazed stoneware | |
| 8. |
Which of the following is a disadvantage of asbestos cement sewer? |
| A. | They are light weight |
| B. | They can be easily jointed |
| C. | They are brittle |
| D. | Inside surface is smooth |
| Answer» D. Inside surface is smooth | |
| 9. |
The cement concrete sewers are lined with vitrified clay lining to prevent __________ |
| A. | Dampness of sewer |
| B. | Algae growth in the sewer |
| C. | Crown corrosion |
| D. | Foul smell of sewer |
| Answer» D. Foul smell of sewer | |
| 10. |
Which joint in the sewer is known as ring tie coupling? |
| A. | Bell and spigot joint |
| B. | Collar joint |
| C. | Mechanical joint |
| D. | Simplex joint |
| Answer» E. | |
| 11. |
Which type of sewer serves as an outlet for large territory? |
| A. | Lateral sewer |
| B. | Main sewer |
| C. | Branch sewer |
| D. | Separate sewer |
| Answer» C. Branch sewer | |
| 12. |
The self cleansing velocity required for coarse sand is __________ |
| A. | 10cm/Sec |
| B. | 20cm/Sec |
| C. | 30cm/Sec |
| D. | 40cm/Sec |
| Answer» C. 30cm/Sec | |
| 13. |
The lower portion of Egg shaped sewer is known as _____ |
| A. | Roof |
| B. | Invert |
| C. | Arch |
| D. | Wedge |
| Answer» C. Arch | |
| 14. |
Semi elliptical sections of sewer are not used nowadays. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 15. |
The flow of sewage in the sewers is independent of its slope and geometry. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 16. |
The ratio of the width of the standard section and new shaped section of Egg shaped section is __________ |
| A. | 1:2 |
| B. | 2:1 |
| C. | 1:1 |
| D. | 1:3 |
| Answer» D. 1:3 | |
| 17. |
The diameter of a circular sewer is 0.8m. The desired depth of flow is __________ |
| A. | 2/3 of the circular section of sewer |
| B. | 1/3 of the circular section of sewer |
| C. | 1/2 of the circular section of sewer |
| D. | 1/4 of the circular section of sewer |
| Answer» B. 1/3 of the circular section of sewer | |
| 18. |
The septic tank and pump chamber should be kept as deep as possible. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 19. |
Which sewer is used to carry the excess flow of existing sewer? |
| A. | Branch sewer |
| B. | Relief sewer |
| C. | Main sewer |
| D. | Lateral sewer |
| Answer» B. Relief sewer | |
| 20. |
The magnitude of hoop stress on sewer is given __________ |
| A. | PD/2t |
| B. | PD/t |
| C. | 2PD/t |
| D. | PD/2 |
| Answer» B. PD/t | |
| 21. |
How many types of underground sewer are there on the basis of construction conditions? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 22. |
The value of manning’s coefficient for cement concrete is ____________ |
| A. | 0.017 |
| B. | 0.13 |
| C. | 0.013 |
| D. | 0.17 |
| Answer» D. 0.17 | |
| 23. |
_______ denotes the characteristic size of circular cross section of sewer. |
| A. | DN |
| B. | MN |
| C. | QW |
| D. | SE |
| Answer» B. MN | |
| 24. |
Which of the following has a minimum manning’s coefficient in terms of fair interior surface? |
| A. | Plastic smooths |
| B. | Asbestos cement |
| C. | Brick |
| D. | Cement concrete |
| Answer» B. Asbestos cement | |
| 25. |
The design self cleansing velocity of an inverted siphon is __________ |
| A. | 0.9m/Sec |
| B. | 0.6m/Sec |
| C. | 0.7m/Sec |
| D. | 0.4m/Sec |
| Answer» B. 0.6m/Sec | |
| 26. |
Negative projecting condition is a type of ______ condition. |
| A. | Trench ditch |
| B. | Trench |
| C. | Tunnel |
| D. | Embankment |
| Answer» E. | |
| 27. |
_______ condition exists when the sewer is laid at a depth between 9m to 12m. |
| A. | Trench ditch |
| B. | Trench |
| C. | Tunnel |
| D. | Embankment |
| Answer» D. Embankment | |
| 28. |
Which of the following is not a sewer appurtenance? |
| A. | Storm regulator |
| B. | Flushing tank |
| C. | Water tank |
| D. | Manholes |
| Answer» D. Manholes | |
| 29. |
______ provides the working space for maintenance and inspection of sewers. |
| A. | Lamp holes |
| B. | Manholes |
| C. | Flushing tanks |
| D. | Working chamber |
| Answer» E. | |
| 30. |
Which of the following order is correct regarding coefficient of cohesion? |
| A. | Hard clay < Dense sand > Medium clay > Soft clay |
| B. | Hard clay > Dense sand > Medium clay > Soft clay |
| C. | Medium clay > Dense sand > Hard clay > Soft clay |
| D. | Dense sand > Medium clay > Hard clay > Soft clay |
| Answer» C. Medium clay > Dense sand > Hard clay > Soft clay | |
| 31. |
Which of the following has the minimum unit weight? |
| A. | Dry sand |
| B. | Wet sand |
| C. | Damp clay |
| D. | Ordinary sand |
| Answer» B. Wet sand | |
| 32. |
The type of soil is loose dry sand. What is the coefficient of cohesion of the soil? |
| A. | 100 |
| B. | 200 |
| C. | 500 |
| D. | 0 |
| Answer» E. | |
| 33. |
The thickness of the manhole frame is __________ |
| A. | 10cm |
| B. | 15cm |
| C. | 20cm |
| D. | 40cm |
| Answer» D. 40cm | |
| 34. |
The minimum diameter of the access shaft for a circular manhole is __________ |
| A. | 60cm |
| B. | 20cm |
| C. | 30cm |
| D. | 10cm |
| Answer» B. 20cm | |
| 35. |
If the depth of excavation is 4m. What is the thickness of the brick wall of manhole? |
| A. | 12cm |
| B. | 16cm |
| C. | 20cm |
| D. | 26cm |
| Answer» E. | |
| 36. |
The value of Kutter’s coefficient for cast iron is ____________ |
| A. | 0.02 |
| B. | 0.012 |
| C. | 0.12 |
| D. | 0.13 |
| Answer» C. 0.12 | |
| 37. |
_______ is used to remove the waste directly from the building. |
| A. | Branch sewer pipe |
| B. | Outfall sewer pipe |
| C. | Soil vent pipe |
| D. | Main sewer pipe |
| Answer» D. Main sewer pipe | |
| 38. |
Which sewer carries both sewage and storm water? |
| A. | Outfall sewer |
| B. | Separate sewer |
| C. | Main sewer |
| D. | Combined sewer |
| Answer» E. | |
| 39. |
There is less deposition of waste in ovoid cross-section. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 40. |
The storm frequency for a peripheral residential area is ___ a year. |
| A. | Once |
| B. | Twice |
| C. | Thrice |
| D. | 4 times |
| Answer» C. Thrice | |
| 41. |
The expression for the temperature stress is given by __________ |
| A. | Eₚαt |
| B. | Eₚαt/2 |
| C. | 2Eₚαt |
| D. | Eₚ/αt |
| Answer» B. Eₚαt/2 | |
| 42. |
Which of the following is incorrect regarding Cement concrete sewers? |
| A. | They are economical |
| B. | Can be manufactured at the site |
| C. | They can be made of any desired strength |
| D. | They cannot withstand tensile stress |
| Answer» E. | |
| 43. |
Which of the following sewer is called as an ovoid sewer? |
| A. | Asbestos cement sewer |
| B. | Egg shaped sewer |
| C. | Plain cement sewer |
| D. | Salt glazed sewer |
| Answer» C. Plain cement sewer | |
| 44. |
Which device is used to prevent the clogging of sewer pipes? |
| A. | Flushing tank |
| B. | Drop manhole |
| C. | Lamp hole |
| D. | Storm regulators |
| Answer» B. Drop manhole | |
| 45. |
Storm regulators are classified into how many types? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» C. 4 | |
| 46. |
The storm frequency for a peripheral commercial area is ____________ |
| A. | Once a year |
| B. | Twice a year |
| C. | Once in 2 years |
| D. | Once in a month |
| Answer» D. Once in a month | |
| 47. |
The Kuichlings formula when the storm occurs once in 10 years is ____________ |
| A. | R = 2667/(t + 50) |
| B. | R = 260/(t + 20) |
| C. | R = 2667/(t + 20) |
| D. | R = 260/t |
| Answer» D. R = 260/t | |
| 48. |
When the storm occurs once a year, the rainfall intensity R is ____________ |
| A. | R = 300/t⁰·⁶²⁵ |
| B. | R = 150/t⁰·⁶²⁵ |
| C. | R = 150/t² |
| D. | R = 300/t² |
| Answer» C. R = 150/t² | |
| 49. |
The non scouring velocity is 260cm/Sec. The type of material of the sewer is __________ |
| A. | Earth channels |
| B. | Stone ware sewers |
| C. | Brick lined sewer |
| D. | Cement concrete sewer |
| Answer» E. | |
| 50. |
The minimum diameter of the working chamber for a circular manhole is __________ |
| A. | 0.8m |
| B. | 0.9m |
| C. | 1m |
| D. | 1.2m |
| Answer» E. | |