MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 40 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The velocity of water in the pipe is 1.8m/Sec. What is the diameter of pipe used? |
| A. | 10cm |
| B. | 15cm |
| C. | 25cm |
| D. | 40cm |
| Answer» E. | |
| 2. |
State whether the following statement is true or false.Lead pipes are used in water supply mains. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
According the mass curve method, the storage capacity is defined as |
| A. | Maximum excess of supply / Maximum excess of demand |
| B. | Maximum excess of supply * Maximum excess of demand |
| C. | Maximum excess of supply – Maximum excess of demand |
| D. | Maximum excess of supply + Maximum excess of demand |
| Answer» E. | |
| 4. |
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 | |
| 5. |
Which of the following surface has a maximum Kuichling's impermeability factor? |
| A. | Gravel road |
| B. | Water tight roof surface |
| C. | Unpaved surface |
| D. | Macadamized road ways |
| Answer» C. Unpaved surface | |
| 6. |
Consider the following statement.The storm water flow depends on1. Catchment area2. Ground slope3. Quality of water4. Rainfall durationWhich of the following is correct? |
| A. | 1, 2 |
| B. | 1, 2, 3 |
| C. | 1, 2, 4 |
| D. | 1, 4 |
| Answer» D. 1, 4 | |
| 7. |
State whether the following statement is true or false.Conservancy system is a highly unhygienic system, causing insanitary conditions. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
The choice of combined water carriage system does not depend on |
| A. | Space consideration |
| B. | Even rainfall pattern |
| C. | Steep topography |
| D. | Pumping requirements |
| Answer» D. Pumping requirements | |
| 9. |
Shorter the duration of rainfall, ____ will be the rainfall intensity. |
| A. | Lesser |
| B. | Constant |
| C. | Slightly lesser |
| D. | Greater |
| Answer» E. | |
| 10. |
State whether the following statement is true or false.The peaking factor is directly proportional to the population of the city. |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
State whether the following statement is true or false.The water carriage system is more suitable in rural conditions. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Infiltration of water does not depend on |
| A. | Size of sewer |
| B. | Sewer material |
| C. | Quality of water |
| D. | Type of soil |
| Answer» D. Type of soil | |
| 13. |
_________ flow persists for various time duration. |
| A. | Minimum sewage |
| B. | Maximum sewage |
| C. | Sustained |
| D. | Average sewage |
| Answer» D. Average sewage | |
| 14. |
When the storm occurs once a year, the rainfall intensity R is |
| A. | R = 300/ t 0.625 |
| B. | R = 150/ t 0.625 |
| C. | R = 150/ t 2 |
| D. | R = 300/ t 2 |
| Answer» C. R = 150/ t 2 | |
| 15. |
Which of the following represents the peak flow? |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 16. |
Which of the following is incorrect regarding partially combined water carriage system? |
| A. | The sewers are of reasonable size |
| B. | There is choking of sewer |
| C. | The storm water increases load on treatment units |
| D. | The storm water increases the cost of pumping |
| Answer» C. The storm water increases load on treatment units | |
| 17. |
Which of the following is a disadvantage of a separate water carriage system? |
| A. | Low installation charge |
| B. | No loads on treatment units |
| C. | Lesser air contact with small sized sewer |
| D. | Provision of the automatic flushing tank is not required |
| Answer» D. Provision of the automatic flushing tank is not required | |
| 18. |
Which of the following is correct regarding water carriage system? |
| A. | Chances of the epidemic is there |
| B. | Foul smell is produced |
| C. | Does not cause pollution |
| D. | Highly dependent on labours |
| Answer» D. Highly dependent on labours | |
| 19. |
___________ is the process in which ground water unfiltrate into the sewers. |
| A. | Exfiltration |
| B. | Infiltration |
| C. | Filtration |
| D. | Osmosis |
| Answer» C. Filtration | |
| 20. |
The design period of main and branch sewer is |
| A. | 5years |
| B. | 10years |
| C. | 30years |
| D. | 40years |
| Answer» D. 40years | |
| 21. |
The storm frequency for a peripheral residential area is ___ a year. |
| A. | Once |
| B. | Twice |
| C. | Thrice |
| D. | 4 times |
| Answer» C. Thrice | |
| 22. |
The wet weather flow is also known by ______ |
| A. | Minimum sewage flow |
| B. | Maximum sewage flow |
| C. | Storm water flow |
| D. | Average rate of flow |
| Answer» D. Average rate of flow | |
| 23. |
The Lateral sewer has a peaking factor of ___ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 24. |
If the type of surface is of the most densely populated portion of the city, what is the value of Kuichling's impermeability factor? |
| A. | 0.14 |
| B. | 0.3 |
| C. | 0.8 |
| D. | 0.45 |
| Answer» D. 0.45 | |
| 25. |
________ is the process which indicates the flow of waste water from the sewer into the ground. |
| A. | Exfiltration |
| B. | Infiltration |
| C. | Filtration |
| D. | Osmosis |
| Answer» B. Infiltration | |
| 26. |
Which of the following has a maximum peaking factor? |
| A. | Domestic sewer |
| B. | Branch sewer |
| C. | Main sewer |
| D. | Trunk sewer |
| Answer» B. Branch sewer | |
| 27. |
State whether the following statement is true or false.The water carriage system is a hygienic system without any bad smell. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 28. |
Normally, the amount of water required for flushing operation is _____ litres. |
| A. | 10-20 |
| B. | 5-10 |
| C. | 15-20 |
| D. | 20-30 |
| Answer» C. 15-20 | |
| 29. |
The value of Fruhlings factor for suburban locality is ______ |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.5 |
| D. | 0.8 |
| Answer» D. 0.8 | |
| 30. |
The valve which is preferred in elevated tanks and stand pipes is |
| A. | Altitude valve |
| B. | Pressure relief valve |
| C. | Reflux valve |
| D. | Air relief valve |
| Answer» B. Pressure relief valve | |
| 31. |
The point R in the figure represents the ________ |
| A. | Minimum flow |
| B. | Maximum flow |
| C. | Average rate of flow |
| D. | Peak flow |
| Answer» D. Peak flow | |
| 32. |
State whether the following statement is true or false.The hourly demand rate is constant throughout the day. |
| A. | True |
| B. | False |
| Answer» C. | |
| 33. |
The pre-stressed concrete pipes are used for heads ____ |
| A. | <8m |
| B. | <61m |
| C. | >60m |
| D. | <35m |
| Answer» D. <35m | |
| 34. |
_______ causes hoop tension in pipe shell. |
| A. | Internal water pressure |
| B. | External water pressure |
| C. | Water hammer |
| D. | Longitudinal stress |
| Answer» B. External water pressure | |
| 35. |
Which of the following is correct regarding Cement concrete pipes? |
| A. | They are corrosive |
| B. | The maintenance cost is high |
| C. | Unreinforced pipes are liable to tensile crack |
| D. | It is easy to repair them |
| Answer» D. It is easy to repair them | |
| 36. |
Which grade of concrete is used in Reinforced concrete pipes? |
| A. | M10 |
| B. | M15 |
| C. | M20 |
| D. | M25 |
| Answer» E. | |
| 37. |
The peaking factor is defined by |
| A. | Peak flow * Average flow |
| B. | Peak flow – Average flow |
| C. | Peak flow + Average flow |
| D. | Peak flow / Average flow |
| Answer» E. | |
| 38. |
The rate of infiltration lies in the range of ______ m3/hectare/day. |
| A. | 0.20-0.28 |
| B. | 0.42-0.63 |
| C. | 0.60-0.80 |
| D. | 0.70-0.90 |
| Answer» B. 0.42-0.63 | |
| 39. |
Which of the following is an advantage of the combined water carriage system? |
| A. | There is more air in large sewer |
| B. | There is the inclusion of storm water |
| C. | There is difficulties in ventilation of large sewer |
| D. | Overflowing of sewer |
| Answer» B. There is the inclusion of storm water | |
| 40. |
State whether the following statement is true of false.The maximum runoff occurs when the duration of storm equals the time of concentration. |
| A. | True |
| B. | False |
| Answer» B. False | |