McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering , Mechanical Engineering .
| 1. |
Which system of collection of sewage is a dry system? |
| A. | conservancy system |
| B. | biological digestion |
| C. | incernation |
| D. | water carriage system |
| Answer» A. conservancy system | |
| 2. |
After how many years, night soil gives good quality manure? |
| A. | 1 |
| B. | 5 |
| C. | 10 |
| D. | 14 |
| Answer» A. 1 | |
| 3. |
Conservancy system is a highly unhygienic system, causing insanitary conditions. |
| A. | true |
| B. | false |
| Answer» A. true | |
| 4. |
Which of the following is not correct regarding conservancy system? |
| A. | high maintenance cost |
| B. | highly unhygienic system |
| C. | independent of labour |
| D. | chances of epidemic |
| Answer» C. independent of labour | |
| 5. |
Which system of collection of sewage is called a dry system? |
| A. | conservancy system |
| B. | biological digestion |
| C. | incernation |
| D. | water carriage system |
| Answer» A. conservancy system | |
| 6. |
is a method where water is used as a medium for the flow of sewage from its production of the treatment unit. |
| A. | conservancy system |
| B. | biological digestion |
| C. | incernation |
| D. | water carriage system |
| Answer» D. water carriage system | |
| 7. |
The water carriage system is a hygienic system without any bad smell. |
| A. | true |
| B. | false |
| Answer» A. true | |
| 8. |
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» C. does not cause pollution | |
| 9. |
Which of the following is an advantage of a separate water carriage system? |
| A. | get choked easily |
| B. | difficult to clean the sewer |
| C. | two sets of sewer are used |
| D. | the more uniform character of sewage |
| Answer» D. the more uniform character of sewage | |
| 10. |
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» C. lesser air contact with small sized sewer | |
| 11. |
provides only one sewer to carry both foul sewage and rainwater. |
| A. | separate water carriage system |
| B. | combined water carriage system |
| C. | partially combined water carriage system |
| D. | conservancy system |
| Answer» B. combined water carriage system | |
| 12. |
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» A. there is more air in large sewer | |
| 13. |
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» B. there is choking of sewer | |
| 14. |
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» C. steep topography | |
| 15. |
is the flow through sewers available during non-rainfall period. |
| A. | gradually varied flow |
| B. | rapidly varied flow |
| C. | dry weather flow |
| D. | storm water flow |
| Answer» C. dry weather flow | |
| 16. |
is the additional flow occurring during rainy season. |
| A. | gradually varied flow |
| B. | rapidly varied flow |
| C. | dry weather flow |
| D. | storm water flow |
| Answer» D. storm water flow | |
| 17. |
Which flow is also called as sanitary sewage? |
| A. | dry weather flow |
| B. | storm weather flow |
| C. | uniform flow |
| D. | non uniform flow |
| Answer» A. dry weather flow | |
| 18. |
Which of the following factor does not effect the dry weather flow? |
| A. | rate of water supply |
| B. | temperature conditions |
| C. | population growth |
| D. | infiltration of ground water |
| Answer» B. temperature conditions | |
| 19. |
The sewer should be designed for a minimum of litres of waste water per capita per day. |
| A. | 50 |
| B. | 100 |
| C. | 150 |
| D. | 1000 |
| Answer» C. 150 | |
| 20. |
is the process in which ground water unfiltrate into the sewers. |
| A. | exfiltration |
| B. | infiltration |
| C. | filtration |
| D. | osmosis |
| Answer» B. infiltration | |
| 21. |
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» A. exfiltration | |
| 22. |
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» D. peak flow / average flow | |
| 23. |
The peaking factor is directly proportional to the population of the city. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 24. |
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» C. storm water flow | |
| 25. |
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» B. water tight roof surface | |
| 26. |
The expression of the Chezy’s formula is given by |
| A. | v = c/rs |
| B. | v = crs2 |
| C. | v = c (rs)1/2 |
| D. | v = c/ (rs)1/2 |
| Answer» C. v = c (rs)1/2 | |
| 27. |
Which of the following is the expression of the Manning’s formula? |
| A. | $$$V = R^{1/2}S^{1/2}/N$$$ |
| B. | $$$V = R^{2/3}S^{2}/N$$$ |
| C. | $$$V = R^{2/3}S^{1/2}/N$$$ |
| D. | $$$V = R^{2/3}S^{1/2}$$$ |
| Answer» C. $$$V = R^{2/3}S^{1/2}/N$$$ | |
| 28. |
is the velocity at which the solid matter in sewage remained in suspended form. |
| A. | settling velocity |
| B. | self cleansing velocity |
| C. | mean velocity |
| D. | non scouring velocity |
| Answer» B. self cleansing velocity | |
| 29. |
Primary treatment of sewage consists of removal of |
| A. | large suspended organic solids |
| B. | oil and grease |
| C. | sandand grit |
| D. | floating materials |
| Answer» A. large suspended organic solids | |
| 30. |
The most widely used pumps for sewage lifting is |
| A. | centrifugal pummp |
| B. | reciprocating pump |
| C. | pneumatic ejector |
| D. | air pressure pump |
| Answer» A. centrifugal pummp | |
| 31. |
Drop man holes are generally provided in sewers for |
| A. | industrial reas |
| B. | large township |
| C. | hilly townships |
| D. | cities in plains |
| Answer» C. hilly townships | |
| 32. |
The pollution zones in the river are divided into how many types? |
| A. | 3 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» B. 4 | |
| 33. |
In which pollution zone of the river, growth of algae reappear? |
| A. | zone of degradation |
| B. | zone of recovery |
| C. | zone of active decomposition |
| D. | zone of clean water |
| Answer» B. zone of recovery | |
| 34. |
In which pollution zone of the river, the dissolved oxygen reduced to 0? |
| A. | zone of degradation |
| B. | zone of recovery |
| C. | zone of clean water |
| D. | zone of active decomposition |
| Answer» D. zone of active decomposition | |
| 35. |
Which is the third zone of pollution in the river? |
| A. | zone of recovery |
| B. | zone of degradation |
| C. | zone of clean water |
| D. | zone of active decomposition |
| Answer» A. zone of recovery | |
| 36. |
What is yellow curve represents in the following figure? |
| A. | deoxygenation curve |
| B. | reoxygenation curve |
| C. | oxygen sag curve |
| D. | equilibrium concentration of oxygen |
| Answer» A. deoxygenation curve | |
| 37. |
Which of the following is represented b the green curve in the above figure? |
| A. | deoxygenation curve |
| B. | reoxygenation curve |
| C. | oxygen sag curve |
| D. | equilibrium concentration of oxygen |
| Answer» B. reoxygenation curve | |
| 38. |
The maximum deficiency of dissolved oxygen is represented by |
| A. | dotted blue line |
| B. | green curve |
| C. | yellow curve |
| D. | violet curve |
| Answer» A. dotted blue line | |
| 39. |
Which of the following represents the oxygen sag curve in the following figure? |
| A. | dotted blue line |
| B. | green curve |
| C. | yellow curve |
| D. | red curve |
| Answer» D. red curve | |
| 40. |
The reoxygenation constant at temperature ‘T’ is expressed by |
| A. | krt = kr20 (1.016)t |
| B. | krt = kr20 (1.047) t-20 |
| C. | krt = kr20 (1.016)t-20 |
| D. | krt = kr20 (1.047)t |
| Answer» C. krt = kr20 (1.016)t-20 | |
| 41. |
The minimum spacing between the bars on fine screen is |
| A. | 0.3mm |
| B. | 0.9mm |
| C. | 1.5mm |
| D. | 0.5mm |
| Answer» C. 1.5mm | |
| 42. |
The spacing between the bars in racks is |
| A. | 30mm |
| B. | 50mm |
| C. | 70mm |
| D. | 90mm |
| Answer» B. 50mm | |
| 43. |
Screens are inclined to the direction of flow to |
| A. | increase the flow velocity |
| B. | increase the opening area |
| C. | decrease the flow velocity |
| D. | increase the head loss |
| Answer» C. decrease the flow velocity | |
| 44. |
The maximum spacing between the bars in medium screen is |
| A. | 40mm |
| B. | 50mm |
| C. | 70mm |
| D. | 90mm |
| Answer» A. 40mm | |
| 45. |
What is the maximum capacity of medium screen in collecting solids? |
| A. | 30l |
| B. | 40l |
| C. | 50l |
| D. | 90l |
| Answer» D. 90l | |
| 46. |
The design velocity of flow of a detritus tank is |
| A. | 1m/sec |
| B. | 1.2m/sec |
| C. | 0.9m/sec |
| D. | 0.5m/sec |
| Answer» C. 0.9m/sec | |
| 47. |
Which of the following device is used for the removal of oil and grease? |
| A. | skimming tank |
| B. | grit chambers |
| C. | tube settlers |
| D. | flocculator |
| Answer» A. skimming tank | |
| 48. |
How many types of settling are there in the sedimentation tank? |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» B. 4 | |
| 49. |
In which type of settling, sedimentation of discrete particles takes place? |
| A. | zone settling |
| B. | compression settling |
| C. | hindered settling |
| D. | discrete settling |
| Answer» D. discrete settling | |
| 50. |
The settling velocity of spherical particle is given by |
| A. | darcy weisbach equation |
| B. | hazen and william equation |
| C. | stokes equation |
| D. | bernoulli’s equation |
| Answer» C. stokes equation | |
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