MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 182 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 average quantity of water (in lpcd) required for domestic purposes according to IS code is |
| A. | 100 |
| B. | 120 |
| C. | 70 |
| D. | 135 |
| Answer» E. | |
| 2. |
                 should not be placed near water body. |
| A. | power generator |
| B. | soak pit |
| C. | pump stations |
| D. | houses |
| Answer» C. pump stations | |
| 3. |
What is the percentage of purification of septic tank effluent? |
| A. | 30% |
| B. | 50% |
| C. | 70% |
| D. | 90% |
| Answer» D. 90% | |
| 4. |
What is the shape of the septic tank? |
| A. | square |
| B. | rectangle |
| C. | circular |
| D. | oval |
| Answer» C. circular | |
| 5. |
               is used to clean blockage in the line. |
| A. | lateral chamber |
| B. | main chamber |
| C. | inspection chamber |
| D. | sewer chamber |
| Answer» D. sewer chamber | |
| 6. |
Grease should not be allowed to enter the normal drainage system. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 7. |
What is the recommended slope ratio for soil water pipes? |
| A. | 1:12 |
| B. | 1:20 |
| C. | 1:30 |
| D. | 1:40 |
| Answer» E. | |
| 8. |
What is the minimum diameter of the pipe used to collect black water? |
| A. | 50 mm |
| B. | 75 mm |
| C. | 100 mm |
| D. | 125 mm |
| Answer» D. 125 mm | |
| 9. |
What is the wastewater from kitchen sinks called? |
| A. | grey water |
| B. | black water |
| C. | yellow water |
| D. | brown water |
| Answer» B. black water | |
| 10. |
What is the water from urinals called? |
| A. | black water |
| B. | yellow water |
| C. | grey water |
| D. | brown water |
| Answer» B. yellow water | |
| 11. |
Submersible pumps require high maintenance. |
| A. | true |
| B. | false |
| Answer» C. | |
| 12. |
What is the minimum diameter of pipes used for drainage of waste water? |
| A. | 50 mm |
| B. | 75 mm |
| C. | 100 mm |
| D. | 105 mm |
| Answer» C. 100 mm | |
| 13. |
How many types of pumps are present? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 14. |
Which of the following stress in pipe depends on temperature? |
| A. | internal water pressure |
| B. | stress due to foundation reaction |
| C. | longitudinal stress |
| D. | temperature stress |
| Answer» E. | |
| 15. |
Pipe corrosion can be minimized by |
| A. | removal of copper sulfate |
| B. | addition of calcium carbonate |
| C. | addition of carbon dioxide |
| D. | removal of dissolved oxygen |
| Answer» E. | |
| 16. |
The water supply pipes are buried underground. The load on the buried pipe due to earth filling is given by |
| A. | w = c*y*b |
| B. | w = c*y/b |
| C. | w = c*y*b2 |
| D. | w = c*y2*b |
| Answer» D. w = c*y2*b | |
| 17. |
               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 | |
| 18. |
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. | |
| 19. |
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. | |
| 20. |
The hourly demand rate is constant throughout the day. |
| A. | true |
| B. | false |
| Answer» C. | |
| 21. |
In which system of water supply, water is supplied only during fixed hours of the day? |
| A. | continuous supply |
| B. | fixed supply |
| C. | intermittent supply |
| D. | low supply |
| Answer» D. low supply | |
| 22. |
In which system of water supply, water is available for 24 hours but uneconomically used? |
| A. | continuous supply |
| B. | fixed supply |
| C. | intermittent supply |
| D. | low supply |
| Answer» B. fixed supply | |
| 23. |
The velocity of water in a 10 cm diameter pipe should be |
| A. | 0.2m/sec |
| B. | 0.5m/sec |
| C. | 0.9m/sec |
| D. | 1.2m/sec |
| Answer» D. 1.2m/sec | |
| 24. |
The pressure in the distribution mains does not depend on |
| A. | altitude to supply water |
| B. | fire fighting requirements |
| C. | availability of funds |
| D. | quality of water |
| Answer» E. | |
| 25. |
In which of the following distribution system, the clean water flows entirely under gravity? |
| A. | gravity system |
| B. | pressure system |
| C. | combined gravity and pumping system |
| D. | pumping system |
| Answer» B. pressure system | |
| 26. |
There is a 8 storey residential building in Lucknow. What is the pressure in the distribution mains? |
| A. | 2kg/cm2 |
| B. | 5kg/cm2 |
| C. | 7kg/cm2 |
| D. | 10kg/cm2 |
| Answer» C. 7kg/cm2 | |
| 27. |
The method of distribution of water is divided into how many types? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 28. |
Inferential meters can be used for both low and high flows. |
| A. | true |
| B. | false |
| Answer» C. | |
| 29. |
                         is used to measure the flow velocity across a cross-section with a known area. |
| A. | inferential meter |
| B. | anemometer |
| C. | speedometer |
| D. | barometer |
| Answer» B. anemometer | |
| 30. |
                         is used to measure flows to domestic buildings. |
| A. | rain gauge |
| B. | water tank |
| C. | drainpipe |
| D. | water meter |
| Answer» E. | |
| 31. |
Which of the following is not true about plastic pipes? |
| A. | plastic pipes are cheaper than the metal pipes |
| B. | plastic pipes are light in weight |
| C. | plastic pipes can be installed with ordinary tools |
| D. | plastic pipes are corrosive |
| Answer» E. | |
| 32. |
Which of the following is not true about lead pipes? |
| A. | lead pipes are highly resistant to corrosion |
| B. | they have a low hydraulic coefficient of flow |
| C. | lead pipes are highly flexible |
| D. | when lead goes into solution, it has a cumulative poisoning effect |
| Answer» C. lead pipes are highly flexible | |
| 33. |
Light gauge copper tubes are used for general purpose work where the pressure is not more than 0.15 N/mm2. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 34. |
Which of the following is not a component of the plumbing drainage system? |
| A. | water closets |
| B. | taps |
| C. | vent pipes |
| D. | urinals |
| Answer» C. vent pipes | |
| 35. |
Which of the following is not a component of plumbing water supply system? |
| A. | washbasin |
| B. | water supply and distribution pipes |
| C. | valves |
| D. | storage tanks |
| Answer» B. water supply and distribution pipes | |
| 36. |
Fluorex is a special mixture of |
| A. | di-calcium phosphate and carbon |
| B. | tri-calcium phosphate and hydroxyapatite |
| C. | di-calcium phosphate and phosphoric acid |
| D. | tri-calcium phosphate and carbon |
| Answer» C. di-calcium phosphate and phosphoric acid | |
| 37. |
Which material is used for removing fluorides from hard water containing 3ppm of fluorides? |
| A. | lime |
| B. | copper sulfate |
| C. | synthetic tri-calcium phosphate |
| D. | bone charcoal |
| Answer» B. copper sulfate | |
| 38. |
Which of the following is not used for defluoridation? |
| A. | calcium phosphate |
| B. | copper sulfate |
| C. | alum |
| D. | bone charcoal |
| Answer» C. alum | |
| 39. |
The process of reducing the fluoride content from water is called |
| A. | chlorination |
| B. | fluoridation |
| C. | defluoridation |
| D. | flocculation |
| Answer» D. flocculation | |
| 40. |
What happens when water contains 8-20 ppm of fluoride concentration? |
| A. | blue baby disease |
| B. | crippling fluorosis |
| C. | dental fluorosis |
| D. | mottling of teeth |
| Answer» C. dental fluorosis | |
| 41. |
Which material is used in contact filters for the removal of fluorides? |
| A. | calcium phosphate |
| B. | copper sulfate |
| C. | synthetic tri-calcium phosphate |
| D. | bone charcoal |
| Answer» D. bone charcoal | |
| 42. |
Fluorides in solution form are preferred over powdered form for fluoridation. |
| A. | true |
| B. | false |
| Answer» C. | |
| 43. |
Which of the following is the pure compound? |
| A. | sodium fluoride |
| B. | sodium silico fluoride |
| C. | hydrofluosilicic acid |
| D. | sodium fluro carbonate |
| Answer» B. sodium silico fluoride | |
| 44. |
Which of the following is not used as a fluoride compound? |
| A. | sodium fluoride |
| B. | sodium silico fluoride |
| C. | hydrofluosilicic acid |
| D. | sodium fluro carbonate |
| Answer» E. | |
| 45. |
In which process, the fluoride content of water is raised? |
| A. | chlorination |
| B. | fluoridation |
| C. | defluoridation |
| D. | flocculation |
| Answer» C. defluoridation | |
| 46. |
The fluoride concentration for prevention of dental caries is |
| A. | 1mg/l |
| B. | 2mg/l |
| C. | 3mg/l |
| D. | 4mg/l |
| Answer» B. 2mg/l | |
| 47. |
What is the maximum allowable flow for backwash? |
| A. | 20 m/hr |
| B. | 45 m/hr |
| C. | 60 m/hr |
| D. | 80 m/hr |
| Answer» D. 80 m/hr | |
| 48. |
Manganese oxidation requires a high oxidation potential. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 49. |
What is the desirable bed depth for AFM filtration? |
| A. | 1000 mm |
| B. | 1200 mm |
| C. | 1500 mm |
| D. | 1800 mm |
| Answer» C. 1500 mm | |
| 50. |
What is the minimum required redox potential of water? |
| A. | 100 mv |
| B. | 200 mv |
| C. | 300 mv |
| D. | 400 mv |
| Answer» C. 300 mv | |