MCQOPTIONS
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MCQOPTIONS
This section includes 109 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. |
Which of the following is a disadvantage of Asbestos cement pipe? |
| A. | They are light weight |
| B. | They have smooth internal surface |
| C. | They are anti corrosive |
| D. | They are soft and brittle. |
| Answer» E. | |
| 2. |
Which of the following is known as Shut off valve? |
| A. | Air relief valve |
| B. | Sluice valve |
| C. | Pressure relief valve |
| D. | Altitude valve |
| Answer» C. Pressure relief valve | |
| 3. |
Which of the following is known as washout valve? |
| A. | Scour valve |
| B. | Sluice valve |
| C. | Reflux valve |
| D. | Altitude valve |
| Answer» B. Sluice valve | |
| 4. |
_________ valve allows water to flow in one direction only. |
| A. | Air relief valve |
| B. | Sluice valve |
| C. | Reflux valve |
| D. | Altitude valve |
| Answer» D. Altitude valve | |
| 5. |
The spacing between the Sluice valves is ____________ |
| A. | 10m |
| B. | 30m |
| C. | 80m |
| D. | 180m |
| Answer» E. | |
| 6. |
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 | |
| 7. |
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. | |
| 8. |
The enlarged end of a cast iron pipe is called ________ |
| A. | Lead |
| B. | Socket |
| C. | Hemp |
| D. | Spigot end |
| Answer» C. Hemp | |
| 9. |
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 | |
| 10. |
The efficiency of the pump at quarter load is ____________ |
| A. | 50% |
| B. | 70% |
| C. | 80% |
| D. | 100% |
| Answer» B. 70% | |
| 11. |
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. | |
| 12. |
The tensile strength of Asbestos cement pipes is _____ |
| A. | 200kg/cm² |
| B. | 300kg/cm² |
| C. | 400kg/cm² |
| D. | 600kg/cm² |
| Answer» B. 300kg/cm² | |
| 13. |
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 | |
| 14. |
What is the quantity of lead required for a 15cm diameter cast iron pipe? |
| A. | 5kg |
| B. | 10kg |
| C. | 15kg |
| D. | 20kg |
| Answer» B. 10kg | |
| 15. |
The installed capacity of the pump does not depend on which of the following? |
| A. | The maximum rate of hourly demand |
| B. | Balancing storage |
| C. | Power of pump |
| D. | Operation schedule |
| Answer» D. Operation schedule | |
| 16. |
Which of the following is incorrect regarding cast iron pipes? |
| A. | They are non corrosive |
| B. | They are durable |
| C. | They can be produced by centrifugal process |
| D. | Their length varies from 80-100cm |
| Answer» E. | |
| 17. |
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 | |
| 18. |
______ valves are used to remove sand and silt from the pipelines. |
| A. | Air relief valve |
| B. | Sluice valve |
| C. | Scour valve |
| D. | Altitude valve |
| Answer» D. Altitude valve | |
| 19. |
The method of distribution of water is divided into how many types? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 20. |
Which of the following is used to stop the water supplies when required? |
| A. | Air relief valve |
| B. | Sluice valve |
| C. | Pressure relief valve |
| D. | Altitude valve |
| Answer» C. Pressure relief valve | |
| 21. |
The pressure in distribution mains in a residential building up to three storeys is ____________ |
| A. | 2kg/cm² |
| B. | 5kg/cm² |
| C. | 7kg/cm² |
| D. | 10kg/cm² |
| Answer» B. 5kg/cm² | |
| 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. |
Which grade of concrete is used in Reinforced concrete pipes? |
| A. | M10 |
| B. | M15 |
| C. | M20 |
| D. | M25 |
| Answer» E. | |
| 24. |
The hourly demand rate is constant throughout the day. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 25. |
Which of the following joint is called run lead joint? |
| A. | Tyton joint |
| B. | Coupled joint |
| C. | Spigot and socket joint |
| D. | Flanged joint |
| Answer» D. Flanged joint | |
| 26. |
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. | |
| 27. |
Which of the following is the advantage of cast iron pipes? |
| A. | They are subjected to tuberculation in certain water |
| B. | They are fragile |
| C. | They are heavier |
| D. | They are resistant to corrosion. |
| Answer» E. | |
| 28. |
The Gate valves are made of _______ with brass mountings. |
| A. | Cement concrete |
| B. | Reinforced concrete |
| C. | Cast iron |
| D. | Galvanized iron |
| Answer» D. Galvanized iron | |
| 29. |
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 | |
| 30. |
_______ 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 | |
| 31. |
Mcwane pipes are ___ stronger in tension than Pit cast pipes. |
| A. | 20% |
| B. | 30% |
| C. | 50% |
| D. | 100% |
| Answer» E. | |
| 32. |
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 | |
| 33. |
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. | |
| 34. |
Which of the following is not included in the friction head? |
| A. | Head Loss in entire length of piping |
| B. | Total static head |
| C. | Head Loss in bend tees |
| D. | Head Loss in valves |
| Answer» C. Head Loss in bend tees | |
| 35. |
When the pumps are in series operation? |
| A. | H = H₁ + H₂ |
| B. | 1/H = 1/H₁ +1/ H₂ |
| C. | Q = Q₁ + Q₂ |
| D. | 1/Q = 1/Q₁ + 1/Q₂ |
| Answer» B. 1/H = 1/H₁ +1/ H₂ | |
| 36. |
The efficiency of the pump at half load is ____________ |
| A. | 50% |
| B. | 70% |
| C. | 80% |
| D. | 100% |
| Answer» C. 80% | |
| 37. |
The reciprocating pump has a ______ flow. |
| A. | Pulsating |
| B. | Uniform |
| C. | Continuous |
| D. | Constant |
| Answer» B. Uniform | |
| 38. |
Which of the following type of pump is based on the number of entrances to the impeller? |
| A. | Single stage pump |
| B. | Single suction pump |
| C. | Mixed flow pump |
| D. | Horizontal pump |
| Answer» C. Mixed flow pump | |
| 39. |
Radial flow pump is a pump classified on the basis of _____________ |
| A. | Direction of flow |
| B. | Number of impellers |
| C. | Number of entrances to the impeller |
| D. | On the basis of shaft |
| Answer» B. Number of impellers | |
| 40. |
When the specific speed of the pump is |
| A. | Reciprocating pump |
| B. | Centrifugal pump |
| C. | Mixed flow pump |
| D. | Axial flow pump |
| Answer» C. Mixed flow pump | |
| 41. |
The specific speed of a pump is given by _____________ |
| A. | NQ½ / H² |
| B. | NQ½ / H¾ |
| C. | NQ / H¾ |
| D. | NQ½ / H¼ |
| Answer» C. NQ / H¾ | |
| 42. |
The maximum number of impellers in a centrifugal well pump is _____________ |
| A. | 20 |
| B. | 30 |
| C. | 40 |
| D. | 50 |
| Answer» B. 30 | |
| 43. |
How many types of hand pumps are used? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 44. |
_______ is provided at the entrance of suction pipe during centrifugal pump installation. |
| A. | Delivery pipe |
| B. | Foot valve |
| C. | Strainer |
| D. | Check valve |
| Answer» D. Check valve | |
| 45. |
Which part of centrifugal well pumps act as a self priming device? |
| A. | Delivery pipe |
| B. | Foot valve |
| C. | Strainer |
| D. | Check valve |
| Answer» D. Check valve | |
| 46. |
The diameter of turbine used in centrifugal well pump is _____________ |
| A. | 50cm |
| B. | 64cm |
| C. | 15cm |
| D. | 100cm |
| Answer» D. 100cm | |
| 47. |
Which of the following pump is classified based on the type of service? |
| A. | Displacement pump |
| B. | Centrifugal pump |
| C. | Deep well pump |
| D. | Electric driven pump |
| Answer» D. Electric driven pump | |
| 48. |
Displacement pump is classified on the basis of _____________ |
| A. | Mechanical operation of principle |
| B. | Type of power |
| C. | Type of service |
| D. | Efficiency |
| Answer» B. Type of power | |
| 49. |
A booster pump is based on _____________ |
| A. | Mechanical operation of principle |
| B. | Type of power |
| C. | Type of service |
| D. | Efficiency |
| Answer» D. Efficiency | |
| 50. |
When the pumps are in parallel operation? |
| A. | H = H₁ + H₂ |
| B. | 1/H = 1/H₁ +1/ H₂ |
| C. | Q = Q₁ + Q₂ |
| D. | 1/Q = 1/Q₁ + 1/Q₂ |
| Answer» D. 1/Q = 1/Q₁ + 1/Q₂ | |