MCQOPTIONS
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MCQOPTIONS
This section includes 27 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 yield of a rapid gravity filter as compared to that of slow sand filter, is~! |
| A. | 10 times |
| B. | 15 times |
| C. | 20 times |
| D. | 30 times |
| Answer» E. | |
| 2. |
*$_Time of concentration? |
| A. | is the time taken, for precipitation |
| B. | duration of rainfall. |
| C. | time taken for all the ran off to reach the drain |
| D. | time taken for the storm water to travel from the most remote point to the drain. |
| Answer» E. | |
| 3. |
*/*_When the reduced level of the water source is higher than the reduced level of the consumer's place, water is generally supplied? |
| A. | By pumping system |
| B. | By gravitational system |
| C. | Both (A) and (B) |
| D. | All the above |
| Answer» C. Both (A) and (B) | |
| 4. |
*/*_Surge tanks are used? |
| A. | for storage water |
| B. | to increase the velocity in a pipeline |
| C. | as overflow valves |
| D. | to guard against water hammer |
| Answer» E. | |
| 5. |
*/*_If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is? |
| A. | 1880 kilo litres |
| B. | 2880 kilo litres |
| C. | 3880 kilo litres |
| D. | 4880 kilo litres |
| Answer» C. 3880 kilo litres | |
| 6. |
*/*_Asbestos pipes are? |
| A. | light in weight and easy to transport |
| B. | highly resistant to corrosion |
| C. | very much smooth and hydraulically efficient |
| D. | all the above |
| Answer» E. | |
| 7. |
*/*_In centrifugal pump installation,? |
| A. | Pump is properly primed before starting |
| B. | The diameter of the pipe at inlet as well as at outlet, is kept smaller than the delivery pipe |
| C. | The motor may burn out if it is started with empty delivery pipe and with open gate valve |
| D. | All the above |
| Answer» E. | |
| 8. |
*/*_Specific capacity or yield of wells, is generally expressed, as? |
| A. | m³/sec |
| B. | m³/hour |
| C. | m³/hour/m² |
| D. | m³/hour/m²/m |
| Answer» E. | |
| 9. |
%_The specific retention is least in case of_% |
| A. | Clay |
| B. | Sand |
| C. | Silt |
| D. | Coarse gravel. |
| Answer» E. | |
| 10. |
_ In slow sland filters, the turbidity of raw water can be removed only up to$? |
| A. | 60 mg/litre |
| B. | 75 mg/litre |
| C. | 100 gm/litre |
| D. | 150 mg/litre |
| Answer» B. 75 mg/litre | |
| 11. |
_ According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for$? |
| A. | Boarding schools |
| B. | Nurses home and medical quarters |
| C. | hostels |
| D. | all the above |
| Answer» E. | |
| 12. |
_ In distribution pipes, drain valves are provided at$? |
| A. | lower point |
| B. | higher point |
| C. | junction points |
| D. | any where |
| Answer» B. higher point | |
| 13. |
_ In pressure supply mains, water hammer pressure is reduced by providing$? |
| A. | Sluice valves |
| B. | Air valves |
| C. | Pressure relief valves |
| D. | None of these |
| Answer» D. None of these | |
| 14. |
_ Disinfection of drinking water, is done to remove$? |
| A. | odour |
| B. | bacterias |
| C. | turbidity |
| D. | colour |
| Answer» C. turbidity | |
| 15. |
_ Pick up the incorrect statement from the following. The underground sources of water, is from$? |
| A. | wells |
| B. | springs |
| C. | infiltration wells |
| D. | storage reservoirs |
| Answer» E. | |
| 16. |
_Acidity in water is caused due to$? |
| A. | Mineral acids |
| B. | Free CO‚ÇÇ |
| C. | Aluminium sulphate |
| D. | All the above. |
| Answer» E. | |
| 17. |
_By boiling water, hardness can be removed if it is due to$? |
| A. | calcium sulphate |
| B. | magnesium sulphate |
| C. | calcium nitrate |
| D. | calcium bicarbonate |
| Answer» E. | |
| 18. |
_Surcharge storage zone of a reservoir, is$? |
| A. | Below dead storage |
| B. | Between dead storage and useful storage |
| C. | Above useful storage |
| D. | Also known as valley storage |
| Answer» D. Also known as valley storage | |
| 19. |
_While determining the yield of open wells by the pumping test$? |
| A. | Velocity of recharging water, increases with depression head |
| B. | Depression head resulting at critical velocity, is called critical depression head |
| C. | Working head is generally limited to ?rd of the critical depression head |
| D. | Maximum safe yield of an open well, is expected at critical depression head |
| Answer» E. | |
| 20. |
_The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is$? |
| A. | 2 m |
| B. | 2.25 m |
| C. | 2.50 m |
| D. | 3.00 m |
| Answer» E. | |
| 21. |
_Sunlight$? |
| A. | helps growth of bacterias |
| B. | impedes growth of algae |
| C. | increases dissolved oxygen content |
| D. | reduces turbidity |
| Answer» C. increases dissolved oxygen content | |
| 22. |
_Aeration of water is done to remove$? |
| A. | odour |
| B. | colour |
| C. | bacterias |
| D. | hardness |
| Answer» B. colour | |
| 23. |
_Corrosion of well pipes may not be reduced by$? |
| A. | reducing the draw down and the pumping rate |
| B. | reducing the flow velocity |
| C. | using thicker pipes |
| D. | using screens having larger area of openings |
| Answer» E. | |
| 24. |
Mathamoglobinemia or blue baby disease is caused due to? |
| A. | Chlorides |
| B. | Nitrites |
| C. | Nitrates |
| D. | Sulphides |
| Answer» D. Sulphides | |
| 25. |
To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 ‚à öQ, the water horse power of the pump is# |
| A. | 400 |
| B. | 450 |
| C. | 500 |
| D. | 600 |
| Answer» E. | |
| 26. |
The R.L. of ground water table on the sides of a valley is 1505 m whereas R.L. of the stream water is 1475 m. If 60° slope consists of pervious soil between R.L. 1485 m to 1500 m, the gravity spring may be expected at the point of reduced level# |
| A. | 1500 m |
| B. | 1505 m |
| C. | 1475 m |
| D. | 1485 m |
| Answer» E. | |
| 27. |
If the chosen diameter of a pipe, is less than the economical diameter |
| A. | Cost of pipe will be less |
| B. | Head loss will be high |
| C. | Cost of pumping will be more than saving |
| D. | All the above |
| Answer» E. | |