MCQOPTIONS
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MCQOPTIONS
This section includes 515 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. |
Irrigation water having the concentration of Na++ , Ca++ and Mg++ as 20, 3 and 1 Milli equivalent per litre respectively will be classified as |
| A. | low sodium water |
| B. | medium sodium water |
| C. | high sodium water |
| D. | very high sodium water |
| Answer» C. high sodium water | |
| 2. |
For supplying water to rabi crop, kharif crop and sugarcane, the channel is designed for a capacity equal to the greater of the water requirement of |
| A. | rabi or kharif |
| B. | rabi and kharif or sugarcane |
| C. | rabi and sugarcane or kharif and sugarcane |
| D. | rabi or kharif or sugarcane |
| Answer» D. rabi or kharif or sugarcane | |
| 3. |
The ratio of the quantity of water stored in the root zone of the crops to the quantity of water actually delivered in the field is known as |
| A. | water conveyance efficiency |
| B. | water application efficiency |
| C. | water use efficiency |
| D. | none of the above |
| Answer» C. water use efficiency | |
| 4. |
The amount of irrigation water required to meet the evapotranspiration needs of the crop during its full growth is called |
| A. | effective rainfall |
| B. | consumptive use |
| C. | consumptive irrigation requirement |
| D. | net irrigation requirement |
| Answer» D. net irrigation requirement | |
| 5. |
The depth of water required to bring the soil moisture content of a given soil upto its field capacity is called |
| A. | hygroscopic water |
| B. | equivalent moisture |
| C. | soil moisture deficiency |
| D. | pellicular water |
| Answer» D. pellicular water | |
| 6. |
If the intensity of rainfall is more than the infiltration capacity of soil, then the infiltration rate will be |
| A. | equal to rate of rainfall |
| B. | equal to infiltration capacity |
| C. | more than rate of rainfall |
| D. | more than infiltration capacity |
| Answer» C. more than rate of rainfall | |
| 7. |
Rate of evaporation from a water surface increases ifi) difference of vapour pressure between water and air is increasedii) velocity of wind is decreasediii) concentration of soluble solids in water is decreased The correct answer is |
| A. | (i) and (ii) |
| B. | (i) and (iii) |
| C. | (ii) and (iii) |
| D. | (i). (ii) and (iii) |
| Answer» C. (ii) and (iii) | |
| 8. |
Which of the following types of rain gauges is used for measuring rain in remote hilly inaccessible areas ? |
| A. | tipping bucket type |
| B. | weighing type |
| C. | floating type |
| D. | Simon's raingauge |
| Answer» B. weighing type | |
| 9. |
Interception losses are due toi) evaporationii) transpirationiii) stream flowThe correct answer is |
| A. | only (i) |
| B. | (i)and(ii) |
| C. | (ii) and (iii) |
| D. | (i), (ii) and (iii) |
| Answer» B. (i)and(ii) | |
| 10. |
To determine the discharge at a section in a stream from its rating curve, the required data arei) slope of water surface at the sectionii) stage at the sectioniii) current meter readings at the section The correct answer is |
| A. | (i) and (ii) |
| B. | (ii) and (iii) |
| C. | only (ii) |
| D. | only (iii) |
| Answer» D. only (iii) | |
| 11. |
Instantaneous unit hydrograph is a hydrograph ofi) unit durationii) unit rainfall excessiii) infinitely small durationiv) infinitely small rainfall excessThe correct answer is |
| A. | (i) and (ii) |
| B. | (i)and(iv) |
| C. | (ii) and (iii) |
| D. | (iii) and (iv) |
| Answer» D. (iii) and (iv) | |
| 12. |
To estimate the magnitude of a flood with a return period of T years, Gumbel's distribution method requires the following data pertaining to annual flood seriesi) mean valueii) standard deviationiii) length of recordiv) coefficient of skewThe correct answer is |
| A. | (i) and (ii) |
| B. | (i),(ii) and (iii) |
| C. | (i), (ii) and (iv) |
| D. | (i), (ii), (iii) and (iv) |
| Answer» C. (i), (ii) and (iv) | |
| 13. |
The uplift pressure on a dam can be controlled byi) constructing cutoff under upstream faceii) constructing drainage channels bet-ween the dam and its foundationiii) by pressure grouting in foundationThe corret answer is |
| A. | only (i) |
| B. | both (i) and (ii) |
| C. | both (i) and (iii) |
| D. | (i), (ii) and (iii) |
| Answer» E. | |
| 14. |
The ratio of the average load to the installed capacity of the plant whose reserve capacity is zero will be equal to |
| A. | load factor |
| B. | plant factor |
| C. | utilisation factor |
| D. | both (a) and (b) |
| Answer» E. | |
| 15. |
The forces, which are considered for the analysis of an elementary profile of a gravity dam under empty reservoir condition, arei) Water pressureii) Self weightiii) Upliftiv) Pressure due to earthquakeThe correct answer is |
| A. | Only (ii) |
| B. | (i), (ii) and (iii) |
| C. | (i), (ii) and (iv) |
| D. | (i), (ii), (iii) and (iv) |
| Answer» B. (i), (ii) and (iii) | |
| 16. |
Presence of tail water in a gravity dami) increases the principal stressii) decreases the principal stressiii) increases the shear stressiv) decreases the shear stressThe correct answer is |
| A. | (i) and (iii) |
| B. | (i)and(iv) |
| C. | (ii) and (iii) |
| D. | (ii) and (iv) |
| Answer» E. | |
| 17. |
The most suitable material for the central impervious core of a zoned embankment type dam is |
| A. | clay |
| B. | coarse sand |
| C. | silty clay |
| D. | clay mixed with fine sand |
| Answer» E. | |
| 18. |
If the R.L's of canal bed level and high flood level of drainage are 212.0 m and 210.0 m respectively, then cross drainage work will be |
| A. | aqueduct |
| B. | superpassage |
| C. | syphon |
| D. | syphon aqueduct |
| Answer» D. syphon aqueduct | |
| 19. |
The drainage water intercepting the canal can be disposed of by passing the canal below the drainage in |
| A. | aqueduct and syphon aqueduct |
| B. | aqueduct and super passage |
| C. | super passage and canal syphon |
| D. | level crossing |
| Answer» D. level crossing | |
| 20. |
Which of the following canal structures is used to remove surplus water from an irrigation channel into a natural drain ? |
| A. | canal fall |
| B. | canal outlet |
| C. | canal escape |
| D. | canal regulator |
| Answer» D. canal regulator | |
| 21. |
The ratio of rate of change of the discharge of an outlet to the rate of change of the discharge of distributing channel is called |
| A. | proportionality |
| B. | flexibility |
| C. | setting |
| D. | sensitivity |
| Answer» C. setting | |
| 22. |
If D is the depth of scour below original bed, then the width of launching apron is generally taken as |
| A. | 1.2 D |
| B. | 1.5 D |
| C. | 2.0 D |
| D. | 2.5 D |
| Answer» C. 2.0 D | |
| 23. |
The ratio of average values of shear stresses produced on the bed and the banks of a channel due to flowing water is |
| A. | less than 1 |
| B. | equal to 1 |
| C. | greater than 1 |
| D. | equal to zero |
| Answer» D. equal to zero | |
| 24. |
The net head under which the turbine reaches its peak efficiency at synchronous speed is called |
| A. | design head |
| B. | rated head |
| C. | gross head |
| D. | operating head |
| Answer» B. rated head | |
| 25. |
Generally the weir is aligned at right angles to the direction of the main river current because |
| A. | it ensures less length of the weir |
| B. | it gives better discharging capacity |
| C. | it is economical |
| D. | all of the above |
| Answer» E. | |
| 26. |
If it rains between 2 P.M. and 3 P.M. and the entire basin area just starts contributing water at 3 P.M. to the outlet, then time of concentration will be |
| A. | 15 minutes |
| B. | 20 minutes |
| C. | 30 minutes |
| D. | 60 minutes |
| Answer» E. | |
| 27. |
If d is the depth of the aquifer through which water is flowing, then the relationship between permeability k and transmissible T is given by |
| A. | T = kd |
| B. | T = k/d |
| C. | T= Vkd |
| D. | k= VTd |
| Answer» B. T = k/d | |
| 28. |
The minimum size of stone that will remain at rest in a channel of longitudinal slope S and hydraulic mean depth R is given by |
| A. | 4RS |
| B. | 11 RS |
| C. | 7RS |
| D. | 15 RS |
| Answer» C. 7RS | |
| 29. |
The unit hydrograph of a specified duration can be used to evaluate the hydrograph of storms of |
| A. | same duration only |
| B. | same and shorter duration |
| C. | same and longer duration |
| D. | any duration |
| Answer» E. | |
| 30. |
The unit hydrograph due to a storm may be obtained by dividing the ordinates of the direct runoff hydrograph by |
| A. | direct runoff volume |
| B. | period of storm |
| C. | total rainfall |
| D. | none of the above |
| Answer» B. period of storm | |
| 31. |
As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at |
| A. | lower level |
| B. | higher level |
| C. | same level |
| D. | any of the above depending on the design |
| Answer» B. higher level | |
| 32. |
The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are |
| A. | at right angle and parallel to weir crest |
| B. | parallel and at right angle to weir crest |
| C. | parallel to weir crest in both |
| D. | at right angle to weir crest in both |
| Answer» B. parallel and at right angle to weir crest | |
| 33. |
Study the following statements.i) Levees are constructed parallel to river flow,ii) Spurs are constructed parallel to river flow,iii) Levees are constructed transverse to river flow,iv) Spurs are constructed transverse to river flow.The correct answer is |
| A. | (i) and (ii) |
| B. | (i) and (iv) |
| C. | (ii) and (iii) |
| D. | (iii) and (iv) |
| Answer» C. (ii) and (iii) | |
| 34. |
Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas.Reason R : Rainfall gradient is steep.Select your correct answer according to the coding system given below : |
| A. | Both A and R are true and R is the correct explanation of A |
| B. | Both A and R are true but R is not the correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» B. Both A and R are true but R is not the correct explanation of A | |
| 35. |
Variability of rainfall isi) largest in regions of high rainfallii) largest in coastal areasiii) largest in regions of scanty rainfallThe correct answer is |
| A. | only (i) |
| B. | (i) and (ii) |
| C. | only (iii) |
| D. | (ii) and (iii) |
| Answer» D. (ii) and (iii) | |
| 36. |
The most suitable chemical which can be applied to the water surface for reducing evaporation is |
| A. | methyl alcohol |
| B. | ethyl alcohol |
| C. | cetyl alcohol |
| D. | butyl alcohol |
| Answer» D. butyl alcohol | |
| 37. |
When the upstream face of a gravity dam is vertical, then the intensity of water pressure at the water surface and at the base respectively will be (where w is unit weight of water and H is the depth of water.) |
| A. | 0 and wH212 |
| B. | wH2/2and wH2/3 |
| C. | wH and 0 |
| D. | OandwII |
| Answer» E. | |
| 38. |
Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation ? |
| A. | flat water surface |
| B. | convex water surface |
| C. | concave water surface |
| D. | independent of shape of water surface |
| Answer» C. concave water surface | |
| 39. |
According to Khosla's theory, the exit gradient in the absence of a downstream cutoff is |
| A. | 0 |
| B. | unity |
| C. | infinity |
| D. | very large |
| Answer» D. very large | |
| 40. |
A runoff river plant |
| A. | is a medium head scheme |
| B. | generates power during peak hours only |
| C. | is suitable only on a perennial river |
| D. | has no pondage at all |
| Answer» D. has no pondage at all | |
| 41. |
To determine the discharge at a section in a stream from its rating curve, the required data arei) slope of water surface at the sectionii) stage at the section iii) current meter readings at the section The correct answer is |
| A. | (i) and (ii) |
| B. | (ii) and (iii) |
| C. | only (ii) |
| D. | only (iii) |
| Answer» D. only (iii) | |
| 42. |
The drainage water intercepting the canal can be disposed of by passing the canal below thedrainage in |
| A. | aqueduct and syphon aqueduct |
| B. | aqueduct and super passage |
| C. | super passage and canal syphon |
| D. | level crossing |
| Answer» D. level crossing | |
| 43. |
In India, which of the following is adopted as standard recording raingauge ? |
| A. | Symon's raingauge |
| B. | tipping bucket type |
| C. | natural syphon type |
| D. | weighing bucket type |
| Answer» D. weighing bucket type | |
| 44. |
If the R.L's of canal bed level and high flood level of drainage are 212.0 m and 210.0 mrespectively, then cross drainage work will be |
| A. | aqueduct |
| B. | superpassage |
| C. | syphon |
| D. | syphon aqueduct |
| Answer» D. syphon aqueduct | |
| 45. |
The amount of irrigation water required to meet the evapotranspiration needs of the cropduring its full growth is called |
| A. | effective rainfall |
| B. | consumptive use |
| C. | consumptive irrigation requirement |
| D. | net irrigation requirement |
| Answer» D. net irrigation requirement | |
| 46. |
The ratio of the average load to the installed capacity of the plant whose reserve capacity iszero will be equal to |
| A. | load factor |
| B. | plant factor |
| C. | utilisation factor |
| D. | both (a) and (b) |
| Answer» E. | |
| 47. |
Which of the following canal structures is used to remove surplus water from an irrigationchannel into a natural drain ? |
| A. | canal fall |
| B. | canal outlet |
| C. | canal escape |
| D. | canal regulator |
| Answer» D. canal regulator | |
| 48. |
The unit hydrograph due to a storm may be obtained by dividing the ordinates of the directrunoff hydrograph by |
| A. | direct runoff volume |
| B. | period of storm |
| C. | total rainfall |
| D. | none of the above |
| Answer» B. period of storm | |
| 49. |
A 6 hours storm had 4 cm of rainfall and the resulting runoff was 2 cm. If |
| A. | 4.5 cm |
| B. | 6.0 cm |
| C. | 7.5 cm |
| D. | 9.0 cm |
| Answer» C. 7.5 cm | |
| 50. |
A repelling groyne is aligned |
| A. | pointing upstream |
| B. | pointing downstream |
| C. | perpendicular to bank |
| D. | parallel to bank |
| Answer» B. pointing downstream | |