Water Resources Engineering problems
- 1. In estimating the rate of evaporation from the reservoir surface, a pan 1.5 metres in diameter, was filled upto 8.0 cm. During a specified period of time, the rainfall recorded was 5 cm. 3 cm of water was removed from the pan to keep the depth of water. At the end of the time, the depth was 9 cm. If the pan coefficient is 0.6, the evaporation loss is
Options- A. 2 mm
- B. 4 mm
- C. 6 mm
- D. 6 mm. Discuss
Correct Answer: 6 mm
- 2. If the slope of a line for infiltration capacity curve is
, the value of constant k in Horton's equation of infiltration capacity curve, is
Options- A. 2.0
- B. 2.5
- C. 3.0
- D. 3.5
- E. 4.0. Discuss
Correct Answer: 4.0.
- 3. The radius of influence is
Options- A. radius of the main well
- B. distance from the wall of main well to the point of zero draw down
- C. distance from the centre of main well to the point of zero draw down
- D. none of these. Discuss
Correct Answer: distance from the centre of main well to the point of zero draw down
- 4. The respective storm totals at three surrounding stations A, B and C are 110, 90 and 70 mm. If the normal annual precipitation amounts at stations X, A, B and C are respectively 1000, 1100, 1200 and 1250 mm, the estimated storm precipitation at X is
Options- A. 75 mm
- B. 77 mm
- C. 79 mm
- D. 81 mm. Discuss
Correct Answer: 77 mm
- 5. Sharp crested weirs are generally used
Options- A. for large flows
- B. for small flows
- C. for streams carrying high sediment loads
- D. for rivers carrying floating debris
- E. none of these. Discuss
Correct Answer: for large flows
- 6. The area of a drainage basin whose axial length is 100 km is 2500 sq. km. Its form factor is
Options- A. 0.10
- B. 0.20
- C. 0.25
- D. 0.30
- E. 0.35 Discuss
Correct Answer: 0.25
- 7. Pick up the correct statement from the following :
Options- A. The unit hydrograph of a specified unit duration obtained from the past data can be used to obtain the hydrograph of future storms of like duration
- B. To obtain the ordinates of storm hydrograph, the ordinates of unit hydrograph are multiplied by the multiplying factor
- C. The multiplying factor for storm hydrograph may be obtained by dividing the run off in mm by 25 mm
- D. A tolerance of about 25% of specified duration of unit hydrograph may be accepted without any serious error
- E. All the above. Discuss
Correct Answer: All the above.
- 8. Pick up the correct statement from the following :
Options- A. The ratio of total volume of voids in soil aggregates to the total volume of aggregate, is called Porosity
- B. Water retained by the interstices due to molecular attraction, is called pellicular water
- C. The ratio of volume of water obtained by gravity drainage to the total volume of the materials drained, is called 'yield'
- D. Sum of the percentage of specific yield and specific retention is 100
- E. All the above. Discuss
Correct Answer: All the above.
- 9. The form factor of a drainage basin is obtained by dividing
Options- A. area of the basin by the axial length
- B. average width of the basin by the axial basin
- C. area of the basin by the square of the axial length
- D. both (a) an (b)
- E. both (b) and (c). Discuss
Correct Answer: both (b) and (c).
- 10. The specifications of most commonly used standard gauges in India, are
Options- A. 200 sq. cm collector and 4 litres bottle
- B. 100 sq. cm collector and 2 litres bottle
- C. 200 sq. cm collector and 10 litres bottle
- D. 100 sq. cm collector and 4 litres bottle. Discuss
Correct Answer: 200 sq. cm collector and 4 litres bottle
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