A mean annual runoff 2 m3/s from a catchment of area 10km2 represents an effective rainfall of nearly:

1.  530 cm

2.  590 cm

3.  630 cm

4.  658 cm

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4
Correct Answer :

630 cm


Explanation :
No Explanation available for this question

Steep rise in the flow-mass curve during a certain period indicates:

1.  Very high evaporation losses during that period

2.  Flash floods during that period

3.  Sudden spurt in irrigation demand during that period

4.  Sudden rise in demand for water to meet hydropower generation.

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4
Correct Answer :

Flash floods during that period


Explanation :
No Explanation available for this question

A rise crop is to be irrigated in a field covering an area of 2400 ha, the duty and base period of rice are given as 860 ha/cumec and 120 days respectively. The volume of water required in the field is nearly:

1.  500 ha-m

2.  1400 ha-m

3.  2000 ha-m

4.  2880 ha-m

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4
Correct Answer :

2880 ha-m


Explanation :
No Explanation available for this question

In an irrigation project, in a certain year, 70% and 46% of the cultural command area in Kharif and Rabi, respectively, remained without water and rest of the area got irrigation water. The intensity of irrigation in that year for the project was:

1.  116%

2.  84%

3.  42%

4.  58%

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4
Correct Answer :

84\%


Explanation :
No Explanation available for this question

The gross command area for a distributary is 5000 hectares, 80% of which is cultural irrigable. The intensity of irrigation for Rabi is 50% and for Kharif is 30%. The average duty at the head of the distributary is 2000 hectares/ cumec for Rabi season and 900 hectares/cumec for Kharif season. The discharge required at the head of the distributary from average demand considerations is:

1.  1.00 cumecs

2.  1.33 cumecs

3.  2.33 cumecs

4.  3.33 cumecs

View Answer  
4
Correct Answer :

1.33 cumecs


Explanation :
No Explanation available for this question

Due to continuous pumping for 7hrs from a catchment of 25 ha, having porosity of 30% and specific retention of 10%, groundwater level dropped by 1m. The corresponding change in storage is:

1.  7.5 ha-m

2.  0.75 ha-m

3.  1.87 ha-m

4.  0.187 ha-m

View Answer  
4
Correct Answer :

0.187 ha-m


Explanation :
No Explanation available for this question

As recommended by Sichardt, the radius of influence is :

1.  Inversely proportional to drawdown

2.  Linearly proportional to drawdown

3.  Independent of drawdown

4.  Proportional to square root of drawdown

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4
Correct Answer :

Linearly proportional to drawdown


Explanation :
No Explanation available for this question

Consider the following statements: 1. A regime channel will have side slopes of value 0.5H : 1V. 2. Lacey’s regime formula is applicable to regime channels with sediment concentration more than 5000 ppm. 3. For a Lacey regime channel the Manning roughness coefficient is estimated by Strickler’s formula 4. The mean velocity in a Lacey channel is proportional to R2/3. Where R = hydraulic radius. Which of these statements are correct

1.  1 and 2

2.  1 and 4

3.  2 and 3

4.  3 and 4

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4
Correct Answer :

1 and 4


Explanation :
No Explanation available for this question

The minimum size of gravel that will not move in the bed of a wide rectangular channel of depth 0.8 m and longitudinal slope 0.0041 is:

1.  11 mm

2.  23 mm

3.  36 mm

4.  57 mm

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4
Correct Answer :

36 mm


Explanation :
No Explanation available for this question

The flip bucket energy dissipater for a spillway is suitable where: 1. The tail water depth is low 2. The rock on the downstream is fragile and is erodible 3. The rock on the downstream is good and non-erodible

1.  1, 2 and 3

2.  1 and 2 only

3.  2 and 3 only

4.  1 and 3 only

View Answer  
4
Correct Answer :

1 and 2 only


Explanation :
No Explanation available for this question
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