Irrigation Engineering MCQ Questions & Answers

11

The uplift pressure on a dam can be controlled by
i) constructing cutoff under upstream face
ii) constructing drainage channels bet-ween the dam and its foundation
iii) by pressure grouting in foundation
The corret answer is

A) only (i) B) both (i) and (ii) C) both (i) and (iii) D) (i), (ii) and (iii)

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Answer & Solution

Answer: Option D

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12

If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be

A) 1 + 0.9°10 B) 1 - 0.9°10 C) $$\frac{1}{{1 - {{0.9}^ \circ }10}}$$ D) $$\frac{1}{{1 + {{0.9}^ \circ }10}}$$

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Answer & Solution

Answer: Option C

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13

The width of a meander belt is the transverse distance between

A) Apex point of one curve and apex point of the reserve curve B) Apex point and the crossing C) Two banks of meandering river D) None of these

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Answer & Solution

Answer: Option A

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14

Pick up the correct statement from the following:

A) Gravity water is harmful to crops B) Hygroscopic water remains attached to soil molecules by chemical bond C) Capillary moisture held in the soil pores against gravity by surface tension, is utilized by plants D) All the above

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Answer & Solution

Answer: Option C

Solution:

Gravity water is harmful to crops because it moves quickly through the soil, often beyond the root zone, and does not provide effective moisture to the plants.

Hygroscopic water remains attached to soil molecules by a chemical bond, making it unavailable for plant absorption.

Capillary moisture, held in the soil pores against gravity by surface tension, is the form of water that plants utilize for their growth and survival.

15

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

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Answer & Solution

Answer: Option C

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16

The kor depth for rice is 190 mm and kor period is 14 days. The outlet factor for this will be

A) 637 hectares/m³/sec B) 837 hectares/m³/sec C) 972 hectares/m³/sec D) 1172 hectares/m³/sec

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Answer & Solution

Answer: Option A

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17

The main function of a diversion head works of a canal from a river, is

A) To remove silt B) To control floods C) To store water D) To raise water level

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Answer & Solution

Answer: Option D

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18

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

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Answer & Solution

Answer: Option C

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19

For wave action in dams, the maximum height of freeboard is generally taken to be equal to (where hw is height of wave.)

A) 0.5 hw B) 0.75 hw C) 1.25 hw D) 1.50 hw

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Answer & Solution

Answer: Option D

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20

The intensity of irrigation means

A) Percentage of culturable commanded area to be irrigated annually B) Percentage of gross commanded area to be irrigated annually C) Percentage of the mean of culturable commanded area and the gross commanded area to be irrigated annually D) Total depth of water supplied by the number of waterings

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Answer & Solution

Answer: Option A

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Irrigation Engineering MCQ Questions & Answers | Civil Engineering