Irrigation Engineering (3170609) MCQs

MCQs of WATERLOGGING

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1.

 A land is said to be water-logged when _______________

(a)

the aeration is stopped in the root zone due to the rise in water content
(b)

there is a reduction in crop yield
(c)

there is an accumulation of alkali salts in the root zone of the crop
(d)

there is salinity in the soil
Answer:

Option (a)

2.

What is the pH range for strongly alkaline soils?

(a)

7.4 – 7.8
(b)

7.9 – 8.4
(c)

 8.5 – 9.0
(d)

 > 9
Answer:

Option (c)

3.

Presence of excessive moisture retards the bacterial activities affecting crop growth.

(a)

 True
(b)

False
Answer:

Option (a)

4.

Which of the following statement is wrong?

(a)

Seepage drains reduce the chances of water-logging
(b)

 Untimely maturity of the crops is the characteristic of water-logged lands
(c)

The percolation loss can be reduced by keeping the intensity of irrigation low
(d)

 There is no way to keep a watch over the problem of water-logging
Answer:

Option (d)

5.

Swampy land is ________

(a)

 ill-aerated land
(b)

 the land where cultivation operations are impossible
(c)

 land having deposition of alkali salts in the root zone of the crops
(d)

 saline land
Answer:

Option (b)

6.

Salinity increases the osmotic activity of the plants.

(a)

True
(b)

False
Answer:

Option (b)

7.

Which of the following is a remedial measure for water-logging?

(a)

Controlling seepage from the canals
(b)

By lowering the F.S.L of the canals
(c)

Quick disposal of rainwater
(d)

Installation of lift irrigation systems
Answer:

Option (d)

8.

 Which of the following factor do not contribute to water-logging?

(a)

Inadequate drainage
(b)

Seepage from unlined canals
(c)

Frequent flooding
(d)

Excessive tapping of groundwater
Answer:

Option (d)

9.

What type of system does the diagram represent?

irrigation-engineering-questions-answers-surface-drainage-open-drainage-q8

(a)

Drains
(b)

French Drain
(c)

Deep Surface Drain System
(d)

Random Field Drain System
Answer:

Option (d)

10.

Which type of open drains would be fully operative only in rainy season?

(a)

shallow Surface Drains
(b)

Deep Surface Drains
(c)

French Drain
(d)

 Drains
Answer:

Option (b)

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