Irrigation Water Conveyance and Application Methods - Irrigation and Drainage Engineering - Agricultural Engineering Previous Year Questions

1

2007 · Agricultural Engineering · Irrigation and Drainage Engineering · Irrigation Water Conveyance and Application Methods

Agricultural Engineering (AG) 2007

The discharge through a 90° V-notch for a head of 0.5 m and coefficient of discharge of 0.6 is

A

0.25 m³ s⁻¹

B

0.50 m³ s⁻¹

C

0.65 m³ s⁻¹

D

0.75 m³ s⁻¹

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2

2008 · Agricultural Engineering · Irrigation and Drainage Engineering · Irrigation Water Conveyance and Application Methods

Agricultural Engineering (AG) 2008

A flow of 150 L s⁻¹ was supplied for 8 hours from a tank to irrigate 2 ha of land. It was found that the actual delivery rate at the farm was less than 150 L s⁻¹. If the conveyance loss was 864 m³ and percolation and runoff losses in the field were 240 and 760 m³ respectively, the water application efficiency of this system is

A

80%

B

61%

C

77%

D

71%

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3

2009 · Agricultural Engineering · Irrigation and Drainage Engineering · Irrigation Water Conveyance and Application Methods

Agricultural Engineering (AG) 2009

A venturimeter of 75 mm diameter is fitted to a horizontal pipe of 150 mm diameter. Gauge pressure in the venturimeter in case of no flow is 2 m of water. Taking atmospheric pressure as 10 m of water, the theoretical flow through the pipeline in litres per second, when the throat point pressure is 2.60 m of water (absolute), is

A

15

B

30

C

60

D

75

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4

2010 · Agricultural Engineering · Irrigation and Drainage Engineering · Irrigation Water Conveyance and Application Methods

Agricultural Engineering (AG) 2010

A cross regulator is usually provided

A

at the head of the off-taking channel

B

in the main channel upstream of the off-taking channel

C

in the main channel downstream of the off-taking channel

D

in the watercourse to regulate the outlets

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5

2010 · Agricultural Engineering · Irrigation and Drainage Engineering · Irrigation Water Conveyance and Application Methods

Agricultural Engineering (AG) 2010

The Local Apparent Time (LAT) corresponding to 14 h 30' Indian Standard Time (IST) at a place in India (19° 07' N, 72° 51' E) in the month of April with a time correction of zero min will be

A

13 h 51' 24"

B

14 h 9' 39"

C

14 h 30'

D

15 h 8' 36"

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6

2013 · Agricultural Engineering · Irrigation and Drainage Engineering · Irrigation Water Conveyance and Application Methods

Agricultural Engineering (AG) 2013

During land leveling of agricultural land for irrigation and drainage purposes, the acceptable deviation in elevation from the design value in metre is

A

0.015

B

0.025

C

0.055

D

0.150

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7

2013 · Agricultural Engineering · Irrigation and Drainage Engineering · Irrigation Water Conveyance and Application Methods

Agricultural Engineering (AG) 2013

Pan evaporation data recorded at a certain location over a period of one week are 4.0, 4.3, 4.6, 4.9, 5.12, 5.18, and 6.21 mm. If irrigation scheduling based on ratio of irrigation water (IW) to cumulative pan evaporation (CPE) is practiced, the depth of irrigation at an interval of a week for IW/CPE = 0.9 is

A

3.60

B

4.41

C

5.59

D

30.88

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8

2026 · Agricultural Engineering · Irrigation and Drainage Engineering · Irrigation Water Conveyance and Application Methods

Agricultural Engineering (AG) 2026

A tubewell operating 10 hours per day discharges water at a rate of 25 m³ h⁻¹. The average irrigation depth is 80 mm, and irrigation interval is 20 days. If intensity of irrigation is 80%, the culturable command area (in hectares) is _____. (Rounded off to two decimal places)

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9

2026 · Agricultural Engineering · Irrigation and Drainage Engineering · Irrigation Water Conveyance and Application Methods

Agricultural Engineering (AG) 2026

Two rectangular channels, A and B, join to form a large rectangular channel, C. Each rectangular channel is lined with the same material and has the same bottom slope. The bottom widths of Channels A and B are 2 m and 1 m, respectively. If the flow depth in each channel is 2 m, the bottom width of Channel C (in m) is _____. (Rounded off to two decimal places)

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10

2026 · Agricultural Engineering · Irrigation and Drainage Engineering · Irrigation Water Conveyance and Application Methods

Agricultural Engineering (AG) 2026

Uniformity of irrigation is checked in a border strip by measuring water penetration depth at 16 equally spaced stations along a border strip. The depths of penetration of water recorded in mm are as follows:
0.65, 0.83, 0.79, 0.87,
0.67, 0.85, 0.86, 0.68,
0.88, 0.77, 0.73, 0.59,
0.89, 0.63, 0.72, 0.70
The distribution uniformity low-quarter (DULQ) (in fraction) is _____. (Rounded off to two decimal places)

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