Test: Irrigation

# Test: Irrigation - Civil Engineering (CE)

Test Description

## 25 Questions MCQ Test GATE Civil Engineering (CE) 2023 Mock Test Series - Test: Irrigation

Test: Irrigation for Civil Engineering (CE) 2023 is part of GATE Civil Engineering (CE) 2023 Mock Test Series preparation. The Test: Irrigation questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Irrigation MCQs are made for Civil Engineering (CE) 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Irrigation below.
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*Answer can only contain numeric values
Test: Irrigation - Question 1

### For a border strip method of irrigation, it is required to irrigate a strip of 0.04 Ha area from a tube well with a discharge of 0.02 cumec. The infilteration capacity of the soil may be taken as 5cm/hr. Calculate the maximum area that can be irrigated from this tubewell. (in Ha) (Important - Enter only the numerical value in the answer)

Detailed Solution for Test: Irrigation - Question 1

Test: Irrigation - Question 2

### During a particular stage of the growth of a crop, consumptive use of water is 28 mm/day. If the amount of water available in the soil is 25% of 80 mm depth of water, what is the frequency of irrigation?

Detailed Solution for Test: Irrigation - Question 2

Water available to the soil

= 80 – 20 = 60 mm

Frequency of irrigation

Thus the crop should be irrigated after every 21 days.

Test: Irrigation - Question 3

### In a canal irrigation project, 76% of the culturable command area (CCA) remained without water during kharif season and 58% of CCA remained without water during Rabi season in a particular year, Rest of the area got irrigated in each crop , respectively. What is the intensity of irrigation for the project in the year?

Detailed Solution for Test: Irrigation - Question 3

Area irrigated under Rabi = 42%
Area irrigated under Kharif = 24%
Intensity of irrigation =66%

Test: Irrigation - Question 4

The wave height , in meters , generated on the surface of a reservoir, having a fetch Length F=30km , due to wind blowing on the surface of the reservoir at a velocity of 30 km/hr is :

Detailed Solution for Test: Irrigation - Question 4

Test: Irrigation - Question 5

If the discharge required for different crops is 0.4 cumecs in the field and the capacity factor and time factors are 0.8 and 0.5 respectively. Then what is the design discharge of the distributary at its head?

Detailed Solution for Test: Irrigation - Question 5

Test: Irrigation - Question 6

Determine the watering interval for field which can be irrigated using surface method of irrigation with a source of water having a discharge of 1000 liters / minutes. The available moisture holding capacity of the soil is 180mm per meter and depth of root zone is 1.1m. Irrigation is done when 40% of the available moisture is used. The total losses during irrigation are  35% and peak daily moisture use is 4.5mm _______

Detailed Solution for Test: Irrigation - Question 6

*Answer can only contain numeric values
Test: Irrigation - Question 7

Determine the net depth of irrigation required to irrigate the field 1000 m long and 10 m wide from a source supplying water at the rate of 30000 liters / hr in clay loam soil in moderate climate. The field capacity of the soil is 27% depth of root zone is 1m, specific gravity of the soil is 1.35 and irrigation is started when 50% of
the available moisture has been used _______ mm

(Important - Enter only the numerical value in the answer)

Detailed Solution for Test: Irrigation - Question 7

Test: Irrigation - Question 8

With the increase in quantity of water supplied the yield of most crops :

Test: Irrigation - Question 9

According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is

Test: Irrigation - Question 10

For a 1m depth of flow in a canal with CVR equal to 0.9, according to Kennedy's theory the velocity of flow will be :

Detailed Solution for Test: Irrigation - Question 10

*Answer can only contain numeric values
Test: Irrigation - Question 11

A sandy loam soil holds water at 180 mm/m depth between field capacity and Permanent Witting point. The root zone depth of the crop is 80cm and allowable depletion of water is 34%. The area to be irrigated is 60Ha and water can be delivered at 28Lps. The surface irrgation application efficiency is 40%. Calculate the
time required (in Hrs) to irrigate 4Ha plot?

(Important - Enter only the numerical value in the answer)

Detailed Solution for Test: Irrigation - Question 11

Test: Irrigation - Question 12

For border strip method of irrigation determine the time required to irrigate a strip of land of 0.08 Ha in area from a tube well  with a discharge of 0.02 cumec. The infilteration capacity of the soil may be taken as 6cm/hr and the average depth of flow on the field as 10cm.

Detailed Solution for Test: Irrigation - Question 12

Test: Irrigation - Question 13

What is the regime scour depth for a channel in soil with silt factor of unity and carrying 8 m2/s of discharge intensity in accordance with Lacey’s regime theory?

Detailed Solution for Test: Irrigation - Question 13

Regime scour depth

Test: Irrigation - Question 14

A soil sample has an exchangeable sodium percentage of 16% , its electrical conductivity is 3.2 millimhos/cm and pH of 9.5. How is the soil classified?

Detailed Solution for Test: Irrigation - Question 14

In case of alkaline soil ESP > 15 and pH lies in range 8.5 - 10.0

Test: Irrigation - Question 15

The total number of independent equations that form the Lacey regime theory is :

Test: Irrigation - Question 16

A canal was designed to supply the irrigation needs of 1200 hectares to land growing rice of 140 days base period having a Delta of 134cms. If this canal water is used to irrigate wheat of base period 120 days having a Delta of 52 cm, the area (in Hectares) that can be irrigated is

Detailed Solution for Test: Irrigation - Question 16

Test: Irrigation - Question 17

Garret’s diagram is used to :

Test: Irrigation - Question 18

Water flowing at a rate of 10 m3/s is diverted to a 32 Ha field for 4h. Soil probing often irrigation showed that  0.3m of water had been stored in the root zone. Water application efficiency in this case would be :

Detailed Solution for Test: Irrigation - Question 18

Test: Irrigation - Question 19

Sodium Adsorption Ratio is expressed as :

Test: Irrigation - Question 20

The width of a dowla is generally kept between 30 to 60 cm and its height above the road level should invariably be more than

*Answer can only contain numeric values
Test: Irrigation - Question 21

A water course commands an irrigated are 1000 hectares. The intensity of irrigation of rice in this area is 70%. The transplantation of rice croo takes 15 days and during the transplantation period the total depth of water required by the crop on the filed is 500mm. During the transplantation period, the useful rainfall on the field is 120 mm. Find the duty of irrigation water for the crop at the head of water course assuming losses of water to be 20% in the water course _____ hectares/ cumec

Detailed Solution for Test: Irrigation - Question 21

Depth of water required on the field during transplantation = 500 mm

Useful rainfall during this period = 120 mm

Depth of water required to be supplied by the water Course

*Answer can only contain numeric values
Test: Irrigation - Question 22

The field capacity of a certain soil is 12.6% and specific gravity is 1.42. If the moisture content present in the soil before irrigation is 8.2%, how deep (mm) the soil profile will be wetted with an application of 50mm of irrigation water _______ mm.

(Important - Enter only the numerical value in the answer)

Detailed Solution for Test: Irrigation - Question 22

Test: Irrigation - Question 23

Borrow pits should preferably be located in

Test: Irrigation - Question 24

Lacey's regime scour depth is given by :

Where q is the discharge per unit width and f is the silt factor

Test: Irrigation - Question 25

Wetted perimeter of a regime channel for a discharge of 64 cumec as per Lacey's theory will be :

Detailed Solution for Test: Irrigation - Question 25

## GATE Civil Engineering (CE) 2023 Mock Test Series

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## GATE Civil Engineering (CE) 2023 Mock Test Series

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