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ISRO CE Quiz 2- Irrigation

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Question 1

Consider the following statements:
Irrigation water has to be supplied to the crops when the moisture level falls
1). below field level capacity
2). below OMC 
3). below wilting point
Which of these statements is/are correct?

Question 2

During a particular stage of the growth of a crop consumptive use of water is 2.8 mm/day. If the amount of water available in the soil is 25% of 80mm depth of water(OMC), what is the frequency of irrigation?

Question 3

A lift irrigation scheme using a discharge of 96 m3/hr is planned to raise a crop with an average Δ of 0.375 m. Intensity of irrigation is 60%. Assuming 3600 hours of working of the tubewell for a years, the culturable command area is

Question 4

In lacey’s regime theory, the velocity of flow is proportional to

Question 5

Which one of the following is the purpose of proving the downstream sheet pile in a barrage?

Question 6

The flip bucket energy dissipater for a spillways 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.

Question 7

The time required to irrigate a strip of area 0.203 hectare by a stream discharge of 0.043 cumecs, to provide an average depth of 6.35 cm to the field is __________min.
[Assume average rate of infiltration to be 5 cm/h]

Question 8

A bore is a hydraulic jump which propagates into a still or slower moving fluid as shown in the figure below. Assume that the still water is 2 m deep and the water behind the bore is 3 m deep. What will be the induced water velocity (in m/s)?
Description: E:\Gate\SSC JE Civil Part 1-Done\04_FM_BLok_files\image166.png

Question 9

A weir on a permeable foundation with downstream sheet pile of the depth 8 m. The height of weir is 10 m, the height of water is 8.6 m and length of floor is 10 m. The exit gradient as per Khosla's method is

Question 10

If a bridge is designed for a 50 year flood, then the probability that only one flood of the design capacity or higher will occur in the 75 years life of the bridge is …………..
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May 12ESE & GATE CE