List of top Water Science and Technology Questions

Given below are two statements
Statement I: Well casings and screens are installed on the basis of well log.
Statement II: Well log is a systematic record of length of screens and casings.
In the light of the above statements, choose the most appropriate answer from the options given below:

An individual well discharging at a rate of 0.0001 m³/h would be classified as

Given below are two statements
Statement I: In surface irrigation, the advance phase is the time required for water to advance from the inlet to the outlet of the field.
Statement II: The depletion phase is the time required for water to remain on the field after the advance phase is completed.
In the light of the above statements, choose the correct answer from the options given below:

A useful thumb rule in check basin design is that the water spread in the entire check basin should cover in how much percentage of the time required to infiltrate the net depth of irrigation water?

Tile drains are usually spaced at

If a tile drainage system is laid along a length of 400 m with laterals spaced 24 m apart, and the outflow through one lateral is 8 m³/h, then the drainage coefficient will be

Given below are two statements
Statement I: Tube well in hard rock area are called bore well.
Statement II: Bore wells are generally not used for small scale irrigation.
In the light of the above statements, choose the most appropriate answer from the options given below:

If \(\eta_z =\) specific speed, \(\eta_1 =\) pump speed, \(Q =\) pump discharge, \(H =\) total head, then the mathematical expression for specific speed of a pump is:

If a centrifugal pump is discharging 450 l/min of water with 5 hp motor having efficiency 80%, then calculate the total head, will be

Given below are two statements
Statement I: Bedding system of surface drainage is best method for poorly drained soil on slope up to 1.5 per cent.
Statement II: The parallel field drain system is suitable surface drainage method for irrigated fields.
In the light of the above statements, choose the correct answer from the options given below:

If the flow rate of a 5 hp water pump is 250 l/min with a total head of 25 m, then the energy/electricity consumption of the pump will be

Which of the followings is not an irrigation scheduling instrument?

A bag contains 20 white balls and 4 red balls. One ball is drawn from the bag and it is replaced after noting its colour. In the second draw again one ball is drawn and its colour is noted and replaced. Find the probability of the event that both the balls are of different colours?

Arrange the following steps to estimate irrigation interval (days):
A. Compute the total number of irrigations over the growing season
B. Estimate gross irrigation depth
C. Calculate irrigation interval
D. Compute the irrigation water need over the total growing season
E. Estimate net irrigation depth
Choose the correct answer from the options given below:

Which of the following statements are true in case of mean deviation (MD)?
A. MD is the average of deviation taken from a central value.
B. MD is not affected much by extreme values.
C. Algebraic negative signs of the deviation are ignored.
D. MD is minimum when deviation are taken from median.
E. MD is the average of the absolute deviation taken from a central value.
Choose the most appropriate answer from the options given below:

Determine the gross irrigation requirement of the crop, if the field capacity of soil is 18 cm, water content in the root depth before irrigation is 12 cm, and peak consumptive use rate is 70 mm/day assuming the irrigation efficiency as 80%.

Given below are two statements
Statement I: Histogram is more suited for frequency distributions with continuous classes.
Statement II: In Histogram, the lower limit of a class is the upper limit of the previous class.
In the light of the above statements, choose the correct answer from the options given below:

The value of \(i^2\) (where \(i = \sqrt{-1}\)) is:

Given below are two statements
Statement I: A quadratic equation can have three distinct real roots.
Statement II: In quadratic equation \(ax^2 + bx + c = 0\), if \(b^2 - 4ac = 0\), then the quadratic equation has real and equal roots.
In the light of the above statements, choose the correct answer from the options given below:

The differentiation of the \(\sin(x^2 + 1)\) function with respect to \(x\), will be

What is the value of the determinant \(\begin{vmatrix} 1 & 2 1 & 3 \end{vmatrix}\)?

The export of mangoes in million rupees from a district during eight weeks is given below. The median values of the set will be:
21.3, 29.7, 16.6, 2.3, 14.1, 36.6, 18.7, 3.5

Which differential equation would be obtained, if the boundary layer transition from a boundary of zero thickness and the lateral inflow is zero in canal?

\(\frac{d}{dx}(\sec x) =\)

Given below are two statements
Statement I: Inverted siphon is not economical when a channel has to cross a wide depression or where road surface lies close to the field surface.
Statement II: Culverts are commonly used at channel crossing when the road fill is sufficiently high and channel bed lies on the field surface on either side.
In the light of the above statements, choose the correct answer from the options given below: