List of top Water Science and Technology Questions on Hydrology asked in ICAR AIEEA (PG)

Optimum yield of a well is arrived at by conducting a “step drawdown test” in the well. Arrange the steps in sequence for conducting a "step drawdown test" from the below statements.
A. Bore is first pumped at a very low and constant discharge rate for a fixed period of time in such a manner that the water level stabilizes at a shallow depth.
B. The pump discharge is then increased to a medium rate of pumping so that water level falls further down but eventually stabilized at an intermediate depth.
C. The pump discharge is further increased higher so that the water level again stabilizes at a lower level further down.
D. When the discharge versus steady state drawdown of the different steps is plotted, a parabolic curve is obtained.
Choose the correct answer from the options given below:

Which of the following intruments are used to measure cumulative flow of water?
A. Propeller meter
B. Elbow meter
C. Deathridge meter
D. Water meter
Choose the correct answer from the options given below

The average monsoonal rainfall of India is

As per Indian Standard IS 4987-1968 code the number of raingauges to be provided for $1000\text{ km}^2$ hilly area with heavy rainfall are}

Which of the following raingauges gives data on intensity of rainfall?

If a measuring tape was standardized at 20°C, when the temperature is above 20°C at the time of measurement, then the measured length will be:

The rate of flow of water through saturated soil is governed by:

Given below are two statements
Statement I: Saturated hydraulic conductivity is less but unsaturated hydraulic conductivity is more in sandy soil.
Statement II: Infiltration is not affected by soil surface condition but depends upon the transmission characteristics of entire soil profile.
In light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements
Statement I: Alkalinity of alkali soil depends upon relative concentration of Na2CO3, NaHCO3 and partial pressure of CO2 in soil solution.
Statement II: Ca2+ and Mg2+ ions increase the flocculation in soil by increasing zeta potential of soil exchange complex.
In light of the above statements, choose the most appropriate answer from the options given below:

Given below mineral species and their soil silicate classification
A. Tourmaline - Cyclosilicates
B. Amphiboles - Inosilicates
C. Olivine - Nesosilicates
D. Feldspar - Phyllosilicates
E. Pyroxene - Tectosilicates
Choose the correct answer from the options given below:

Which of the following vitamins is fat soluble?

Which of the following order of insects is known to cause greater damage to agricultural crops?

Estimate the peak rate of runoff from a watershed of 25 ha, having 10 ha under cultivation (C = 0.5), 5 ha under forests (C = 0.4) and 10 ha under grass cover (C = 0.45). The intensity of rainfall is 18 cm/hr.

Given below are two statements: one is labeled as Assertion A and the other is labeled as Reason R.
Assertion A: A low drainage density reflects good drainage conditions in the catchment.
Reason R: Poor conditions are observed in areas where soils are resistant to erosion.
In the light of the above statements, choose the most appropriate answer from the options given below.

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: There is change in the slope of double-mass curve of the watershed.
Reason R: Streamflow has been changed due to watershed development activities.
In light of the above statements, choose the most appropriate answer from the options given below.

Which of the following is not an objective of watershed management programme?

Given below are two statements
Statement I: Auger hole method is used to measure the hydraulic conductivity of soils above the water table
Statement II: Inverse auger hole method is used to measure the hydraulic conductivity of soils above the water table
In the light of the above statements, choose the most appropriate answer from the options given below

Precipitation that infiltrates into soils and then moves laterally through the upper soil crust to appear at the surface at some location away from the entry point is known as

For a concrete or paved surface, curve number will tend to be almost equal to

5 gm of sodium chloride is dissolved in 2 liters of water. The salt concentration in water in ppm is

The most commonly used unit for expressing the total quantity of dissolved salts present in a given water sample is

Laboratory analysis of a water sample reported the presence of following constituents \(\text{Na} = 14.8\text{ meq/l}\), \(\text{Ca} = 3.5\text{ meq/l}\), \(\text{Mg} = 4.5\text{ meq/l}\), \(\text{CO}_3 = 0.4\text{ meq/l}\), \(\text{HCO}_3 = 2.6\text{ meq/l}\). The sodium adsorption ratio of water is

A Third-order stream is formed when
A. A second-order stream joins a second-order stream
B. Two second-order streams join a third-order stream
C. A first-order stream joins a second-order stream
D. A third-order stream joins a third-order stream
Choose the correct answer from the options given below:

For Indian black soils under AMC-I conditions, the best relationships among Initial Abstraction (\(I_a\)) and the Potential Maximum Retention (\(S_m\)) is given by the popular SCS-CN method. Select the best from options given below

The peak runoff rate \(Q_p\) in \(\text{m}^3\text{/s}\) by the Ryves formula is given as \(Q_p = C_r A^b\), where A is the area in \(\text{km}^2\) and \(C_r\) is Ryves constant. The value of exponent b is