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irrigation free mcqs

Hydrology & Irrigation| MCQ – 06 | 20 MCQs

Posted on March 4, 2022March 17, 2023 By Civil Vedant

Q.1) Which of the following methods of applying water may be used on rolling land?

A) Border flooding

B) Check flooding

C) Furrow flooding

D) Free flooding

Answer

Option (A)

Q.2) With the increase in the quantity of water supplied, the yield of most crops :

A) Increases continuously

B) Decreases continuously

C) Increases upto a certain limit and then becomes constant

D) Increases upto a certain limit and then decreases

Answer

Option (D)

Q.3) The depth of water required to bring the soil moisture content of a given soil upto its field capacity is called :

A) Hygroscopic water

B) Equivalent moisture

C) Soil moisture deficiency

D) Pellicular water

Answer

Option (C)

Q.4) A 70% index of wetness means :

A) Rain excess of 30%

B) Rain deficiency of 30%

C) Rain deficiency of 70%

D) None of the above

Answer

Option (B)

Q.5) The useful storage is the volume of water stored in the reservoir between :

A) Minimum pool level and maximum pool level

B) Minimum pool level and normal pool level

C) Normal pool level and maximum pool level

D) River bed and minimum pool level

Answer

Option (B)

Q.6) The uplift pressure on the face of a drainage gallery in a dam is taken as :

A) Hydrostatic pressure at toe

B) Average of hydrostatic pressure at toe and heel

C) Two-third of hydrostatic pressure at toe plus one-third of hydrostatic pressure at heel

D) None of the above

Answer

Option (C)

Q.7) Seepage through embankments in an earthen dam is controlled by :

A) Drainage filters

B) Relief walls

C) Drain trenches

D) Provision of downstream berms

Answer

Option (C)

Q.8) In case of non-availability of space due to topography, the most suitable spillway is :

A) Straight drop spillway

B) Shaft spillway

C) Chute spillway

D) Ogee spillway

Answer

Option (B)

Q.9) A water shed canal :

A) Irrigates only on one side

B) Is most suitable in hilly areas

C) Avoids the cross drainage works

D) Is generally aligned parallel to the contours of the area

Answer

Option (C)

Q.10) The main cause of meandering is :

A) Presence of an excessive bed slope in the river

B) Degradation

C) The extra turbulence generated by the excess of river sediment during floods

D) None of the above

Answer

Option (C)

Q.11) Lining of irrigation canals :

A) Increases the waterlogging area

B) Decreases the waterlogging area

C) Does not change the water logging area

D) None of the above

Answer

Option (B)

Q.12) Due to decrease in pressure, the water level in a well penetrating a confined aquifer will :

A) Decrease

B) Increase

C) No change

D) None of the above

Answer

Option (B)

Q.13) Percentage of rain gauge stations which should be equipped with self recording gauges for knowing the intensity rainfall should be about :

A) 5%

B) 10%

C) 15%

D) 20%

Answer

Option (B)

Q.14) In a siphon aqueduct the most severe condition of uplift on the floor occurs when :

A) Canal runs full, drain is dry but the water table is at stream bed

B) Canal is dry and drain is at high flood level

C) Canal runs dry and the drain also runs dry

D) Both the canal and drain run full

Answer

Option (B)

Q.15) For the upstream slope of an earth dam, the most critical condition is :

A) Sudden drawdown condition

B) Steady seepage condition

C) Neither sudden drawdown nor steady seepage condition

D) During construction when the reservoir is allowed to be filled

Answer

Option (A)

Q.16) The DAD (Depth Area Duration) analysis for a catchment would indicate that :

A) For a given storm, the maximum depth increases with area

B) For a given area, the maximum average depth of rainfall increases with storm duration

C) For a given area, the maximum average depth of rainfall decreases with storm duration

D) None of the above

Answer

Option (B)

Q.17) Permanent wilting point is :

A) A characteristic of the plant

B) A soil characteristic

C) A soil characteristic modified by the crop

D) Dependent on soil water plant fertilizer interaction

Answer

Option (B)

Q.18) Which one of the following constitutes the basic assumption of unit-hydrograph theory?

A) Non-linear response and time invariance

B) Non-linear time variance and linear response

C) Linear response and linear time variance

D) Time invariance and linear response

Answer

Option (D)

Q.19) A tropical cyclone in the northern hemisphere is a zone of :

A) Low pressure with clockwise wind

B) Low pressure with anticlockwise wind

C) High pressure with clockwise wind

D) High pressure with anticlockwise wind

Answer

Option (B)

Q.20) A pumped storage plant is a :

A) High head plant

B) Run-off river plant

C) Peak load plant

D) Base load plant

Answer

Option (C)

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