Groundwater
Flow
Wells
Solved Example: 9139-01
The soil which can store water and allow a small quantity to flow through it over a long period is called: (UPPCL JE CE Paper II 2014)
A. Aquifer
B. Aquitard
C. Aquifuge
D. Aquiclude
Correct Answer: B
Solved Example: 9139-02
The geologic formation which is neither porous nor permeable, and hence neither contains nor yields groundwater is termed as: (MP Sub Engg Civil Jul 2017 Shift II)
A. Aquiclude
B. Aquifer
C. Aquitard
D. Aquifuge
Correct Answer: D
Solved Example: 9139-03
A pollutant entered into a confined aquifer of 5 m thick and porosity 25%. If the seepage discharge through the aquifer is 0.25 m$^2$/ s, the travel time of pollutant for 100 m in the aquifer will be (in seconds): (MPPSC AE CE 2014 Paper II)
A. 20
B. 400
C. 500
D. 2000
Correct Answer: C
Solved Example: 9139-04
Dupuit's assumptions are valid for: (GATE CE 2018 Shift II)
A. Artesian aquifer
B. Confined aquifer
C. Leaky aquifer
D. Unconfined aquifer
Correct Answer: D
Solved Example: 9139-05
The discharge per unit drawdown of a well, is called: (GPSC AE CE 2017 Civil)
A. Specific storage
B. Specific yield
C. Specific capacity
D. None of the above
Correct Answer: C
Solved Example: 9139-06
A deep well: (RSMSSB JE Civil Diploma Sep 2016)
A. Is always deeper than a shallow well
B. Has more discharge than a shallow well
C. Is weaker structurally than a shallow well
D. Both (a) and (b)
Correct Answer: B
Solved Example: 9139-07
Most suitable method for drainage of fine grained soil is: (UKPSC AE Civil 2013 Paper I)
A. Well point system
B. Vacuum method
C. Electro-osmosis method
D. Deep well system
Correct Answer: C
Solved Example: 9139-08
Strainer-type tube wells are considered unsuitable for: (BPSC AE Paper VI Civil 2012)
A. Coarse gravel
B. Fine-grained strata
C. Clean gravel
D. All of the above
Correct Answer: B
Solved Example: 9139-09
Isopiestic lines are the contours: (BPSC AE Paper VI Civil 2012)
A. Drawn to represent water table
B. Drawn to represent piezometric heads
C. Drawn to represent piezometric surface
D. Drawn to represent points of equal rainfall
Correct Answer: C
Solved Example: 9139-10
A ground water basin consists of 1 km$^2$ area of plains. The maximum groundwater fluctuation has been observed to be 1.0 m. What is the available ground water storage if the specific yield of the basin is 10%? (GPSC AE CE 2020 Civil)
A. 10,000 m$^3$
B. 100,000 m$^3$
C. 1,000,000 m$^3$
D. 10,000,000 m$^3$
Correct Answer: B