Test: Seepage Analysis - 1


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10 Questions MCQ Test GATE Civil Engineering (CE) 2023 Mock Test Series | Test: Seepage Analysis - 1

Test: Seepage Analysis - 1 for Civil Engineering (CE) 2022 is part of GATE Civil Engineering (CE) 2023 Mock Test Series preparation. The Test: Seepage Analysis - 1 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Seepage Analysis - 1 MCQs are made for Civil Engineering (CE) 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Seepage Analysis - 1 below.
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Test: Seepage Analysis - 1 - Question 1

From a flow net which of the following information can be obtained?
1. Rate of flow
2. Pore water pressure
3. Exit gradient
4. Permeability
Select the correct answer using the codes given below:

Detailed Solution for Test: Seepage Analysis - 1 - Question 1

Seepage pressures, uplift pressures, exit gradient and pore-water pressure can be obtained from a flownet.

Test: Seepage Analysis - 1 - Question 2

Which one of the following soil types is most likely to be subjected to liquefaction under seismic forces?​

Test: Seepage Analysis - 1 - Question 3

 A flownet of a coffer dam foundation has 6 flow channels and 18 equipotential drops. The head of water lost during seepage is 6 m. If the coefficient of permeability of foundation is 4 x 10-5 m/min, then the seepage loss per metre length of dam will be

Detailed Solution for Test: Seepage Analysis - 1 - Question 3

Seepage loss per metre length, 

Given, k = 4 x 10-5 m/min
= 4 x 10-5 x 24 x 60 m/day
= 0.0576 m/day
∴ 
= 0.1152 m3/day
= 11.52 x 10-2 m3/day
Nf is number of flow channels = 6.0
Nd is number of equipotential drops = 18

Test: Seepage Analysis - 1 - Question 4

Capillary rise is maximum for

Detailed Solution for Test: Seepage Analysis - 1 - Question 4


For fine grained soils effective size ‘d’ is smaller so it will experience more capillary rise.

Test: Seepage Analysis - 1 - Question 5

Water is flowing in an upward direction through a stratum of sand, 4 m thick, under a total head difference of 2 m. The sand has a specific gr. of 2.65 and void ratio of 0.065. The factor of safety against quick sand condition would be

Detailed Solution for Test: Seepage Analysis - 1 - Question 5

Test: Seepage Analysis - 1 - Question 6

For design of filter the criteria usually adopted is

Detailed Solution for Test: Seepage Analysis - 1 - Question 6

Test: Seepage Analysis - 1 - Question 7

The constant of proportionality between seepage velocity and hydraulic gradient is called

Detailed Solution for Test: Seepage Analysis - 1 - Question 7

Vs = kpi
Where, Vs = seepage velocity
kp = coeff. of percolation
Seepage Velocity = Coefficient of Percolation x Hydraulic Gradient

Test: Seepage Analysis - 1 - Question 8

In an earthen dam the phreatic line is

Test: Seepage Analysis - 1 - Question 9

The critical hydraulic gradient of a soil ic is given by
where G = specific gravity, e = void ratio

Detailed Solution for Test: Seepage Analysis - 1 - Question 9

Critical hydraulic gradient

also,

Test: Seepage Analysis - 1 - Question 10

If the permeability of soil does not depend on its mineral content but depends on orientation of particles then the void space is known as

Detailed Solution for Test: Seepage Analysis - 1 - Question 10

Micropores, often found between and within soil aggregates, are so small that surface tension holds water in place. It does not depend on mineral content rather depends on orientation of the particles. Instead of draining away, water moves through micropores only when suction is created by thirsty roots.

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