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Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1


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10 Questions MCQ Test GATE Civil Engineering (CE) 2023 Mock Test Series | Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1

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

When seepage takes place through the body of an earthen dam, it leads to 

Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 2

The most preferred soil for the central impervious core of a zoned embankment type of an earthen dam, is

Detailed Solution for Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 2

Zoned embankments are usually provided with a central impervious core, covered by a comparatively pervious transition zone, which is finally surrounded by a much more pervious outer zone. Clay inspite of it being highly impervious, may not make the best case, if it shrinks and swells too much. Due to this reason, clay is mixed with fine sand or fine gravel so as to use it as the most suitable material for the central impervious core.

Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 3

During the construction of an earthen dam by hydraulic fill method, development of pore pressures become important in the

Detailed Solution for Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 3

In hydraulic -fill method, the dam body is constructed by excavating and transporting soils by using water. Pipes called flumes, are laid along the outer edge of the embankment. Since the fall is saturated when placed, high pore pressure develop in the core material, and the stability of the dam must be checked.

Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 4

The base width of a rock fill dam, incomparison to that of an earthen dam is:

Detailed Solution for Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 4

Rockfill dams have characteristics lying somewhere between the characteristics of gravity dams and those of earthen dams. They are less flexible than earthen dams and more flexible, then gravity dams. Their foundation requirements are not a strict and rigid as are required for gravity dams. But the foundation requirements are more rigid than those for earthen dams which can be constructed almost on any types of foundations.

Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 5

On moderate foundations, and particularly in seismic areas, the type of dam which can preferably be considered for construction, is

Detailed Solution for Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 5

Rockfill dams are very useful in seismic regions, as they provide high resistance to seismic forces because of their flexible character

Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 6

The centre of pressure of wave pressure due to wave of height hw acting on a gravity dam will be at a. height above the maximum still water level of

Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 7

If the uplift pressure is neglected, the base width of an elementary profile of a gravity dam of height H, having relative density of the dam material = Sc, and coefficient of friction = μ is

Detailed Solution for Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 7


Hence, if B is taken equal to or greater than  no tension will be developed at the heel 
with full reservoir.
When, C = 1

If uplift is not considered,

For the dam to be safe in sliding,


If C = 0, i.e., no uplift is considered then,

Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 8

If full uplift pressure is considered, the base width of an elementary profile of a gravity dam of height H with relative density of dam material = Sc and coefficient of friction = μ is

Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 9

The limiting height of a low gravity dam of elementary profile neglecting uplift conditions

Detailed Solution for Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 9

If fc represents the allowable stress of the dam material, then the maximum height (Hmax) which can be obtained, without exceeding the allowable compressive stresses is given as: 

Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 1 - Question 10

For the upstream slope of an earth dam the most critical condition is

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