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# Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 2

## 8 Questions MCQ Test Irrigation Engineering | Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 2

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This mock test of Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 2 for Civil Engineering (CE) helps you for every Civil Engineering (CE) entrance exam. This contains 8 Multiple Choice Questions for Civil Engineering (CE) Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 2 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 2 quiz give you a good mix of easy questions and tough questions. Civil Engineering (CE) students definitely take this Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 2 exercise for a better result in the exam. You can find other Test: Gravity Dams, Earthen Dams & Rock Fill Dams - 2 extra questions, long questions & short questions for Civil Engineering (CE) on EduRev as well by searching above.
QUESTION: 1

Solution:

QUESTION: 2

### In modern practice the free board normally provided for gravity dam is

Solution:

Fine board is provided in gravity dam is normally 3/2 hw or 4-5% of the dam material.

QUESTION: 3

### Consider the following statements : Phreatic line in an earth dam is 1. elliptical in shape 2. an equipotential line 3. the top-most flow line with zero water pressure 4. approximately a parabola Which of these Statements are correct?

Solution:
QUESTION: 4

The down stream slope of an earthen dam is critical when

Solution:
QUESTION: 5

The safe base width B of an elementary gravity dam profile using stability or sliding criteria is given by
where:
h = height of dam;
C = uplift pressure coefficient.
Others have usual meaning

Solution:
QUESTION: 6

When a reservoir is full, the maximum compressive stress in gravity-dam occurs

Solution:
QUESTION: 7

An earthquake acceleration of 0.1 g acting vertically downward causes in a gravity dam

Solution:

Effective unit weight is given by,

so when αv = 0.1 g (downward)
effective unit weight

Net effective weight of Dam

QUESTION: 8

What is the height of wave which is likely to be generated by a wind of 80 km/hr in a reservoir having a fetch of 50 km?

Solution:

Waves are generated on the surface of reservoir by the blowing winds, which causes a pressure towards the downstream side. Wave pressure depends upon the wave, height. Wave height in metres may be given by the equation.

where V is wind velocity in km/hr and F is fetch in km.
∴