Question

In a dam, the pressure which the water exerts on its walls depends mainly upon which of the following?

1. Depth of water in the dam

2. Gravity

3. Extreme variation in temperatures

Select the correct answer using the codes given below.

1. 1 and 2 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

Answer 1

Correct Answer - Option 4 : 1, 2 and 3

The correct answer is ​1, 2 and 3.

• A dam is a structure built across a stream or river to hold water back.
  • Dams can be used to store water, control flooding, and generate electricity.
• The factors on which the pressure at a point in a liquid depends are:
  • Depth of the point below the free surface. Hence statement 1 is correct.
  • The density of the liquid.
  • Acceleration due to gravity. Hence statement 3 is correct.
• Besides, these dominant forces there are certainly other factors that have an impact on dam structures. These factors include: 
  • Variation in temperature unequally throughout the dam structure, Hence statement 2 is correct.
  • Amount of silt.
  • The concrete and nearby rock or soil surface losing sheer capacity and others.