Lesson 3: Total Hydrostatic forces on Surfaces

Question 1

Case 1: Liquid is __________ the curved surface

Answer 1

above

Question 2

Case 2: Liquid is __________ the curved surface

Answer 2

below

Question 3

The _________________ component of the total hydrostatic force on any surface is equal to the pressure on the vertical projection of that surface.

Answer 3

horizontal

Question 4

The ___________ component of the total hydrostatic force on any surface is equal to the weight of either real or imaginary liquid above it.

Answer 4

vertical

Question 5

These are structures that block the flow of a river, stream or other waterway.

Answer 5

Dams

Question 6

Types of Dams

formed out of loose rock, earth or a combination of these materials

Answer 6

Embankment Dam

Question 7

Types of Dams

use only the force of gravity to resist water pressure

made of concrete or stone masonry

Answer 7

Gravity Dam

Question 8

Types of Dams

concrete or masonry structures that curve upstream into a reservoir, stretching from one wall of a river canyon to the other.

Answer 8

Arch Dam

Question 9

Types of Dams

consists of a wall, or face, supported by several buttresses on the downstream side

Answer 9

Buttress Dam

Question 10

any upward pressure applied to a structure that has the potential to raise it relative to its surroundings

Answer 10

uplift force (U)

Question 11

resultant moment that may cause the rotation or overturning of the dam, in the toe.

Answer 11

Overturning moment

Question 12

moment about the toe that counteracts the overturning moment

Answer 12

Righting moment

Question 13

the distance of Ry from the centerline of the base

Answer 13

eccentricity