Deck 5: Hydraulic Devices

Question 1

A rectangular, ____________________ weir is perhaps the most basic type and is used for measuring flow in a channel and also as a simple spillway structure.

Answer 1

sharp-crested

Question 2

Generally, a weir consists of a(n) ____________________ surface over which water is allowed to flow.

Answer 2

horizontal

Question 3

Which of the following type of weir is commonly employed in outlet structures for dams?

A)broad-crested weir
C)ogee weir
B)Cipoletti weir
D)sharp-crested weir

Answer 3

A

Question 4

A(n) ____________________ is sometimes referred to as a closed conduit that rises above the hydraulic grade line.

Question 5

A gate is an opening in an impoundment, usually for the purpose of allowing drawdown or emptying of the impoundment.

Question 6

____________________ is the loss of energy as water flows past vertical sides of a weir.

Question 7

A(n) ___________________ is a hole in the wall of a container through which water may flow.

Question 8

When water flows through a square-edged circular orifice, a contraction occurs, forming a jet with minimum diameter a short distance from the inside edge of the orifice.

Question 9

Which is a trapezoidal version of the sharp-crested weir?

A)V-notch weir
C)ogee weir
B)Cipoletti weir
D)rectangular weir

Question 10

If the water level on the discharge side of the orifice rises above the orifice, it is called a submerged orifice.

Question 11

What empirically determined value accounts for a number of hydraulic factors difficult to describe mathematically?

A)discharge coefficient
C)contraction
B)head
D)discharge (Q)

Question 12

Weirs are used to provide flow from one reservoir to another if an obstruction is located between them.

Question 13

A type of rectangular weir that is commonly used as the spillway for a dam is the Cipoletti weir.

Question 14

Which is a pipe used to draw down an impoundment by running up from the impounded water and then down the downstream channel?

A)a rectangular weir
C)a siphon
B)a sluice gate
D)an ogee weir

Question 15

Which of the following represents the orifice equation?

A) $Q = c L H ^ { 3 / 2 }$
B) $Q = c a \sqrt { 2 g h }$
C) $L = L ^ { \prime } - 0.1 n H$
D) $Q = c \left\{ \tan \frac { \Theta } { 2 } \right\} H ^ { 5 / 2 }$