Deck 7: Uniform Flow in Channels

Question 1

Maximum flow in a given circular pipe occurs at a depth of ____ percent of full depth.

A)12
C)72
B)45
D)94

Answer 1

D

Question 2

___________________ distribution in a pipe is influenced by the cross-section shape.

Answer 2

Velocity

Question 3

Which equation may be used to compute normal depth in a stream considered uniform?

A)Bernoulli's equation
C)Froude number
B)Manning's equation
D)discharge equation

Answer 3

B

Question 4

Manning's equation is used to find ___________________ if normal depth is known.

Question 5

Obstructions in a stream cause a variation in the water surface profile called a(n) ____________________ curve.

Question 6

Manning's equation is used to compute ____.

A)normal depth in a uniform channel
B)critical depth in a uniform channel
C)critical velocity
D)normal velocity

Question 7

There is no difference between pipe flow and rectangular channel flow.

Question 8

Roughness factor is an empirical number that describes the roughness of the channel lining.

Question 9

Wetted perimeter in a pipe can be computed by ____.

A) $\frac { \Theta } { 360 } ( 2 \pi r )$
B) $\frac { r ^ { 2 } } { 2 } \left( \frac { \Theta \pi } { 180 } - \sin \Theta \right)$
C) $\frac { Q } { a }$
D) $\frac { a } { p }$

Question 10

When water flows by gravity in a pipe partially full (not under pressure), it conforms to the laws of ___________________ channel flow.

Question 11

Storm sewers, sanitary sewers, and culverts are the principal applications of ____.

A)stream flow
C)pipe flow
B)open channel flow
D)hydraulic design

Question 12

Values determined by using design charts are more precise than those obtained by using Manning's equation directly.

Question 13

In a pipe, velocity is the same for both half and full flow.

Question 14

Streams are naturally occurring open channels with varying uniformity of cross section and ___________________.

Question 15

Computing discharge when normal depth is known is a typical engineering problem involving uniform flow in channels.