Free Printable Reflection on Chapter 2

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Reflection on Chapter 2

Total questions: 16

Worksheet time: 9mins

Name

Class

Date

In a uniform open channel flow,

the total energy line either rises or falls along the channel depending on the state of the flow

the specific energy decreases along the channel

the line representing the total energy is parallel to the bed of the channel

the total energy remains constant along the channel

2 common resistance coefficients in an open channel

Manning's n

Reynold's Re

Chezy's C

Strikler's S

A trapezoidal channel is 10.0 m wide at the base and has a side slope of 4 horizontal to 3 vertical. The bed slope is 0.002. The channel is lined with smooth concrete (Manning’s n = 0.012). The hydraulic radius (in m) for a flow depth of 3.0 m is

2.1

3.0

2.2

1.5

In a very wide rectaular channel, the hydraulic radius R is equal to :

(a)

In a circular channel or culvert, the flow can be ...

Partly full flow

Half flow

Full flow/Pressure flow

Quarter flow

Choose the TRUE statement about "Best Hydraulic Section"

Best material selection

Also called as most efficient cross-section

Constructed to get a maximum wetted perimeter

Designed to convey max. Q with min. P

Normal depth implies that .......... remain constant within a prismatic channel

Discharge and bed slope

Velocity and roughness coefficient

Flow depth and flow area

All above

Which method is easier to use for normal depth calculation?

Trial & Error

Scientific Calculator

Chart

Graphical

A compound section is a combination of elementary sections, what are 2 methods that we used to determine partial discharge (Qp)?

(a)

10.

What is the minimum of Freeboard (FB) as required in Urban Stormwater Management Manual for Malaysia (MSMA)?

0.3 km

0.3 mm

0.3 cm

0.3 m

11.

The term bellow is called as ....

AR^{\frac{2}{3}}

Dependent Factor

Section Factor

Independent Factor

Conveyance Factor

12.

There are 3 types of constructed open channels, EXCEPT

Lined Channels

Erodible Channels

Pavement Channels

Grass-lined Channels

13.

Which of the following is FALSE for BHS (Rectangular Channel)?

$A\ =\ 2y^2$

$B\ =\ 2y$

$P=3.5y$

$R\ =\ 0.5y$

14.

Choose the TRUE equations used for BHS (trapezoidal channel)

$z\ =\ \frac{1}{\sqrt{3}}$

$A\ =\ By\ +\ zy^2$

$R\ =\ \frac{y}{2}$

$T\ =\ 2l$

15.

Minimum permissible velocity used to prevent sedimentation and vegetation growth, while max. permissible velocity used to prevent

(a)

16.

The main purpose of culvert design is to determine the most economic size of the culvert cross-section. Is it TRUE or FALSE?

TRUE

FALSE

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Reflection on Chapter 2

Total questions: 16

Worksheet time: 9mins

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