Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Wala lang trip lang > Irrigation and Drainage Engineering > Flashcards

Irrigation and Drainage Engineering Flashcards

1
Q

The maximum permissible water velocity for clay loam canal surface based on PAES 603:2016 (AMTEC, 2016).
A. 1.2 m/s
B. 1 m/s
C. 0.9 m/s
D. 0.8 m/s

A

D. 0.8 m/s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The minimum permissible velocity for water with sediments in lined canals based on PAES 603:2016.
A. 1.2 m/s
B. 1 m/s
C. 0.9 m/s
D. 0.80 m/s

A

C. 0.9 m/s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Application of water in the soil to supply moisture needed for plant growth.
A. Flooding
B. Sprinkling
C. Irrigation
D. Diverting

A

C. Irrigation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Loss of water from a channel during transport due to seepage and percolation.
A. Channel loss
B. Seepage loss
C. Percolation loss
D. Conveyance loss

A

D. Conveyance loss

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Depth of water flow where the energy content is at minimum hence, no other backwater forces are involved.
A. Minimum depth
B. Critical depth
C. Energy depth
D. Normal depth

A

B. Critical depth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Ratio of the actual crop evapotranspiration to its potential evapotranspiration.
A. Crop ratio
B. ET ratio
C. Crop coefficient
D. Evaporation ratio

A

C. Crop coefficient

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Moisture content of the soil when gravitational water has been removed.
A. Soil capacity
B. Gravitational moisture
C. Field capacity
D. Specific capacity

A

C. Field capacity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Number of days between irrigation applications.
A. Irrigation interval
B. Application interval
C. Dry interval
D. Node interval

A

A. Irrigation interval

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Removal of excess water.
A. Squeezing
B. Run off
C. Discharging
D. Drainage

A

D. Drainage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Elevated section of open channel used for crossing natural depressions.
A. Parshall flume
B. Flume
C. Siphon
D. Elevated channel

A

B. Flume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Surveying instrument used for determining land areas in a topographic maps.
A. Aerometer
B. Erometer
C. Planimeter
D. Lysimeter

A

C. Planimeter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Elevation of water surface in a stream with reference to a certain datum.
A. Stage
B. Surface elevation
C. Contour
D. Water elevation

A

A. Stage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Facility for determining water consumptive use of crops in an open field.
A. Planimeter
B. Lysimeter
C. Consumeter
D. Crop meter

A

B. Lysimeter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Time required to cover an area with one application of water.
A. Irrigation interval
B. Irrigation period
C. Supply duration
D. Application time

A

B. Irrigation period

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

At optimal emitter spacing, drip emitter spacing is ___ of the wetted diameter estimated from
field tests.
A. 100%
B. 90%
C. 80%
D. 85%

A

C. 80%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
  1. Reference crop evapotranspiration is the rate of evapotranspiration from a reference surface which is a hypothetical reference crop with an assumed crop height of 0.2 m and an albedo of _______ (AMTEC, 2020).
    A. 0.23
    B. 0.25
    C. 0.30
    D. 0.32
A

A. 0.23

17
Q

Manufacturer’s coefficient of variation is the measure of the variability of discharge of a randomsample of a given make, model and size of emitter, as provided by the manufacturer and before any field operations or aging has taken place determined through a discharge test of a sample of 50 emitters under a set pressure at ___ oC.
A. 20
B. 100
C. 50
D. 30

A

A. 20 (PAES 608:2016 )

18
Q

Which one is the flattest canal side slope?
A. 1:1
B. 1:4
C. 4:1
D. 2:1

A

C. 4:1

In specifying side slope, run is written first, ex. 4:1 means horizontal run is 4.
In computing angles whether bed slope or side slope, rise is the numerator.
Some fluid mechanics and hydraulics books use Ө symbol for side angle with the vertical plane, not with the horizontal. In this case subtract Ө from 90° to get angle with the horizontal plane.

19
Q

Determine the side slope angle Ө with the horizontal plane of an unlined canal with side
slope ratio (run: rise) z of 2:1.
A. 16.6 degrees
B. 26.6 degrees
C. 45 degrees
D. 60 degrees

A

B. 26.6 degrees

tan θ = rise/run
θ = arctan(1/2)
θ = 26.6 degrees

20
Q

If the most efficient concrete canal has its side angle Ө with the horizontal plane equal to 60 degrees, what is the z value of the canal sides or the side’s horizontal run in meters per 1 meter rise? This value is commonly used in designing most efficient concrete canals.
A. 0.775
B. 0.757
C. 0.577
D. 1/0.577

A

C. 0.577

tan θ = 1/z
tan 60 = 1/z
z = 0.577

21
Q

What is the top width at water surface level of the most efficient concrete open channel if the
design depth is 5 meters? The design discharge is 100 m3/s and velocity is 2 m/s.
A. 1.29 m
B. 9.12 m
C. 12.9 m
D. 19.2 m

A

C. 12.9 m (Check Tambong II for solution)

22
Q

What is the total top width of the most efficient concrete open channel if design depth is 5
meters? Design discharge is 100 m3/s and velocity is 2 m/s. Use 15% freeboard.
A. 12.9 m
B. 13.8 m
C. 18.3 m
D. 8.13 m

A

B. 13.8 m (Check Tambong II for solution)

23
Q

What is the base of the most efficient trapezoidal concrete open channel if discharge is 100m3/s and velocity is 2 m/s?
A. 6.14 m
B. 12.8 m
C. 7.21 m
D. 14.6 m

A

A. 6.14 m (Check Tambong II for solution)

24
Q

What is the bottom width for the best hydraulic cross-section (best proportion) of concrete
open channel if design depth is 5 meters and side slope is 45 degrees?
A. 3 m
B. 4 m
C. 5 m
D. 6 m

A

B. 4 m (Check Tambong II for solution)

25
Q

What is the bottom width for best hydraulic cross-section of unlined open channel for
minimum seepage if design depth is 5 meters and side slope is 45 degree?
A. 3.15 m
B. 4.15 m
C. 8.15 m
D. 6.15 m

A

C. 8.15 m (Check Tambong II for solution)

26
Q

What is the bottom width for best hydraulic cross-section of unlined open channel with
minimum seepage if design depth is 5 meters and side slope is 2:1?
A. 4.72 m
B. 7. 42 m
C. 2.47 m
D. 7.24 m

A

A. 4.72 m (Check Tambong II for solution)

27
Q
  1. Estimate the width and depth of concrete-lined rectangular open channel for water velocity of 2 m/s and discharge of 10 m3/s.
    A. 6.1 m, 2.3 m
    B. 3.2 m, 1.6 m
    C. 2.5m, 5.0 m
    D. 13.6 m, 3.1 m
A

B. 3.2 m, 1.6 m (Check Tambong II for solution)

28
Q

What should be the base and depth of concrete-lined rectangular open channel for a cross-sectional area of 50 m2? Design for efficiency over proportion.

A. 10 m, 5 m
B. 12 m, 6 m
C. 2.5 m, 5 m
D. 3 m, 6 m

A

A. 10 m, 5 m (Check Tambong II for solution)

29
Q

What should be the depth and side angle with the horizontal of concrete-lined triangular open
channel for a cross-sectional area of 50 m2?

A. 5 m, 16.6o
B. 6 m, 26.6o
C. 7 m, 45o
D. 8 m, 60o

A

C. 7 m, 45o (Check Tambong II for solution)

30
Q

What design depth of open channel would you recommend to carry 100 cumecs or cubic
meters/sec with a velocity of 5 mps? Use the most efficient of all trapezoidal cross-sections.
A. 1.4 m
B. 2.4 m
C. 3.4 m
D. 1.3 m

A

C. 3.4 m (Check Tambong II for solution)

31
Q

If the most efficient of all trapezoidal cross sections can be used, what actual depth of open channel would you recommend to carry 100 cumecs with a velocity of 5 mps? Use 15% freeboard.
A. 3.9 m
B. 3.5 m
C. 3.6 m
D. 1.3 m

A

A. 3.9 m (Check Tambong II for solution)

32
Q

If an unlined trapezoidal canal with best hydraulic cross-section can be used, what actual
depth of open channel would you recommend to carry 10 cumecs with a velocity of 1 mps? Use 2:1 side slope and 15% freeboard.
A. 1.12 m
B. 2.12 m
C. 21.2 m
D. 2.21 m

A

B. 2.12 m (Check Tambong II for solution)

Wala lang trip lang (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions