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Area 2 > B. Soil and Water Conservation Engineering > Flashcards

B. Soil and Water Conservation Engineering Flashcards

1
Q

Portion of the precipitation that makes its way toward streams, channels, lakes or oceans as surface or subsurface flow.

a. Drainage
b. Runoff
c. Flow
d. None of the above

A

b. Runoff

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2
Q

The time required for water to flow from the most remote (in time of flow) point of the area to the outlet once the soil has become saturated and minor depressions filled.

a. Time of concentration
b. Lag time
c. Time to peak
d. None of the above

A

a. Time of concentration

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3
Q

The only design of small farm reservoir that is suited to flat areas, where water is stored below the ground level and pumping is required to draw out water.

a. Dugout pond
b. Straight embankment
c. Shallow well
d. Reservoir

A

a. Dugout pond

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4
Q

In constructing SFR, the soil profile in the reservoir site must be analyzed at what depth?

a. 1.5 m
b. 2.0 m
c. 3.0 m
d. 1.0 m

A

a. 1.5 m

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5
Q

Small scale earth dam structure constructed across a narrow depression or valley to collect and store rainfall and runoff during rainy season for immediate and future use?

a. Small farm reservoir
b. Small water impounding project
c. Diversion dam
d. All of the above

A

b. Small water impounding project

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6
Q

The maximum dam height for a small farm reservoir (SFR)?

a. 3.0 m
b. 4.0 m
c. 5.0 m
d. 6.0 m

A

b. 4.0 m

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7
Q

The maximum dam height for a small water impounding project

a. 5.0 m
b. 10.0 m
c. 15.0 m
d. 20.0 m

A

c. 15.0 m

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8
Q

What is the maximum depth to be classified as shallow tube well?

a. 5.0 m
b. 10.0 m
c. 15.0 m
d. 20.0 m

A

c. 15.0 m

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9
Q

The volume of water stored in reservoir between the minimum water level and normal water level.

a. Active storage
b. Dead storage
c. Normal storage
d. Storage capacity

A

a. Active storage

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10
Q

The maximum elevation the water surface which can be attained by the dam or reservoir without flow in the spillway.

a. Normal storage elevation
b. Seepage line
c. Spillway
d. Storage capacity

A

a. Normal storage elevation

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11
Q

Graphical representation of the instantaneous runoff rate against time.

A. Hydrograph
C. Pearson hydrograph
B. Log-Normal Distribution hydrograph
D. Normal hydrograph

A

A. Hydrograph

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12
Q

It is the natural or synthetic hydrograph for one unit of direct runoff from the catchments in a specific unit of time:

A. Basic hydrograph
C. Design hydrograph
B. Unit hydrograph
D. Runoff hydrograph

A

B. Unit hydrograph

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13
Q

Run-off is produced when this property of the soil surface is exceeded:

A. Percolation rate
C. Infiltration capacity
B. Erodibility
D. Permeability

A

C. Infiltration capacity

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14
Q

In discharged measurement, the readings in the staff gage are useless without this:

A. Synthetic hydrograph
C. Unit hydrograph
B. Rating curve
D. Matching curve

A

B. Rating curve

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15
Q

On the weather map, lines representing points of equal pressure is called.

A. Isohyets
C. Contour lines
B. Isobars
D. None of these

A

B. Isobars

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16
Q

Which is not an advantage in using isohyetal method in determining average rainfall over an area?

A. It is subject to only slight errors in computation
C. It utilizes stations outside the basin
B. It is easy at a glance to see rainfall pattern
D. It is possible to account for topography

A

A. It is subject to only slight errors in computation

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17
Q

A plot of line of equal potential and paths of flow conveniently drawn so that the flow between any two adjacent streamlines is equal to the flow between any other two adjacent streamlines;

A. Contour lines
C. Isohyets
B. Flow net
D. Isobars

A

B. Flow net

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18
Q

A plot of line of equal elevation is;

A. Contour lines
C. Isohyets
B. Flow net
D. Isobars

A

A. Contour lines

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19
Q

A plot of line of equal rainfall is;

A. Contour lines
C. Isohyets
B. Flow net
D. Isobars

A

C. Isohyets

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20
Q

Term for solar radiation received at the earth’s surface.

A. Insolation
C. Radiation
B. Illuminance
D. Reflection

A

A. Insolation

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21
Q

Computer aided method wherein it averages estimated precipitation at all points of a superimposed grid.

A. Inverse Distance Ratio Method
C. Grid-Point Method
B. Isohyetal Method
D. Thiessen polygon Method

A

C. Grid-Point Method

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22
Q

Station locations and amounts of rainfall are plotted on a suitable map, and contours of equal precipitation (isohyets) are then drawn.

A. Inverse Distance Ratio Method
C. Grid-Point Method
B. Isohyetal Method
D. Thiessen polygon Method

A

B. Isohyetal Method

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23
Q

Location of the rain gauges are plotted on the map of the area and stations are connected by straight lines.

A. Inverse Distance Ratio Method
C. Grid-Point Method
B. Isohyetal Method
D. Thiessen polygon Method

A

D. Thiessen polygon Method

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24
Q

Time for surface and interflow to recede; duration of flooding.

A. Recession time
C. Base time
B. Surface time
D. Surface interflow time

A

A. Recession time

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25
Q

This property of run-off is used for flood forecasting and water quality analysis. It is the time where the flood flow is highest.

A. Recession time
C. Run-off time
B. Time to lag
D. Time to peak

A

D. Time to peak

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26
Q

Used for flood forecasting and water quality studies; watershed response time.

A. Surface time
C. Recession time
B. Time to peak
D. Peak recession time

A

B. Time to peak

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27
Q

It is the time required for water to flow from the most remote point of the water shed to the outlet.

A. Time of concentration
C. Runoff coefficient
B. Rainfall coefficient
D. Rational method

A

A. Time of concentration

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28
Q

In the Soil Conservation Service method (curve number method), if the curve number is 100, this indicates that:

A. Rainfall is equal to runoff
C. Rainfall is less than runoff
B. Runoff is zero
D. Rainfall is highly erosive

A

A. Rainfall is equal to runoff

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29
Q

The ratio of peak rate of runoff to the rainfall intensity is:

A. Time of concentration
C. Runoff coefficient
B. Rainfall coefficient
D. Rational method

A

C. Runoff coefficient

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30
Q

Same as interflow:

A. Surface runoff
C. Groundwater runoff
B. Subsurface runoff
D. Runoff volume

A

B. Subsurface runoff

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31
Q

Total water yield from a storm for a given watershed.

A. Surface runoff
C. Groundwater runoff
B. Subsurface runoff
D. Runoff volume

A

A. Surface runoff

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32
Q

That which travels over the ground surface and through the channels to reach the basin outlet.

A. Surface runoff
C. Groundwater runoff
B. Subsurface runoff
D. Runoff volume

A

A. Surface runoff

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33
Q

Surface runoff plus interflow.

A. Base flow
C. Groundwater runoff
B. Direct runoff
D. Peak flow

A

B. Direct runoff

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34
Q

Groundwater discharge into a stream due to deep percolation of the infiltrated water into groundwater aquifers.

A. Groundwater surface runoff
C. Groundwater runoff
B. Groundwater subsurface runoff
D. Groundwater runoff volume

A

C. Groundwater runoff

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35
Q

Advanced stage of rill erosion. Rills when neglected develop in size and become gullies.

A. Slip erosions
C. Stream bank erosion
B. Wind erosions
D. Gully erosion

A

D. Gully erosion

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36
Q

Detachment and transport of soil particles by concentrated flow of water creating channels larger and deeper than rills.

A. Interrill erosion
C. Stream channel erosion
B. Rill erosion
D. Gully erosion

A

D. Gully erosion

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37
Q

Combination of sheet and splash erosion.

A. Interrill erosion
C. Gully erosion
B. Rill erosion
D. Stream channel erosion

A

A. Interrill erosion

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38
Q

Removal of soil by water from small but well-defined channels when there is concentration of overland flow.

A. Interrill erosion
C. Gully erosion
B. Rill erosion
D. Stream channel erosion

A

D. Stream channel erosion

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39
Q

Consists of soil removal from stream banks or soil movement in the channel.

A. Interrill erosion
C. Gully erosion
B. Rill erosion
D. Stream channel erosion

A

D. Stream channel erosion

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40
Q

The type of erosion that takes place in small channels which cannot be obliterated by tillage operations is called:

A. Sheet erosion
C. Interrill erosion
B. Rill erosion
D. Gully erosion

A

D. Gully erosion

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41
Q

Soil detachment and transport resulting from the impact of water drops directly on soil particles or on thin water surfaces.

A. Interrill erosion
C. Splash / raindrop erosion
B. Rill erosion
D. Stream channel erosion

A

C. Splash / raindrop erosion

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42
Q

Landslides and slips due to saturation of steep hills and slopes.

A. Slip erosions
C. Coastal erosions
B. Wind erosions
D. Stream bank erosion

A

A. Slip erosions

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43
Q

Erosion caused by wave action on the seashore.

A. Slip erosions
C. Coastal erosions
B. Wind erosions
D. Stream bank erosion

A

C. Coastal erosions

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44
Q

Caused by high velocity winds moving over barren land surfaces.

A. Slip erosions
C. Coastal erosions
B. Wind erosions
D. Stream bank erosion

A

B. Wind erosions

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45
Q

Primarily caused by raindrop.

A. Slip erosions
C. Coastal erosions
B. Wind erosions
D. Splash/Raindrop erosion

A

D. Splash/Raindrop erosion

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46
Q

The type of erosion that takes place in small channels which cannot be obliterated by tillage operations is called.

A. Sheet
C. Interrill
B. Rill
D. Gully

A

D. Gully

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47
Q

It is type of erosion where small channels are formed on the surface of the soil.

A. Sheet
C. Splash
B. Rill
D. Gully

A

B. Rill

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48
Q

Finger-like rills appear on the soil surface.

A. Gully erosion
C. Sheet erosions
B. Rill erosions
D. Interill erosions

A

B. Rill erosions

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49
Q

Detachment and transport of soil by concentrated flow of water creating shallow rills or furrows.

A. Gully erosion
C. Stream channel erosion
B. Rill erosions
D. Interill erosions

A

B. Rill erosions

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50
Q

The USLE is a method of computing soil erosion. What type of soil erosion does it estimate?

A. Sheet erosion only
C. Sheet, rill and gully erosion
B. Sheet and rill erosion only
D. All types of erosion

A

B. Sheet and rill erosion only

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51
Q

Uniform removal of soil in thin layers from sloping land resulting from over land flow:

A. Stream channel erosion
C. Gully erosion
B. Rill erosion
D. Sheet erosion

A

D. Sheet erosion

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52
Q

A thin film of soil layer detached and transported by water flowing on the land surface:

A. Slip erosions
C. Splash/Raindrop erosion
B. Wind erosions
D. Sheet erosions

A

D. Sheet erosions

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53
Q

How does a gully develop?
i. Stabilization stage
ii. Channel erosion by downward scour of the topsoil
iii. Healing stage
iv. Upward movement of gully head and enlargement of the gully width

A. ii, iv, i, iii
C. ii, iii, iv, i
B. iv, ii, iii, i
D. ii, iv, iii, i

A

D. ii, iv, iii, i

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54
Q

Type of flow wherein the depth of flow in a prismatic channel is constant at any point in the channel.

A. Laminar flow
C. Steady flow
B. Uniform flow
D. Critical flow

A

C. Steady flow

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55
Q

Type of flow wherein the discharge or flow in a prismatic channel is constant with respect to time.

A. Laminar flow
C. Steady flow
B. Uniform flow
D. Critical flow

A

C. Steady flow

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56
Q

Type of open channel flow in which the flow depth does not change with time is:

A. Uniform flow
C. Steady flow
B. Critical flow
D. Unsteady flow

A

C. Steady flow

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57
Q

Discharge is constant with respect to time.

A. Spatially variable flow
C. Steady flow
B. Turbulent flow
D. Laminar flow

A

C. Steady flow

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58
Q

Same as groundwater runoff.

A. Base flow
C. Groundwater runoff
B. Subsurface runoff
D. Runoff volume

A

A. Base flow

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59
Q

When is the best/recommended time to sample sediment load in the stream?

A. Base flow
C. Peak flow
B. Intermittent flow
D. Perennial flow

A

C. Peak flow

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60
Q

Used to determine the magnitude of floods and a valuable consideration in the design of structures.

A. Peak flow
C. Base flow
B. Subsurface runoff
D. Groundwater runoff

A

A. Peak flow

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61
Q

If the depth changes abruptly over a comparatively short distance such as in a hydraulic jump.

A. Turbulent flow
C. Rapidly varied flow
B. Gradually varied flow
D. Unsteady flow

A

C. Rapidly varied flow

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62
Q

A hydraulic jump is a classic example of this type of flow:

A. Unsteady flow
C. Rapidly Varied flow
B. Gradually varied flow
D. Critical flow

A

C. Rapidly Varied flow

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63
Q

If the depth changes smoothly over a distance.

A. Spatially variable flow
C. Laminar flow
B. Turbulent flow
D. Gradually varied flow

A

D. Gradually varied flow

64
Q

Depth changes along the length of channel.

A. Laminar flow
C. Gradually varied flow
B. Rapidly varied flow
D. Varied flow

A

D. Varied flow

65
Q

Fluid moves in parallel layers with no cross-currents; Re ≤ 2000.

A. Turbulent flow
C. Laminar flow
B. Gradually varied flow
D. Spatially variable flow

A

C. Laminar flow

66
Q

Special case of flow in which the discharge varies with distance along the channel.

A. Turbulent flow
C. Laminar flow
B. Gradually varied flow
D. Spatially variable flow

A

D. Spatially variable flow

67
Q

Type of flow wherein the depth of flow at every section of a prismatic channel is constant.

A. Uniform flow
C. Laminar flow
B. Steady flow
D. Critical flow

A

A. Uniform flow

68
Q

Depth of flow is the same at every section of the prismatic channel.

A. Uniform flow
C. Turbulent flow
B. Laminar flow
D. Steady flow

A

A. Uniform flow

69
Q

A type of flow where the discharge passing a given cross section of a stream is constant with time.

A. Uniform flow
C. Varied flow
B. Spatially variable flow
D. Unsteady flow

A

A. Uniform flow

70
Q

Discharge is not constant with respect to time.

A. Spatially variable flow
C. Laminar flow
B. Turbulent flow
D. Unsteady flow

A

D. Unsteady flow

71
Q

The simplest form of open channel flow computation is:

A. Unsteady uniform flow
C. Steady uniform flow
B. Steady non-uniform flow
D. Unsteady non-uniform flow

A

C. Steady uniform flow

72
Q

What is the term for water that penetrates into the soil and flows laterally in the surface soil to a stream channel?

A. Runoff
C. Percolation
B. Interflow
D. All of these

A

B. Interflow

73
Q

That which infiltrates into the soil surface and moves laterally through the upper soil horizons towards streams as perched groundwater above major groundwater level.

A. Base flow
C. Overland flow
B. Interflow
D. Peak flow

A

B. Interflow

74
Q

The lateral movement of percolating water when it encounters impervious layer is called:

A. Seepage
C. Baseflow
B. Interflow
D. Surface runoff

A

B. Interflow

75
Q

Characterize by irregular path of particle movements which keep of crossing and re-crossing.

A. Turbulent flow
C. Steady flow
B. Laminar flow
D. Uniform flow

A

A. Turbulent flow

76
Q

Characterized by pulsatory cross-current velocities; re ≥ 4000.

A. Turbulent flow
C. Laminar flow
B. Spatially variable flow
D. Gradually varied flow

A

A. Turbulent flow

77
Q

When the water level in the pipe drops below the upper edge of the pipe or culvert and its conduit controls, the flow becomes:

A. Weir flow
C. Open channel flow
B. Orifice flow
D. Pipe flow

A

C. Open channel flow

78
Q

That part of surface runoff that flows over the surface towards the stream channel.

A. Base flow
C. Overland flow
B. Direct runoff
D. Peak flow

A

C. Overland flow

79
Q

The two depths of flow that give the same specific energy are called:

A. Critical depths
C. Conjugate depths
B. Sequent depths
D. Alternate depths

A

D. Alternate depths

80
Q

The speed at which water flows in channel is:

A. Velocity
C. Discharge
B. Runoff
D. Volumetric flow

A

A. Velocity

81
Q

It is equal to the cross-sectional area times the velocity of flow:

A. Velocity
C. Discharge
B. Runoff
D. Volumetric flow

A

C. Discharge

82
Q

The velocity of water passed in a cross-sectional area.

A. Discharge
C. Stream size
B. Velocity
D. Unit stream

A

A. Discharge

83
Q

The volume of water flowing each second, measured in m3/sec.

A. Discharge
C. Stream flow
B. Velocity
D. Cross-sectional area

A

A. Discharge

84
Q

The volume of water flowing each second.

A. Velocity
C. Cross-sectional area
B. Stream flow
D. None of these

A

D. None of these

85
Q

The capacity of water bodies to cleanse themselves of pollutants over a period of time and/or stretch.

A. Stress capacity
C. Driving capacity
B. Assimilative capacity
D. Water holding capacity

A

B. Assimilative capacity

86
Q

It is the measure of the difference in ground level between two places in a field is referred to as percentage. It is the number of meter difference in elevation for each 100 m of horizontal distance.

A. Velocity
C. Discharge
B. Land slope
D. Side slope

A

B. Land slope

87
Q

Construction of earth embankment or ridge and channel across the slope at an acceptable grade to control the flow of runoff as well as soil particles.

A. Riprap
C. Diversion canal
B. Gabions
D. Terracing

A

D. Terracing

88
Q

Banae rice terraces is a.

A. Broad base terrace
C. Bench terrace
B. Conservation terrace
D. All of these

A

C. Bench terrace

89
Q

A type of terrace usually used for 9-24% slope characterized by breaking the slope at certain intervals by a ridge and a flat portion to trap runoff.

A. Bench terrace
C. Broad-based terrace
B. Zingg terrace
D. Manning’s terrace

A

B. Zingg terrace

90
Q

A type of terrace usually used for 25-30% slope characterized by construction of series of platforms along the contours cut into the hill slope in a step like formation.:

A. Bench terrace
C. Zingg terrace
B. Broad based terrace
D. Manning’s terrace

A

A. Bench terrace

91
Q

Interval between corresponding points on successive terraces.

A. Horizontal interval
C. Contour map
B. Vertical Interval
D. Contour line

A

A. Horizontal interval

92
Q

. Interval between corresponding points on successive terraces or from top of slope to the bottom of first terrace.

A. Horizontal interval
C. Contour map
B. Vertical Interval
D. Contour line

A

B. Vertical Interval

93
Q

An imaginary line of constant elevation on the surface of the ground.

A. Horizontal interval C. Contour map
B. Vertical Interval
D. Contour line

A

D. Contour line

94
Q

The locus of the elevation to which water will rise in a piezometric tube.

A. Hydraulic gradient
C. Friction gradient
B. Energy gradient
D. velocity gradient

A

A. Hydraulic gradient

95
Q

Provide record of the highest stage observed at a stream.

A. Float type water stage recorder
C. Bubbler gage
B. Float method
D. Crest stage gage

A

D. Crest stage gage

96
Q

Measures the velocity of a floating object preferably in a straight section of a stream.

A. Float type water stage recorder
C. Bubbler gage
B. Float method
D. Crest stage gage

A

B. Float method

97
Q

Record the pressure required to maintain a small flow of gas from an orifice submerged in the stream.

A. Float type water stage recorder
C. Bubbler gage
B. Float method
D. Crest stage gage

A

C. Bubbler gage

98
Q

Motion of a float is recorded on a graph.

A. Float type water stage recorder
C. Bubbler gage
B. Float method
D. Crest stage gage

A

A. Float type water stage recorder

99
Q

It is the instrument used in measuring stream velocity.

A. Anemometer
C. Current meter
B. Hydrograph
D. None of these

A

C. Current meter

100
Q

Can stabilize the slopes of the gully and hence reduce runoff velocities.

A. Riprap
C. Check dams or weirs
B. Grassed waterways
D. Vegetation

A

B. Grassed waterways

101
Q

Establishment of natural waterways or construction of canals and planting it with grasses to make it stable and arrest soil erosion.

A. Check dams or weirs
C. Grassed waterways
B. Farm Ponds / Water Impounding Dams
D. Riprap

A

C. Grassed waterways

102
Q

A structure which conveys water from a higher to a lower level, maybe inclined or vertical.

A. Water way structure
C. Drop structure
B. Spillway
D. Watershed structure

A

c. drop structure

103
Q

Constructed along the channel or waterway to control the velocity of flowing water and encourage deposition of sediments carried by water.

A. Check dams or weirs
C. Gabions
B. Farm Ponds / Water Impounding Dams
D. Riprap

A

A. Check dams or weirs

104
Q

Temporary detainment of water in farm pond and dams to mitigate the erosive capacity of water.

A. Check dams or weirs
C. Gabions
B. Farm Ponds / Water Impounding Dams
D. Riprap

A

B. Farm Ponds / Water Impounding Dams

105
Q

Similar to stone check dams however the stones in this case are placed on rectangular wire mesh, piled up as blocks and tied together to form a reinforced wall or dam structure.

A. Check dams or weirs
C. Gabions
B. Farm Ponds / Water Impounding Dams
D. Riprap

A

C. Gabions

106
Q

Landslides and slips due to saturation of steep hills and slopes
.
A. Slip erosions
C. Coastal erosions
B. Wind erosions
D. Stream bank erosion

A

A. Slip erosions

107
Q

The volume of water that can be stored in or released from an aquifer per unit horizontal area per unit change in hydraulic head is.

A. Specific storage
C. Storage coefficient
B. Specific yield
D. Transmissivity

A

C. Storage coefficient

108
Q

Erosion of stream banks by flowing water.

A. Slip erosions
C. Coastal erosions
B. Wind erosions
D. Stream bank erosion

A

D. Stream bank erosion

109
Q

The rational method of determining runoff is applicable to.

A. Watershed with good vegetation
C. Small watershed
B. Large watershed
D. All watershed

A

A. Watershed with good vegetation

110
Q

A topographically delineated area which drains into a reference point in the stream.

A. Soil conservation
C. Percolation
B. Seepage
D. Watershed

A

D. Watershed

111
Q

The rational equation is applicable for a:

A. Flat and small watershed
C. Sloping and small watersheds
B. Flat and large watersheds
D. Sloping and large watersheds

A

C. Sloping and small watersheds

112
Q

A watershed management strategy which makes used of reforestation and infrastructures for the conservation.

A. Rehabilitation
C. Manipulation
B. Vegetation
D. Protection

A

A. Rehabilitation

113
Q

Total of time to peak and recession time.

A. Base flow time
C. Overland flow time
B. Base time
D. Peak flow time

A

B. Base time

114
Q

. Which is not directly related to the small water impounding project.

A. To control flood and erosion
C. For supplementary irrigation
B. For power generation and fish culture
D. None of these

A

D. None of these

115
Q

A watershed management strategy where the area is left alone in each natural state and there is minimum or no interference from man is:

A. Rehabilitation
C. Manipulation
B. Vegetation
D. Protection

A

D. Protection

116
Q

Which is not true about pipe flow?

A. Flow is subjected to atmospheric pressure
C. It exerts no direct pressure
B. Flow is confined in a closed conduit
D. It exerts hydraulic pressure

A

A. Flow is subjected to atmospheric pressure

117
Q

A super critical flow is a flow condition where:

A. Fr =1
C. Fr<1
B. Fr >1
D. Fr >4000

A

B. Fr >1

118
Q

Type of sediment load along the stream characterized as sediments that are sometimes stationary or
sometimes carried by the water along the stream.

A. Saltating load
C. Temporary load
B. Bed load
D. Suspended load

A

A. Saltating load

119
Q

The physical characteristics of water which greatly affect the survival of flora and fauna in the body of water, and its increase will also cause increase in the biological activity and higher demand for dissolved oxygen.

A. Sediment
C. Turbidity
B. Temperature
D. pH

A

B. Temperature

120
Q

Which is not a correct description of a soil erosion plot which is used to experimentally measure soil
erosion?

A. Bare follow
C. 22 meters long
B. 9% slope
D. 7.26 feet high

A

D. 7.26 feet high

121
Q

The capacity of rainfall to affect the detachment and transport of soil particles:

A. Erodability
C. Erosivity
B. Effectivity
D. Conductivity

A

C. Erosivity

122
Q

The rate of evapotranspiration of vigorously growing crop that completely shades the ground and is adequately supplied with soil moisture is:

A. Actual crop evapotranspiration
C. Potential evapotranspiration
B. Reference crop evapotranspiration
D. Crop water requirement

A

C. Potential evapotranspiration

123
Q

Using the float method in determining the velocity of water in a channel, the float velocity in relation the average water velocity is:

A. Equal to the average water velocity
C. Greater than the average water velocity
B. Less than the average water velocity
D. No relation at all

A

C. Greater than the average water velocity

124
Q

Which of the following statements is true?

A. The average velocity in an open channel is located at 0.6 of the depth measure from the bottom
B. The average velocity is greater than the surface velocity
C. The maximum velocity occurs at the surface
D. The average velocity in an open channel is located at 0.4 of the depth measured from the bottom

A

D. The average velocity in an open channel is located at 0.4 of the depth measured from the bottom

125
Q

The following are the main functions of terracing, except:

A. For farmability and tillability of slopeland
C. For increased soil fertility
B. For flood control
D. For water conservation

A

A. For farmability and tillability of slopeland

126
Q

When contour line from a closed figure with the highest elevation in the center, the topographic map
indicates:

A. Mound
C. River
B. Valley
D. Depression

A

A. Mound

127
Q

When contour line from a closed figure with the lowest elevation in the center, the topographic map indicates:

A. Mound
C. River
B. Valley
D. Depression

A

D. Depression

128
Q

The features of topographic map which shows the low area between two adjacent hills:

A. Mound
C. River
B. Valley
D. Depression

A

B. Valley

129
Q

The features of topographic map which is the line connecting the lowest elevations between two adjacent ridges.

A. Mound
C. River
B. Valley
D. Depression

A

C. River

130
Q

The features of topographic map which the line connecting the highest elevation between two adjacent valleys.

A. Ridge
C. River
B. Valley
D. Saddle

A

D. Saddle

131
Q

A uniform distribution of water is obtained in border irrigation by stopping the flow at the right time and using a:

A. Large stream size
C. Variable stream size
B. Small stream size
D. Rapid stream size

A

B. Small stream size

132
Q

Conservation of energy is often applied in practice as:

A. Pascal Law
C. Darcy Equation
B. Torrecelli Theorem
D. Bernoullis Equation

A

D. Bernoullis Equation

133
Q

It is the right of each land owner along the stream which entitles him/her to have the water flow in its natural channel undermined in quantity and unpolluted in quality:

A. Appropriation right
C. Water right
B. Riparian right
D. Irrigation right

A

B. Riparian right

134
Q

What is the effect of the presence of extensive vegetation in a watershed:

A. Reduce peak runoff rates
C. Both A and B
B. Increases infiltration capacity
D. None of these

A

C. Both A and B

135
Q

The shear stress of the fluid times the slope of the velocity vectors is a constant called:

A. Dynamic viscosity
C. Relative density
B. Unit weight
D. Compressive stress

A

A. Dynamic viscosity

136
Q

Replanting of forest trees species in the watershed area:

A. Cropping systems
C. Agroforestry
B. Strip cropping
D. Reforestation

A

D. Reforestation

137
Q

Planting different crops simultaneously in the same field at the same cropping season:

A. Multi cropping or mixed cropping
C. Relay cropping
B. Graded terrace
D. Strip cropping

A

A. Multi cropping or mixed cropping

138
Q

It is defined as the spatial and temporal combination of crops in a given area and the management used to produce them.

A. Cropping system
C. Multiple cropping
B. Cropping pattern
D. Strip cropping

A

B. Cropping pattern

139
Q

It is the growing of two crops in rapid sequence of succession planting one after the harvest of the former.

A. Relay cropping
C. Intercropping
B. Ratoon cropping
D. Sequential cropping

A

D. Sequential cropping

140
Q

(Crop rotation) planting different crops, one after the other each season:

A. Multi cropping or mixed cropping
C. Relay cropping
B. Graded terrace
D. Strip cropping

A

C. Relay cropping

141
Q

The herbaceous plants grown in cultivated fields with a more or less extensive system of culture.

A. Horticultural crops
C. High value crops
B. Field crops
D. Tuber crops

A

B. Field crops

142
Q

The garden crops, grown under systems of intensive culture in relatively small areas.

A. Horticultural crops
C. High value crops
B. Field crops
D. Tuber crops

A

A. Horticultural crops

143
Q

It is an orderly sequence of planting crop in an area for a 365-day period.

A. Cropping pattern
C. Crop sequence
B. Crop combination
D. Cropping schedule

A

A. Cropping pattern

144
Q

Is the practice of growing different crops in alternate strips across the slope to serve as barriers for soil erosion.

A. Cropping systems
C. Mulching
B. Contour cultivation
D. Strip cropping

A

D. Strip cropping

145
Q

A crop produced for direct sale for cash, as contracted with crops produced as livestock feed:

A. Cover crop
C. Cash crop
B. Inter-tilled crop
D. Companion crop

A

C. Cash crop

146
Q

The number of crops grown per annum on a given area of land.

A. Cropping index
C. Yield index
B. Planting density
D. Relative yield

A

A. Cropping index

147
Q

Consists of carrying out agricultural operations very nearly on the contour. It reduces the velocity of overland flow and retards soil erosion:

A. Cropping systems
C. Mulching
B. Contour cultivation
D. Strip cropping

A

B. Contour cultivation

148
Q

Modification of cropping system such as crop rotation and mixed cropping:

A. Cropping systems
C. Mulching
B. Contour cultivation
D. Strip cropping

A

A. Cropping systems

149
Q

A crop which is planted in shortly before the first crop is to be harvested:

A. Relay crop
C. Cash crop
B. Inter-tilled crop
D. Companion crop

A

A. Relay crop

150
Q

A crop grown between orchard trees or on field between cropping season to protect the land from leaching and erosion:

A. Cover crop
C. Cash crop
B. Inter-tilled crop
D. Companion crop

A

A. Cover crop

151
Q

It is defined as the spatial and temporal combination of crops in a given area and the management used to produce them.

A. Cropping system
C. Multiple cropping
B. Cropping pattern
D. Strip cropping

A

B. Cropping pattern

152
Q

It is the growing of two crops in rapid sequence of succession planting one after the harvest of the former.

A. Relay cropping
C. Intercropping
B. Ratoon cropping
D. Sequential cropping

A

D. Sequential cropping

153
Q

A planting process that uses a slurry of seed and mulch. It is often used as an erosion control technique, and as an alternative to the traditional process of broadcasting or sowing dry seeds.

A. Hydroseeding
C. Hydrosowing
B. Hydroplanting
D.Hydrotransplanting

A

A. Hydroseeding

154
Q

A storm occurred in two similar watersheds, Gladz and Karl, both 700 has. in area. Gladz watershed is long and slender while Karl watershed is short but wide. Which watershed will experience the earliest and highest peak flow assuming that the rainfall over the watershed is evenly distributed?

A. Karl
C. The same
B. Gladz
D. Neither Karl nor Gladz

A

A. Karl

155
Q

In the identification of potential dam sites, which one is not part of the guidelines?

A. High density population to supply the needed labor

B. Availability of potential service area for irrigation, power, domestic water supply, and flood control

C. Availability of a narrow gorge for minimum earthwork for dam embankment

D. Topographic condition providing a wide and deep reservoir upstream of the dam sites

A

A. High density population to supply the needed labor

Area 2 (12 decks)

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