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MSU-GSC: Part II > Practice Test: Hydrology and Soil and Water Conservation Engineering > Flashcards

Practice Test: Hydrology and Soil and Water Conservation Engineering Flashcards

1
Q

The factor that affects adoption of soil and water conservation measures

a. land tenure
b. high initial investment cost
c. construction skills
d. both a and b
e. all of the above

A

e. all of the above

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2
Q

Which of the following irrigation projects is under the implementation and supervision of National Irrigation Administration?

a. Small Farm Reservoir (SFR)
b. Small Water Impounding Project (SWIP)
c. Communal Irrigation System (CIS)
d. None of the above
e. All of the above

A

c. Communal Irrigation System

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3
Q

The detachment and transport of soil by a concentrated flow of water

a. sheet erosion
b. interill erosion
c. rill erosion
d. streambank erosion
e. none of the above

A

c. rill erosion

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4
Q

The ratio of the circumference of a circle of the same area as the basin, to the basin perimeter

a. circulatory ratio
b. elongation ratio
c. circumferential ratio
d. relief ratio
e. none of the above

A

a. circulatory ratio

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5
Q

A stream that flows only in direct response to precipitation

a. perennial stream
b. intermittent stream
c. ephemeral stream
d. both a and b
e. both b and c

A

c. ephemeral stream

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6
Q

A hydrograph with a unit volume of direct runoff for a given storm duration

a. unit hydrograph
b. basic hydrograph
c. runoff hydrograph
d. synthetic hydrograph
e. dimensionless hydrograph

A

a. unit hydrograph

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7
Q

Which of the following is not a purpose of terracing?

a. to reduce soil erosion
b. for water conservation
c. for flood control
d. for soil fertility rejuvenation
e. none of the above

A

d. for soil fertility rejuvenation

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8
Q

It is an organic synthetic permeable cloth-like material used for soil conservation and erosion prevention

a. Geotextile
b. Geosynthetics
c. Geomeshscreen
d. both a and b
e. all of the above

A

d. both a and b

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9
Q

Open channel flow is uniform flow and the continuity equation applies when

a. energy grade line and hydraulic grade line are parallel
b. hydraulic grade line and channel bed are parallel
c. energy grade line and channel bed are parallel
d. energy grade line, hydraulic grade line, and channel bed are parallel
e. all of the above

A

d. energy grade line, hydraulic grade line, and channel bed are parallel

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10
Q

When the viscous forces are weak relative to inertial forces, the flow is

a. laminar
b. turbulent
c. transitional
d. critical
e. uniform

A

b. turbulent

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11
Q

A channel having a steep slope

a. flume
b. chute
c. drop spillway
d. drop inlet
e. spillway

A

b. chute

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12
Q

Is the elevation or vertical distance of the free water surface above a datum

a. stage
b. depth of flow
c. hydraulic depth
d. channel depth
e. both a and b

A

a. stage

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13
Q

The Manning’s roughness coefficient for grassed channels or waterways is specifically known as

a. resistance coefficient
b. retardance coefficient
c. impedance coefficient
d. none of the above
e. all of the above

A

b. retardance coefficient

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14
Q

The following measures accelerates channel flow, except,

a. channel deepening
b. channel straightening
c. channel widening
d. levees
e. vegetative control

A

e. vegetative control

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15
Q

The distance between adjacent terraces

a. horizontal distance
b. vertical distance
c. horizontal interval
d. vertical interval
e. none of the above

A

d. vertical interval

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16
Q

Which is not an element of flood routing?

a. inflow hydrograph
b. outflow hydrograph
c. spillway hydrograph
d. overflow discharge
e. available storage

A

d. overflow discharge

17
Q

Precipitation associated with the movement of air masses due to a difference in barometric pressure

a. convective
b. orographic
c. cyclonic
d. ITCZ
e. monsoon

A

c. cyclonic

18
Q

The method of determining average areal precipitation which accounts for the effect of topography and unequal gage density

a. arithmetic average
b. thiessen method
c. isohyetal method
d. both a and b
e. both b and c

A

e. both b and c

19
Q

Approximately ______ of the water extracted by the plant roots is transpired.

a. 75-79%
b. 80-84%
c. 85-89%
d. 90-94%
e. 95-99%

A

e. 95-99%

20
Q

The passage of water into the soil surface.

a. infiltration
b. seepage
c. percolation
d. leaching
e. both and b

A

a. infiltration

21
Q

Part of the runoff which travels over the ground surface and through the channels to reach the basin outlet.

a. surface runoff
b. overland flow
c. direct runoff
d. both a and b
e. all of the above

A

e. all of the above

22
Q

The time it takes for the runoff from the remotest point of the watershed to reach the outlet.

a. time to peak
b. time of concentration
c. recession time
d. runoff time
e. base time

A

b. time of concentration

23
Q

An equation or method used in the estimation and representation of evapotranspiration rate

a. Hargreaves Equation
b. Horton’s Equation
c. Lewis-Kostiakov Equation
d. Rational Equation
e. Gardner and Windsoe Equation

A

a. Hargreaves Equation

24
Q

Erosion which produces channels large enough to be obliterated by normal tillage

a. interill erosion
b. rill erosion
c. gully erosion
d. scour erosion
e. streambank erosion

A

c. gully erosion

25
Q

The rate of evapotranspiration occurring under field conditions for the given crop, soil moisture, and meteorological conditions

a. potential evapotranspiration
b. reference crop evapotranspiration
c. actual crop evapotranspiration
d. total crop evapotranspiration
e. none of the above

A

c. actual crop evapotranspiration

26
Q

Fraction of sheet and rill erosion that actually reaches has reference point of discharge

a. runoff coefficient
b. sediment coefficient
c. sediment delivery ratio
d. erosion delivery ratio
e. both c and d

A

c. sediment delivery ratio

27
Q

Water flows uniformly with a depth of 1.5 feet in a concrete-lined and trowel-finished trapezoidal canal (n=0.013) with a bottom width of 5 feet, side slope of 1:2, and a channel slope of 0.075%.

Find the discharge in m3/s.

a. 0.478
b. 0.487
c. 0.748
d. 0.784
e. 0.847

A

d. 0.784

28
Q

At what depth will water flow in a 3-m wide rectangular channel if
n=0.015
s= 0.05°
Q= 4 m3/s

a. 0.56 m
b. 0.66 m
c. 0.76 m
d. 0.86 m
e. 0.96 m

A

e. 0.96 m

29
Q

A trapezoidal main canal of a large River Irrigation System has a top and bottom width of 15m and 6m, respectively. The side slope is 1 ½:1 and the canal is lined with concrete, for which 𝘯 is assumed to be 0.015. If it is to carry 45 m3/s of water, what must be the grade of the canal, in percentage and in degrees?

a. 0.02%, 0.1°
b. 0.01%, 0.2°
c. 0.2%, 1°
d. 0.1%, 2°
e. 2%, 10°

A

a. 0.02%, 0.1°

30
Q

A trapezoidal main canal of a large River Irrigation System has a top and bottom width of 15m and 6m, respectively. The side slope is 1 ½:1 and the canal is lined with concrete, for which 𝘯 is assumed to be 0.015. If it is to carry 45 m3/s of water, what must be the grade of the canal, in percentage and in degrees?

(Refer to the Problem above) If the flow in the canal were to decrease by 15 m3/s. All other data, including slope being the same, what would be the depth of the water?

a. 1.45 m
b. 1.54 m
c. 2.45 m
d. 2.54 m
e. 3.45 m

A

c. 2.45 m

31
Q

If the most efficient of all trapezoidal cross sections can be used, what depth of open channel would you recommend to carry 100 cumecs with a with a velocity of 5 mps?

a. 1.4 m
b. 2.4 m
c. 3.4 m
d. 1.3 m
e. 2.3 m

A

c. 3.4 m

32
Q

The critical depth of a triangular smooth concrete flume (n=0.012) is 2.61 ft. If the side slope is 2:1, determine the discharge.

a. 80 cfs
b. 82 cfs
c. 84 cfs
d. 88 cfs
e. 92cfs

A

d. 88cfs

33
Q

A rain gage was inoperable during the month of June 2004. The rainfall totals for the three surrounding stations X, Y, Z during the same month are 5.50, 6.25, and 5.85 inches, respectively. The normal annual precipitation amounts of the station and of X, Y, Z are 80, 73, 79, and 86 inches, respectively. Estimate the amount of rainfall for the station on June 2004.

a. 4.70 in
b. 5.80 in
c. 5.83 in
d. 5.87 in
e. 5.90 in

A

d. 5.87 in

34
Q

A water impounding reservoir with a capacity of 1500 m3 was constructed on a catchment area of 100 ha. If the annual streamflow averages 12.5 cm and the annual sediment production is 4.26 m3/ha, what is the probable life of the reservoir before its capacity is reduced to 500 m3?

a. 6 years
b. 7 years
c. 8 years
d. 9 years
e. 10 years

A

c. 8 years

35
Q

What is the trap efficiency of the reservoir in Problem No. 34?

a. 15%
b. 20%
c. 25%
d. 30%
e. 35%

A

d. 30%

MSU-GSC: Part II (1 decks)

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