EXAM 4

Question 1

Refers to the number of days between irrigation periods without rainfall.
a. irrigation frequency
b. irrigation efficiency
c. Irrigation method
d. irrigation period

Question 2

It is type of erosion where small channels are formed on the surface of
the soil
a. Splash
b. rill
c. sheet
d. gully

Question 3

One in which a definite law of certainty exists
a. Stochastic process
b. Probabilistic process
c. Deterministic process
d. Barrow process

Question 4

The other term for gravity well.
a. Confined well
b. Water table well
c. Deep well
d. Well on perched aquifer

Question 5

The no. of days allowed for operating irrigation to a given design area
during the peak consumptive period of the crop
a. irrigation method
being irrigated.
b. irrigation period
c. irrigation frequency
d. irrigation efficiency

Question 6

A storm type occuring at the boundaries of warm moist air and dry cold
air.
a. Orographic storm
b. Frontal storm
c. Convective storm
d. None of the above

Question 7

A property associated with surface tension of liquid and manifested in the
rise and fall of liquids in small diameter tubes.

a. conduction
b. capillary
c. cavitation
d. condensation

Question 8

Amount of rainfall in the rootzone.

a. consumptive use
b. seepage
c. percolation
d. effective rainfall

Question 9

A notch of regular form through which the irrigation stream is made to
flow and flow built as either portable or stationary structures is called:

a. orifice
b. parshall flume
c. weir
d. dam

Question 10

For the most efficient circular cross-section, semi-circle the hydraulic
radius is equal to:
a. ¼ its radius
c. ½ its radius
b. its radius
d. ¼ its diameter

Question 11

A hydraulic structure that serves as an outlet of water in irrigation
canals whereby water passes through and discharges into the main farm ditch
of service area is called
a. headgate
b. checkgate
c. turnout
d. offtake

Question 12

The amount of water used in producing crop is:
a. water holding capacity
c. rooting characteristics
b. critical growth stage
d. percolation

Question 13

Water that moves freely and drains out of the soil is:
a. gravitational
b. capillary
c. S.I.A.
d. hygroscopic

Question 14

In drainage, open channel is often referred to as:
a. canals
b. traps
c. manholes
d. drains

Question 15

The direct attraction of similar molecules between similar molecules.
a. collision
b. attraction
c. repulsion
d. cohesion

Question 16

A temporary method of drainage artificially produced in the subsoil with
digging a trench from the surface.
a. canal
b. flood routing
c. transition
d. mole drain

Question 17

The depth of water in mm or inches to be removed in 24 hr period from
the drainage area.
a. infiltration rate
b. drainage coefficient
c. infiltration
d. percolation

Question 18

Other terms for drip irrigation are __________ irrigation and __________
irrigation. This type of overhead irrigation operates at low pressure.
a. trickle – micro
b. sprinkle – slide
c. trickle – border
d. corrugation – trickle

Question 19

It is the average interval of time within the magnitude of given event
will be equaled or exceeded at least once on the average.
a. period of exceedence
b. hydrologic frequency
c. return period
d. all of the above

Question 20

Ratio of the bulk density to the density of water.
a. oven-dry weight
b. apparent specific gravity
c. soil volume
d. porosity

Question 21

In open channel, the term A/P is:
a. hydraulic gradient
b. hydraulic radius
c. hydraulic conductivity
d. hydraulics

Question 22

These are usually rural traders or barrio buyers who do accumulation of
the produce of individual farmers and bulk these for storage or for
distribution to wholesalers
a. assemblers
b. wholesalers
c. retailers
d. agents and brokers

Question 23

It is used to divide and distribute the flow of water at desired
direction usually placed or built in main farm ditch to divert water to
supplementary farm ditches.
a. spill wall
b. turnout
c. flume
d. division box

Question 24

In designing an open channel, it is necessary to know what the material
firming the channel bed is to know the value of:
a. roughness coefficient
b. side slope
c. bed slope
d. bottom slope

Question 25

This refers to wants for specific satisfiers backed up by an ability and willingness to buy them. a. need b. want c. demand d. value

Question 26

An irrigation method formed by building longitudinal levees approximately parallel to the contour and connecting them at a desirable places with levees at right angle. a. check contour b. border c. basin d. furrow

Question 27

A device used to control the flow of water to or from a pipeline. a. Inlet b. gate c. weir d. flume

Question 28

A closed conduit usually circular, square or rectangular in cross section, used for conveying water across and under an elevated roadway, embankment and dikes. a. gate b.culvert c.canal d.drop

Question 29

This is a marketing function which facilitates transfer of ownership a. assembly b. storage c. negotiation d. grading

Question 30

It also refers to consumptive use by crops. a. evapotranspiration b. water circulation c. saturation vapor pressure d. osmosis

Question 31

It is natural or artificial channel that shortens a meandering stream. a. cut off c. chutes b. drawdown d. transition

Question 31

A concept used to evaluate the losses of water during irrigation from the time it leaves that source to the point of use. a.irrigation efficiency c.Discharge flow rate b. drainage efficiency d. nota

Question 32

This is oftentimes not considered a marketing activity, but it is a marketing function. This is because agricultural products must pass through some levels of transformation before being made available to the users. This marketing function increases marketability of products by changing product forms. a. packaging/packing b. grading c. storage d. processing

Question 33

The most simple form of open channel flow computation is: a. unsteady uniform flow b. steady non-uniform flow c. steady uniform d. unsteady non-uniform

Question 34

These are intermediaries who deal directly with the end-users or the consumers. They are the wholesalers’ partners in distribution activities. a. agents b. retailers c. assemblers d. brokers

Question 35

The speed at which water flows in channel is: a. velocity b. discharge c. runoff d. volumetric flow

Question 36

It is equal to the cross-sectional area times the velocity of flow. a. velocity b. discharge c. evaporation d. runoff

Question 37

Water that moves freely and drains out of the soil is: a. hygroscopic water b. capillary water c. gravitational water d. sea water

Question 38

It is the state of felt deprivation of some basic satisfaction a. need b. want c. demand d. exchange

Question 39

It is the most elaborate method of computing potential evapotranspiration: a. Blaney-Criddle b. Jensen-Haise c. Hargreaves d. Penman

Question 40

Methods of supplying water in the basin a. direct supply and cascade supply b. flooding and pumping c. sprinkling and dripping d. wild flooding and pressurized supply

Question 41

It is anything offered for sale, attention, and acquisition a. prospect b. target market c. product d. market segment

Question 42

Which is not part of the macro-environment? a. demographic b. suppliers of raw materials c. technological d. politico-legal

Question 43

Same as interflow a. Surface runoff b. Subsurface runoff c. Groundwater runoff d. Runoff volume

Question 44

It is the ratio of the dry weight of the soil to the weight of the water with volume equal to the soil bulk volume. a. particle density b. bulk density c. real specific gravity d.apparent specific gravity

Question 45

It accounts for the losses in an irrigation system from the water source and prior to delivery of water into the field ditches. a. evaporation b. application efficiency c. diversion efficiency d. conveyance efficiency

Question 46

A geologic formation that contains water but do not have the capacity to transmit it. a. aquifuge b. aquifer c. aquitard d. aquiclude

Question 47

Farm water requirement minus the application losses is the_______. a. diversion water requirement b. farm irrigation requirement c. application efficiency d. land preparation water requirement

Question 48

This results from overlapping radii of influence of neighboring wells. a. drawdown c. well interference b. groundwater decline d. drawdown curve

Question 49

In furrow irrigation, the rate of water application should be __________ the intake rate of the soil. a. less than c. equal to b. greater than d. not related to

Question 50

Four liters per second is equal to a. 14.4 m3/hr c. both a and b b. 63.41 gpm d. neither a nor b

Question 51

Irrigation method used fore row crops wherein only a part of the surface is wetted. a. basin flooding c. border irrigation b. furrow irrigation d. border-strip flooding

Question 52

The amount of drainage water to be removed per unit time per unit area is the____. a. drainage requirement c. drain spacing b. drainage coefficient d. drainage volume

Question 53

In Hooghoudt’s drain spacing formula it is assumed that _____. a. The water table is in equilibrium w/ the rainfall or irrigation water. b. The drains are evenly spaced. c. Darcy’s law is valid for flow through the soils. d. All of the above.

Question 53

______ is a mathematical expression for the macroscopic flow of water through a porous system. a. Steady state groundwater flow equation b. Darcy’s Law c. Laplace Equation d. Scobey’s Equation

Question 54

It is the soil moisture constant describing the amount of moisture retained by the soil against a suction pressure of 1/3 atmosphere. a. field capacity b. hygroscopic moisture c. permanent wilting point d. saturation point

Question 55

The infiltration equation based on the exhaustion process is the _____. a. Lewis-Kostiakov’s b. Horton’s c. Philip’s d. Darcy’s

Question 56

Run-off is the difference between the gross depth of irrigation water and the____. a. net depth requirement b. depth that infiltrated c. crop evapotranspiration d. water use rate

Question 57

It is the type of sprinkler irrigation system where the number of laterals installed is equal to the total number of lateral positions. a. hand move system b. periodic move c. special type d. set system

Question 58

Computer aided method wherein it averages estimated precipitation at all points of a superimposed grid. a. Inverse Distance Ratio Method b. Grid-Point Method c. Isohyetal d. Thiessen polygon

Question 59

When soil water reaches or falls below _________, irrigation should be done. a. 43.2 mm c. 288 mm b. 270 mm d. 360mm

Question 60

Natural drainage occurs when the soil water reaches or exceeds a depth of _____. a. 43.2 mm c. 288 mm b. 270 mm d. 360mm

Question 61

It is a surface irrigation system where the area is subdivided by dikes and water flows over these dikes from one subdivision to another. a. border irrigation c. basin irrigation b. furrow irrigation d. corrugation irrigation

Question 62

Distribution control structures placed across an irrigation ditch to block the flow temporarily and to raise the upstream water level. a. turnouts c. culverts b. checks d. weirs

Question 63

Which is not a component of the impact arm of an impact sprinkler? a. nozzle b. counterweight c. vane d. spoon

Question 64

Used when there is skewness in the data distribution a. Gamma Density Function b. Pearson Type III Distribution c. Log-Normal Distribution d. Normal Distribution

Question 65

Governed by chance; time series INDEPENDENT a. Stochastic process b. Probabilistic process c. Deterministic process d. Barrow process

Question 66

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 b. Grid-Point Method c. Isohyetal d. Thiessen polygon

Question 67

This method can be used if there is a piped water-distribution system where a hose pipe can be connected to a tap or outlet and there is enough pressure in the water as it emerges from the hose pipe a. Hose pipe b. Watering can c. Drainage d. Overhead irrigation

Question 68

In surface irrigation, the ratio between the gross amount of irrigation water and the net requirement of the crop is the _____ a. application efficiency c. seepage b. deep percolation d. runoff

Question 69

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

Question 70

A 21.6mm/day water requirement is equivalent to a. 23.8 gpm/ha c. 2.5 lps/ha b. 0.9 lps/ha d. 14.3 gpm/ha

Question 71

In the furrow irrigation, it is the difference between the depth of water that infiltrated and the net depth requirement is the a. runoff c. deep percolation b. application losses d. seepage