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AREA 2 (Recalled) > A2 - Recalled 1 (2015) > Flashcards

A2 - Recalled 1 (2015) Flashcards

1
Q

Minimum trajectory angle of sprinkler

A

10-25 degrees

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2
Q

allowable percentage depletion of most crops

A

50%

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3
Q

soil moisture tension with 15 atmosphere

A

permanent wilting point

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4
Q

the ratio of water beneficially used on the project, farm, or field to the amount of water delivered to the farm

A

water use efficiency

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5
Q

basic irrigation method for lowland farming

A

basin irrigation

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6
Q

irrigation method with high cost but low operation cost

A

overhead irrigation

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7
Q

irrigation method wherein water is directed to the base of the plant and is applied to the soil through small orifice

A

drip or trickle irrigation

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8
Q

laterals enter the submain from one side only to minimize the double drainage that occurs near the submain

A

gridiron layout

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9
Q

depth of shallow tube well

A

20 m or 60 ft

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10
Q

equation for evapotranspiration computation

A

penman-montieth equation

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11
Q

precipitation results from mechanical lifting of air mass over mountain barriers

A

orographic rainfall

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12
Q

travels over the ground and through the channels to reach the outlets

A

runoff

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13
Q

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

A

unit hydrograph

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14
Q

combination of splash and sheet erosion

A

interrill

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15
Q

flow greater than the critical flow

A

supercritical flow

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16
Q

type of flow wherein the discharge or flow in a prismatic channels is constant with respect to time

A

steady flow

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17
Q

irrigation components, related to flow and head

A

head gates

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18
Q

uses a thin wall of plastic, butyl, concrete, steel or wood to barrier against seepage through the wall

A

full diaphragm type

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19
Q

type of precipitation in the philippines

A

rain

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20
Q

referred to as rainfall

A

precipitation

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21
Q

standard height of an earth embankment

A

not exceeding 15 meters

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22
Q

an instrument used to determine the wind speed

A

anemometer

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23
Q

measures atmospheric humidity

A

hygrometer

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24
Q

A mathematical expression for the macroscopic flow of water through a porous system. It says that the discharge rate q is proportional to the gradient in the hydraulic head and the hydraulic conductivity

A

Darcy’s law

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25
Q

the composite parts of the irrigation system that divert water from natural bodies of water such as rivers, streams, and lakes.

A

headworks

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26
Q

a thin film of soil layer detached and transported by water flowing on the land surface.

A

sheet erosion

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27
Q

the type of surveying in which the surface of the earth is considered as a plane, or in which its spheroidal shape is neglected, with regard to horizontal distances and directions.

A

plane surveying

28
Q

the recommended pressure head variation in the lateral between the first and last sprinkler

A

20%

29
Q

what is the formula for the universal soil loss equation

A

E = RKLSCP

30
Q

Values of the USLE

A

E - annual soil erosion rate
R - rainfall-runoff erosivity factor
K - soil erodibility factor
L - slope length factor
S - slope factor
C - cover and crop management factor
P - erosion control practices or conservation practice factor

31
Q

soil property which describes the ability of the soil to transmit water

A

hydraulic conductivity

32
Q

the surface is rarely wet since the water is supplied from the soil underneath. This requires complete control of the water table so that the root zone is kept relatively free of excess water but is continually supplied with capillary moisture during the cropping season.

A

sub-irrigation

33
Q

what do you call the mountain side, with reference to the wind direction in which the air masses passing through it are cold and dry.

A

leeward

34
Q

the equation used in current meters is V=a+bN. what does “a” signifies?

A

starting velocity

35
Q

a type of survey that deals with the contour of the surveyed location

A

topographic surveying

36
Q

a type of geological formation underground that is a saturated formation of the earth. It not only stores the water but also yields it in adequate quantity. Main source of groundwater application.

A

aquifer

37
Q

an aquifer which has free water surface- which means the water table exists for this type of aquifer.

A

unconfined aquifer

38
Q

an aquifer that is trapped between 2 impermeable beds. The water in this type of aquifer will be under greater pressure which is greater than atmospheric pressure.

A

confined aquifer

39
Q

a saturated formation that permits water through it but does not yield water in sufficient quantity. Sandy clay is a n example of this formation.

A

aquitard

40
Q

a geological formation which is impermeable to the flow of water. It contains a large amount of water in it but does not permit water through it and also does not yield water.

A

aquiclude

41
Q

an impermeable geological formation which is neither porous nor permeable- which means it cannot store water in it and at the same time it cannot permit water through it.

A

aquifuge

42
Q

Water storage: yes
permeability of water: permeable
yield of water: yes
transmit: yes

A

aquifer

43
Q

Water storage: yes
permeability of water: party permeable
yield of water: yes, but slow yielding
transmit: yes

A

aquitard

44
Q

Water storage: yes
permeability of water: impermeable
yield of water: do not yield
transmit: no

A

aquiclude

45
Q

Water storage: no
permeability of water: impermeable
yield of water: do not yield
transmit: no

A

aquifuge

46
Q

type of surveying in which the mean surface of the earth is considered as a plane and the spheroidal shape is neglected

A

plane surveying

47
Q

type of surveying in which the shape of the earth is taken into account

A

geodetic surveying

48
Q

for the preparation of maps of large extents of territory

A

trigonometrical surveying

49
Q

a type of survey determines the relative locations of points (places) on the earth’s surface by measuring horizontal distances, differences in elevation and direction

A

topographic surveying

50
Q

the science of measurement and description of features which affect maritime navigation, maritime construction, dredging, offshore wind farms, and other related activities.

A

hydrographic surveying

51
Q

pump used on shallow tube well

A

centrifugal or jet pumps

52
Q

flow of water to the propeller of the propeller pump

A

axial

53
Q

forms in the aquifer around a pumping well as the water level decline

A

pumping cone

54
Q

it is the bouncing of sand grains as they are picked up, carried along, and dropped repeatedly by flowing water.

A

saltation

55
Q

Fr = 1

A

critical flow

56
Q

Fr > 1

A

supercritical flow

57
Q

Fr < 1

A

subritical flow

58
Q

it is used for 24-30% slope, contours cut into the hill slope in a step-like formation

A

bench terrace

59
Q

it is used for 9-24% slope, for maximum soil and water conservation

A

zingg/ conservation bench terrace

60
Q

stones are placed in a rectangular wire mesh, piled as blocks tied together, similar to check dams

A

gabions

61
Q

a method of irrigation in which parallel strips are used where the water flows down at a nearly uniform depth.

A

border irrigation

62
Q

in this method, water is applied to the crop field using small parallel channels to favor water infiltration while advancing down the field.

A

furrow irrigation

63
Q

darcy’s law states that the flow of water through a porous medium is proportional to the

A

medium’s hydraulic conductivity

64
Q

darcy’s law states that the flow of water through a porous medium is inversely proportional to the

A

length of flow path

65
Q
A

AREA 2 (Recalled) (1 decks)

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