問題一覧
1
In selecting the optimum capacity of the reservoir of a SWIM Project for irrigation purposes, the reliability of the reservoir should be above
80-85%
2
Discharge is constant with respect to time
Steady flow
3
A triangular plot of land is to be used as a vegetable garden. The measures of the plot are AB = 8 meters, BC = 12 meters and AC = 18 meters. Find the measure of angle B. (COSINE LAW)
127.2°
4
The mass of radium-226 is given by. Its half-life is 1,590 years. A sample radium-226 has a mass of 100 mg. Find the mass after 1,000 years.
65 mg
5
It is the water retained about individual soil particles by molecular action and can remove only by heating
Hydroscopic water
6
The selling price P of an item is 100 – 0.02x pesos, where x is the number of items produced per day. If the cost C of producing and selling x items is 40x + 15,000 pesos per day, how many items should be produced and sold every day in order to maximize the profit?
1, 500
7
A level land surrounded by earth bunds in which water can be ponded unti it infiltrates into the soil
Basin
8
A ladder 10 feet long rests against a vertical wall. If the bottom of the ladder slides away from the wall at a rate of 1 ft/sec, how fast is the top of the ladder sliding down the wall when the bottom of the ladder is 6 feet from the wall?
-0.75 ft/sec
9
The soil which contain more or less equal amounts of sand, silt and clay
Loam soils
10
A water tank has the shape of an inverted circular cone with the base radius 2 meters and height 4 meters. If water is being pumped into the tank at a rate of 2 m3/minute, find the rate at which the water level is rising when the water is 3 meters deep.
0.28 m/mi
11
The attraction of water into a hair like opening which defend both on cohesion of the liquid and on the adhesion of the liquid to solid wall.
Capillary
12
A pond bottom slope of 2000:1 is equivalent to
0.05 % slope
13
The phase from germination to panicle initiation in the life cycle of rice plant.
Vegetative phase
14
This is provided in a pipe drain to prevent seepage:
Collar
15
The process by which elevation of space grid points in the field are determined
Topographic leveling
16
These two culture systems in open water are considered as enclosure culture systems:
Pens and cages
17
The ratio of peak rate of runoff to the rainfall intensity is
Runoff coefficient
18
Size up the nozzle for a sprinkler irrigation system given the following: application rate, mm/hr 12 operating pressure, kPa 500 irrigated area, m2 250 discharge coefficient 0.80
6.5 mm
19
In a critical flow, the flow specific energy is (X) for a given discharge, and the discharge is (Y) for a given specific energy.
X = minimum; Y = maximum
20
The time required for water to flow from the most remote point of the watershed to the outlet is
Time of concentration
21
The scientific name of tobacco is:
Nicotiana tabacum
22
It is the most important consideration for the side slope of a channel.
kind of channel material
23
The most common method of conveying water for irrigation is
Open channel
24
The velocity of water passed in a cross sectional area
Discharge
25
The arrangement of individual soil particles with respect to each other into pattern is called:
Soil structure
26
This is a colorless and odorless gas at ambient concentrations and is a major component of smog. It irritates the respiratory tract and eyes. Exposure to high levels results in chest tightness, coughing and wheezing. People with respiratory and heart problems are at a higher risk. What is this gas?
carbon monoxide
27
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
Gabions
28
If too much water is applied in to the soil it is loss as flood this term is
Runoff
29
This is the most widely used for irrigating row crops where water is confined to small channel between the crop row
furrow
30
A reservoir, with water surface area averaging 6 km2, reads 100 m in its monitoring gauge. The reservoir is being replenished by a 5000-ha watershed wherein 85% of the total rainfall that falls in the watershed reaches the reservoir. What rainfall depth is needed to raise the water level of the reservoir by 4 meters?
565 mm
31
The energy is commonly associated with fluid flow are potential, kinetic and
Mechanica
32
[object Object]
Find the area of the shaded region assuming the radius of the circle is 6.0 m.
44.22 m2
33
In a certain farming area, the probability that it will rain on a November day is 0.60, the probability that a rainy November day will be followed by another rainy day is 0.80, and the probability that a sunny November day will be followed by a rainy day is 0.30. What is the probability that it will rain, rain, not rain, and rain in this place on four consecutive November days?
0.0288
34
The direct result of the molecular attraction between molecules is
Repulsion
35
The wet land preparation for planting rice consists of soaking, plowing, and puddling. The third step (puddling) involves harrowing or rotavating of land under shallow submerged conditions. The following are the functions of puddling, except:
destruction of soil aggregates and macro-pore volume
36
The ratio of the density of material to the density of water at 4 degree Celcius
Specific density
37
Scientific name of santol.
Sandoricum koetjape
38
A measured of the variability of viscosity has been established with a numerical designation is called
Dynamic viscosity
39
Which employs price-lining techniques?
P99-store
40
Attraction of unlike molecules is
Cohesion
41
Type of rainfall cause by the upward lifting of the air mass due a mountain:
Orographic
42
What do called the mountain side, with reference to the wind direction in which the air masses passing through it is clod and dry:
Trade wind
43
Compute the land soaking requirement for a soil (depth of rootzone = 25 cm) with residual moisture content of 15% by weight, bulk density of 1,200 kg/m3 and porosity of 42%. Standing water for planting is 30 mm.
90 mm
44
A property associated with a surface tension of a liquid and manifested in the rise and fall of a liquid in small diameter tube
Capillary
45
If sprinkler irrigation is applied to an area with many irregular or curved boundaries, what is the appropriate pattern to be used?
square
46
A gas
Can be compressed
47
The pressure at which a liquid boils is
Vapor pressure
48
The basic form of energy loss in flow equation stating that the energy loss is directly proportional to the some friction factor, the length of the system and the kinetic energy level and inversely proportional to the diameter of the conductor
Darcy equation
49
Which is true about unconfined aquifer?
It is also known as phreatic aquifer.
50
A device for measuring temperature based on the electrical difference of two materials.
Thermocouple
51
Fluid moves in parallel layers with no cross-currents; Re <= 2000
Laminar flow
52
Bianca is twice as old as Pio and Meggie is twice as old as Bianca. In ten years, their combined ages will be 58. How old is Bianca now?
8 yrs
53
A highly efficient variable head flow meter whose restriction contracts and expand very slowly
Venturi
54
At what time will the acceleration of the object moving in rectilinear motion whose position after t seconds is defined by s(t) = t5 – 80t2 be zero?
2.00 sec
55
These are breaks which occur in channel bank causing water to spilled from the channel in an uncontrolled manner
.Breaches
56
What three most important factors input into the determination of prices?
cost, demand, competition
57
The soil property which described the ability of the soil to transmit water
Hydraulic conductivity
58
Graphical representation of instantaneous runoff rate against time :
Hydrograph
59
Irrigation systems that have relatively large service areas and are managed by government agencies.
NIS
60
It is the natural and synthetic hydrograph for one unit of direct runoff from the catchments in a specific unit of time:
Unit hydrograph
61
It is the ratio of water stored in the root zone during the irrigation to the water needed in the root zone prior to irrigation, expressed in percent.
water storage efficiency
62
Removal of soil by water from small but well defined channels when there is concentration of over land flow
Stream channel erosion
63
The velocities at 0.2 and 0.8 of the depth of flow in a parabolic open channel are 1.0 m/s and 0. 2 m/s, respectively. If the flow depth is 0.5 m and the top width is 1.5 m, the discharge is.
300 lps
64
If the width of a pump impeller is increased by 20%, how much will the increase in the discharge be?
20%
65
When is the best/recommended time to sample sediment load in the stream
Peak flow
66
Which is not true about pipe flow?
Flow is subjected to atmospheric pressure.
67
A super critical flow is a flow condition where:
Fr >1
68
The USLE is a method of computing soil erosion. What type of soil erosion does it estimate?
Sheet and rill erosion only
69
The peak runoff in a 50 ha-watershed corresponding to a rainfall intensity of 25 mm/hr and a runoff coefficient of 0.8 is
2.8m3/s
70
A horizontally fully flowing 2-inch pipe, with a discharge coefficient of 0.97, is discharging water. What is the discharge of the pipe if the X and Y coordinates of the water trajectory measured from the end of the pipe are 1.3 m and 0.9 m, respectively?
6.0 lps
71
Type of flow wherein the discharge or flow in a prismatic channel is constant with respect to time
Steady flow
72
Assume that the pipe is repositioned with its mouth upwards. If the vertical rise of the water jet is 0.55 m, what will be the discharge of the pipe?
6.5 lps
73
Type of sediment load along the stream characterized as sediments that are sometimes stationary or sometimes carried by the water along the stream
Saltating load
74
The critical depth in a rectangular channel with a bottom width of 4.0 m for a discharge of 5 m3/s is
0.54m
75
For soil with higher organic matter content, soil erosion is
lower
76
Who is a merchant?
Someone who buys and resells commodities.
77
The quantity of water exclusive of precipitation required to maintain desired soil moisture and salinity level during the crop season
Irrigation water requirement
78
For a canal with capacity of 20 cfs, 1.5 coefficient, and water depth of 5.0 m, what is the freeboard?
5.0 ft
79
Darcy's law states that the flow of water through a porous medium is
Both a and b
80
A smooth metal flume (n=0.012) of semi-circular cross-section has a diameter of 1.8 m and a slope of 0.005. What diameter of corrugated metal flume (n=0.025) will be required for the same capacity?
2.4 m
81
Refer to the short-period variations in the atmosphere
Weather
82
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.
temperature
83
Characterized by a vertically isothermal structure in the lower portion followed by increasing temperature in the upper portion
Stratosphere
84
The peak runoff in the mainstream of a watershed has a mean of 128m3/s and a standard deviation of 52m3/s. If the sample data is normally distributed, the magnitude of runoff corresponding to a probability of exceedance of 16% is
180m3/s
85
Which does not belong to the group?
Ayshire
86
Most of the thermosphere.
Exosphere
87
PVC means:
poly vinyl chloride
88
The most stable and chief component of most soil on a volumetric basis.
Mineral particles
89
Which is not a correct description of a soil erosion plot which is used to experimentally measure soil erosion?
7.26 feet high
90
Upper part of the thermosphere, where earth magnetic field is more important than gravitational field in controlling the behaviors of proton
Protosphere
91
Which is true about infiltration?
It has a high initial rate that diminishes with time.
92
Average lapse rate in troposphere
6.5 C/km
93
A centrifugal pump is used to irrigate an entire field. But upon starting the engine, the pump has shakes and produces too much noise. Worse, the water discharged has inconsistent flow.
What is the probable remedy for the uneven water discharge?
tighten defective gland packing
94
A centrifugal pump is used to irrigate an entire field. But upon starting the engine, the pump has shakes and produces too much noise. Worse, the water discharged has inconsistent flow.
How will the problem on vibration and noise be solved?
check if impeller and casing rub
95
Lower part of the thermosphere, ionized layer which the long distance radio communication is possible.
Ionosphere
96
The average cross-sectional area of a stream is 4 m2 and the maximum velocity of flow is noted at 4.2 m/s. Estimate the stream discharge by float method.
11.2 m3/s
97
At what time where the sun is farthest distance from the earth
Aphelion
98
A culvert has been designed for a flood discharge with a return period of 50 years. The risk that the culvert will experience the design flood one or more times in 75 years is
78%
99
What factors would lead a marketer to adopt a going-rate pricing strategy?
There are no product differentiation and competitor moves are uncertain.
100
Refers to the long period manifested by weather
Climate
TCEP EXAM 1
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69問 • 10ヶ月前問題一覧
1
In selecting the optimum capacity of the reservoir of a SWIM Project for irrigation purposes, the reliability of the reservoir should be above
80-85%
2
Discharge is constant with respect to time
Steady flow
3
A triangular plot of land is to be used as a vegetable garden. The measures of the plot are AB = 8 meters, BC = 12 meters and AC = 18 meters. Find the measure of angle B. (COSINE LAW)
127.2°
4
The mass of radium-226 is given by. Its half-life is 1,590 years. A sample radium-226 has a mass of 100 mg. Find the mass after 1,000 years.
65 mg
5
It is the water retained about individual soil particles by molecular action and can remove only by heating
Hydroscopic water
6
The selling price P of an item is 100 – 0.02x pesos, where x is the number of items produced per day. If the cost C of producing and selling x items is 40x + 15,000 pesos per day, how many items should be produced and sold every day in order to maximize the profit?
1, 500
7
A level land surrounded by earth bunds in which water can be ponded unti it infiltrates into the soil
Basin
8
A ladder 10 feet long rests against a vertical wall. If the bottom of the ladder slides away from the wall at a rate of 1 ft/sec, how fast is the top of the ladder sliding down the wall when the bottom of the ladder is 6 feet from the wall?
-0.75 ft/sec
9
The soil which contain more or less equal amounts of sand, silt and clay
Loam soils
10
A water tank has the shape of an inverted circular cone with the base radius 2 meters and height 4 meters. If water is being pumped into the tank at a rate of 2 m3/minute, find the rate at which the water level is rising when the water is 3 meters deep.
0.28 m/mi
11
The attraction of water into a hair like opening which defend both on cohesion of the liquid and on the adhesion of the liquid to solid wall.
Capillary
12
A pond bottom slope of 2000:1 is equivalent to
0.05 % slope
13
The phase from germination to panicle initiation in the life cycle of rice plant.
Vegetative phase
14
This is provided in a pipe drain to prevent seepage:
Collar
15
The process by which elevation of space grid points in the field are determined
Topographic leveling
16
These two culture systems in open water are considered as enclosure culture systems:
Pens and cages
17
The ratio of peak rate of runoff to the rainfall intensity is
Runoff coefficient
18
Size up the nozzle for a sprinkler irrigation system given the following: application rate, mm/hr 12 operating pressure, kPa 500 irrigated area, m2 250 discharge coefficient 0.80
6.5 mm
19
In a critical flow, the flow specific energy is (X) for a given discharge, and the discharge is (Y) for a given specific energy.
X = minimum; Y = maximum
20
The time required for water to flow from the most remote point of the watershed to the outlet is
Time of concentration
21
The scientific name of tobacco is:
Nicotiana tabacum
22
It is the most important consideration for the side slope of a channel.
kind of channel material
23
The most common method of conveying water for irrigation is
Open channel
24
The velocity of water passed in a cross sectional area
Discharge
25
The arrangement of individual soil particles with respect to each other into pattern is called:
Soil structure
26
This is a colorless and odorless gas at ambient concentrations and is a major component of smog. It irritates the respiratory tract and eyes. Exposure to high levels results in chest tightness, coughing and wheezing. People with respiratory and heart problems are at a higher risk. What is this gas?
carbon monoxide
27
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
Gabions
28
If too much water is applied in to the soil it is loss as flood this term is
Runoff
29
This is the most widely used for irrigating row crops where water is confined to small channel between the crop row
furrow
30
A reservoir, with water surface area averaging 6 km2, reads 100 m in its monitoring gauge. The reservoir is being replenished by a 5000-ha watershed wherein 85% of the total rainfall that falls in the watershed reaches the reservoir. What rainfall depth is needed to raise the water level of the reservoir by 4 meters?
565 mm
31
The energy is commonly associated with fluid flow are potential, kinetic and
Mechanica
32
[object Object]
Find the area of the shaded region assuming the radius of the circle is 6.0 m.
44.22 m2
33
In a certain farming area, the probability that it will rain on a November day is 0.60, the probability that a rainy November day will be followed by another rainy day is 0.80, and the probability that a sunny November day will be followed by a rainy day is 0.30. What is the probability that it will rain, rain, not rain, and rain in this place on four consecutive November days?
0.0288
34
The direct result of the molecular attraction between molecules is
Repulsion
35
The wet land preparation for planting rice consists of soaking, plowing, and puddling. The third step (puddling) involves harrowing or rotavating of land under shallow submerged conditions. The following are the functions of puddling, except:
destruction of soil aggregates and macro-pore volume
36
The ratio of the density of material to the density of water at 4 degree Celcius
Specific density
37
Scientific name of santol.
Sandoricum koetjape
38
A measured of the variability of viscosity has been established with a numerical designation is called
Dynamic viscosity
39
Which employs price-lining techniques?
P99-store
40
Attraction of unlike molecules is
Cohesion
41
Type of rainfall cause by the upward lifting of the air mass due a mountain:
Orographic
42
What do called the mountain side, with reference to the wind direction in which the air masses passing through it is clod and dry:
Trade wind
43
Compute the land soaking requirement for a soil (depth of rootzone = 25 cm) with residual moisture content of 15% by weight, bulk density of 1,200 kg/m3 and porosity of 42%. Standing water for planting is 30 mm.
90 mm
44
A property associated with a surface tension of a liquid and manifested in the rise and fall of a liquid in small diameter tube
Capillary
45
If sprinkler irrigation is applied to an area with many irregular or curved boundaries, what is the appropriate pattern to be used?
square
46
A gas
Can be compressed
47
The pressure at which a liquid boils is
Vapor pressure
48
The basic form of energy loss in flow equation stating that the energy loss is directly proportional to the some friction factor, the length of the system and the kinetic energy level and inversely proportional to the diameter of the conductor
Darcy equation
49
Which is true about unconfined aquifer?
It is also known as phreatic aquifer.
50
A device for measuring temperature based on the electrical difference of two materials.
Thermocouple
51
Fluid moves in parallel layers with no cross-currents; Re <= 2000
Laminar flow
52
Bianca is twice as old as Pio and Meggie is twice as old as Bianca. In ten years, their combined ages will be 58. How old is Bianca now?
8 yrs
53
A highly efficient variable head flow meter whose restriction contracts and expand very slowly
Venturi
54
At what time will the acceleration of the object moving in rectilinear motion whose position after t seconds is defined by s(t) = t5 – 80t2 be zero?
2.00 sec
55
These are breaks which occur in channel bank causing water to spilled from the channel in an uncontrolled manner
.Breaches
56
What three most important factors input into the determination of prices?
cost, demand, competition
57
The soil property which described the ability of the soil to transmit water
Hydraulic conductivity
58
Graphical representation of instantaneous runoff rate against time :
Hydrograph
59
Irrigation systems that have relatively large service areas and are managed by government agencies.
NIS
60
It is the natural and synthetic hydrograph for one unit of direct runoff from the catchments in a specific unit of time:
Unit hydrograph
61
It is the ratio of water stored in the root zone during the irrigation to the water needed in the root zone prior to irrigation, expressed in percent.
water storage efficiency
62
Removal of soil by water from small but well defined channels when there is concentration of over land flow
Stream channel erosion
63
The velocities at 0.2 and 0.8 of the depth of flow in a parabolic open channel are 1.0 m/s and 0. 2 m/s, respectively. If the flow depth is 0.5 m and the top width is 1.5 m, the discharge is.
300 lps
64
If the width of a pump impeller is increased by 20%, how much will the increase in the discharge be?
20%
65
When is the best/recommended time to sample sediment load in the stream
Peak flow
66
Which is not true about pipe flow?
Flow is subjected to atmospheric pressure.
67
A super critical flow is a flow condition where:
Fr >1
68
The USLE is a method of computing soil erosion. What type of soil erosion does it estimate?
Sheet and rill erosion only
69
The peak runoff in a 50 ha-watershed corresponding to a rainfall intensity of 25 mm/hr and a runoff coefficient of 0.8 is
2.8m3/s
70
A horizontally fully flowing 2-inch pipe, with a discharge coefficient of 0.97, is discharging water. What is the discharge of the pipe if the X and Y coordinates of the water trajectory measured from the end of the pipe are 1.3 m and 0.9 m, respectively?
6.0 lps
71
Type of flow wherein the discharge or flow in a prismatic channel is constant with respect to time
Steady flow
72
Assume that the pipe is repositioned with its mouth upwards. If the vertical rise of the water jet is 0.55 m, what will be the discharge of the pipe?
6.5 lps
73
Type of sediment load along the stream characterized as sediments that are sometimes stationary or sometimes carried by the water along the stream
Saltating load
74
The critical depth in a rectangular channel with a bottom width of 4.0 m for a discharge of 5 m3/s is
0.54m
75
For soil with higher organic matter content, soil erosion is
lower
76
Who is a merchant?
Someone who buys and resells commodities.
77
The quantity of water exclusive of precipitation required to maintain desired soil moisture and salinity level during the crop season
Irrigation water requirement
78
For a canal with capacity of 20 cfs, 1.5 coefficient, and water depth of 5.0 m, what is the freeboard?
5.0 ft
79
Darcy's law states that the flow of water through a porous medium is
Both a and b
80
A smooth metal flume (n=0.012) of semi-circular cross-section has a diameter of 1.8 m and a slope of 0.005. What diameter of corrugated metal flume (n=0.025) will be required for the same capacity?
2.4 m
81
Refer to the short-period variations in the atmosphere
Weather
82
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.
temperature
83
Characterized by a vertically isothermal structure in the lower portion followed by increasing temperature in the upper portion
Stratosphere
84
The peak runoff in the mainstream of a watershed has a mean of 128m3/s and a standard deviation of 52m3/s. If the sample data is normally distributed, the magnitude of runoff corresponding to a probability of exceedance of 16% is
180m3/s
85
Which does not belong to the group?
Ayshire
86
Most of the thermosphere.
Exosphere
87
PVC means:
poly vinyl chloride
88
The most stable and chief component of most soil on a volumetric basis.
Mineral particles
89
Which is not a correct description of a soil erosion plot which is used to experimentally measure soil erosion?
7.26 feet high
90
Upper part of the thermosphere, where earth magnetic field is more important than gravitational field in controlling the behaviors of proton
Protosphere
91
Which is true about infiltration?
It has a high initial rate that diminishes with time.
92
Average lapse rate in troposphere
6.5 C/km
93
A centrifugal pump is used to irrigate an entire field. But upon starting the engine, the pump has shakes and produces too much noise. Worse, the water discharged has inconsistent flow.
What is the probable remedy for the uneven water discharge?
tighten defective gland packing
94
A centrifugal pump is used to irrigate an entire field. But upon starting the engine, the pump has shakes and produces too much noise. Worse, the water discharged has inconsistent flow.
How will the problem on vibration and noise be solved?
check if impeller and casing rub
95
Lower part of the thermosphere, ionized layer which the long distance radio communication is possible.
Ionosphere
96
The average cross-sectional area of a stream is 4 m2 and the maximum velocity of flow is noted at 4.2 m/s. Estimate the stream discharge by float method.
11.2 m3/s
97
At what time where the sun is farthest distance from the earth
Aphelion
98
A culvert has been designed for a flood discharge with a return period of 50 years. The risk that the culvert will experience the design flood one or more times in 75 years is
78%
99
What factors would lead a marketer to adopt a going-rate pricing strategy?
There are no product differentiation and competitor moves are uncertain.
100
Refers to the long period manifested by weather
Climate