BRAE Midterm 1 Problem Sets & Top Hat Questions
correctly answered already passed
1. What is the common method for
A. Inches
describing how much water to apply to
meet the crop needs?
a Inches
b Gallons per minute
c Cubic feet
d Acres
2. Which of the following is considered a beneficial use D Soil Prepation
of water?
a Wind drift
b Deep percolation
c Uncollected runoff
d Soil preparation
3. Which of these can be a unit of A. Feet
pressure?
a ft
b gal
c sq in
d acre-in
4. An alfalfa crop uses 0.32 inches per day. How many o 4..32 =
14.25 days
days will it take to extract 4.52 inches from the soil? 14.1
5. An elevated water tank is used to feed water reservoir unt
into a drip system. How high (feet) must the it stands
tank outlet be in order to have 26 psi inches deep
pressure at the inlet to the drip system? What volum
of water ha
6. Water has been turned into a 4 acre been adde
,BRAE Midterm 1 Problem Sets & Top Hat Questions
correctly answered already passed
in ac-ft? 26 psi x 2.31 ft = 60.06
a1
b7
A. 1
12/ 12
,BRAE Midterm 1 Problem Sets & Top Hat Questions
correctly answered already passed
c 12
d 0.75
7. A pump must deliver water to an irrigation o 1 psi = 2.31 feet
system on the top of a hill, which is 192 feet o 192 feet / 2.31 feet =
above the pump. What should the pump 83.12
outlet pressure (psi) be in order to raise
water just to the top of the hill (ignore
losses)?
8. What salinity (ds/m) is equivalent to a soil 0.43 bars / 0.3 bars = 1.43
moisture tension of 0.43 bars? ds/m
a 1.23 B
b 1.43
c 1.54
d 1.70
9. A metric sprinkler catalog shows a sprinkler Convert kPa into feet of pres-
that delivers 0.50 liters per second (Lps) at sure
an operating
pressure of 314 kiloPascals (kPa). What is the sprin- 314 kPa x (1psi / 6.90
kPa) x
kler operating pressure in feet of water? (2.31 ft / 1 psi) = 105.2
10. An irrigation system applies a gross o Ett = 28 + = 29/45
amount of 45
inches of water during the growing season. An eval- 64.4
uation determines that: 28 inches goes to beneficial
satisfy crop ET; 9 inches runs off and is not leaching for
collected for reuse; 4.8 inches passes salt removal
through the root zone as deep percolation and 1 inch is
(total deep percolation), of which 1 inch is ET from
,BRAE Midterm 1 Problem Sets & Top Hat Questions
correctly answered already passed
weeds. What would the efficiency be if the • 29 / (45 - 9) = 29/36
gross application was reduced because the =
runoff was eliminated? 80.6% *runott was
a 64.4% eliminat- ed
b 70.5% C. 80.6%
correctly answered already passed
1. What is the common method for
A. Inches
describing how much water to apply to
meet the crop needs?
a Inches
b Gallons per minute
c Cubic feet
d Acres
2. Which of the following is considered a beneficial use D Soil Prepation
of water?
a Wind drift
b Deep percolation
c Uncollected runoff
d Soil preparation
3. Which of these can be a unit of A. Feet
pressure?
a ft
b gal
c sq in
d acre-in
4. An alfalfa crop uses 0.32 inches per day. How many o 4..32 =
14.25 days
days will it take to extract 4.52 inches from the soil? 14.1
5. An elevated water tank is used to feed water reservoir unt
into a drip system. How high (feet) must the it stands
tank outlet be in order to have 26 psi inches deep
pressure at the inlet to the drip system? What volum
of water ha
6. Water has been turned into a 4 acre been adde
,BRAE Midterm 1 Problem Sets & Top Hat Questions
correctly answered already passed
in ac-ft? 26 psi x 2.31 ft = 60.06
a1
b7
A. 1
12/ 12
,BRAE Midterm 1 Problem Sets & Top Hat Questions
correctly answered already passed
c 12
d 0.75
7. A pump must deliver water to an irrigation o 1 psi = 2.31 feet
system on the top of a hill, which is 192 feet o 192 feet / 2.31 feet =
above the pump. What should the pump 83.12
outlet pressure (psi) be in order to raise
water just to the top of the hill (ignore
losses)?
8. What salinity (ds/m) is equivalent to a soil 0.43 bars / 0.3 bars = 1.43
moisture tension of 0.43 bars? ds/m
a 1.23 B
b 1.43
c 1.54
d 1.70
9. A metric sprinkler catalog shows a sprinkler Convert kPa into feet of pres-
that delivers 0.50 liters per second (Lps) at sure
an operating
pressure of 314 kiloPascals (kPa). What is the sprin- 314 kPa x (1psi / 6.90
kPa) x
kler operating pressure in feet of water? (2.31 ft / 1 psi) = 105.2
10. An irrigation system applies a gross o Ett = 28 + = 29/45
amount of 45
inches of water during the growing season. An eval- 64.4
uation determines that: 28 inches goes to beneficial
satisfy crop ET; 9 inches runs off and is not leaching for
collected for reuse; 4.8 inches passes salt removal
through the root zone as deep percolation and 1 inch is
(total deep percolation), of which 1 inch is ET from
,BRAE Midterm 1 Problem Sets & Top Hat Questions
correctly answered already passed
weeds. What would the efficiency be if the • 29 / (45 - 9) = 29/36
gross application was reduced because the =
runoff was eliminated? 80.6% *runott was
a 64.4% eliminat- ed
b 70.5% C. 80.6%
