TCEQ Irrigator (Hydraulics) test
with 100% correct answers
2025/2026
What happens when there is excessive pressure at the heads ? -
ANSWER-Misting or fogging
If the GPM are doubled , the PSI : - ANSWER-quadruples .
Hydraulics is - ANSWER-the science of dynamic and static water
What is the weight of one gallon of water ? - ANSWER-8.3 pounds
62,4 pounds represents the weight of : - ANSWER-a cubic foot of water
.
What does PSI stand for ? - ANSWER-pounds per square inch
1|Page
,How many feet of water ( in height ) does it take to equal 1 PSI ? -
ANSWER-2.31
One foot high of water will create : - ANSWER-.433 PSI
How many feet of head are needed to produce 65 psi ? - ANSWER-
65/.433 =150.12 FOH
If you have 167 feet of head , what is the psi ? - ANSWER-167X433=
72.31 FOH
There is a 70 ' water tower on a hill that is 150 ' high . The water
pressure at a home , being serviced by this water tower , is 70 psl .
What is the feet of head difference between the home and the base of
the hill ? - ANSWER-58.3
An elevation gain in the piping will yield : - ANSWER-Loss in PSI
An elevation loss in the piping will yield : - ANSWER-an increase in psi
What is the maximum acceptable velocity of water in pvc piping ? -
ANSWER-5 fps
2|Page
, What is the maximum acceptable velocity of water in copper piping ! -
ANSWER-9fps
What is the water velocity of 1 " Class 200 pvc pipe flowing 12 gpm ? -
ANSWER-3.46fps
What is the water velocity of 1 ½ " Class 200 pvc pipe flowing 34 gpm ?
- ANSWER-4.83fps
What is the pressure loss for 80 ' of 1 " Class 200 pvc pipe flowing 16
gpm ? - ANSWER-2.49 psi
What is the pressure loss for 141 ' of 1 " Type K copper pipe flowing 12
gpm ? - ANSWER-6.97psi
What size Class 200 pvc pipe would be adequate if flowing 38 gpm ? .. -
ANSWER-2"
If your pipe is flowing 34 gpm , what size pipe should be used ? -
ANSWER-1 1/2"
how often does a licensed irrigator need to renew his license ? - once
every three years
which is /are the strategic goal/goals of TCEQ? - 1 - enforcement
3|Page
with 100% correct answers
2025/2026
What happens when there is excessive pressure at the heads ? -
ANSWER-Misting or fogging
If the GPM are doubled , the PSI : - ANSWER-quadruples .
Hydraulics is - ANSWER-the science of dynamic and static water
What is the weight of one gallon of water ? - ANSWER-8.3 pounds
62,4 pounds represents the weight of : - ANSWER-a cubic foot of water
.
What does PSI stand for ? - ANSWER-pounds per square inch
1|Page
,How many feet of water ( in height ) does it take to equal 1 PSI ? -
ANSWER-2.31
One foot high of water will create : - ANSWER-.433 PSI
How many feet of head are needed to produce 65 psi ? - ANSWER-
65/.433 =150.12 FOH
If you have 167 feet of head , what is the psi ? - ANSWER-167X433=
72.31 FOH
There is a 70 ' water tower on a hill that is 150 ' high . The water
pressure at a home , being serviced by this water tower , is 70 psl .
What is the feet of head difference between the home and the base of
the hill ? - ANSWER-58.3
An elevation gain in the piping will yield : - ANSWER-Loss in PSI
An elevation loss in the piping will yield : - ANSWER-an increase in psi
What is the maximum acceptable velocity of water in pvc piping ? -
ANSWER-5 fps
2|Page
, What is the maximum acceptable velocity of water in copper piping ! -
ANSWER-9fps
What is the water velocity of 1 " Class 200 pvc pipe flowing 12 gpm ? -
ANSWER-3.46fps
What is the water velocity of 1 ½ " Class 200 pvc pipe flowing 34 gpm ?
- ANSWER-4.83fps
What is the pressure loss for 80 ' of 1 " Class 200 pvc pipe flowing 16
gpm ? - ANSWER-2.49 psi
What is the pressure loss for 141 ' of 1 " Type K copper pipe flowing 12
gpm ? - ANSWER-6.97psi
What size Class 200 pvc pipe would be adequate if flowing 38 gpm ? .. -
ANSWER-2"
If your pipe is flowing 34 gpm , what size pipe should be used ? -
ANSWER-1 1/2"
how often does a licensed irrigator need to renew his license ? - once
every three years
which is /are the strategic goal/goals of TCEQ? - 1 - enforcement
3|Page
