TCEQ Irrigation License Study Guide Questions And
Answers Already Passed!!
What are the two types of back-flow? - ✔✔✔ANSWER-Back pressure and
Back siphonage
characteristics of looped irrigation main lines - ✔✔✔ANSWER-1/2 flow gym
by 1/2 pipe > low pressure, loss downsize pipe, both at the same time.
characteristics of flow vs pressure for given pipe size - ✔✔✔ANSWER-as
flow increases pressure decreases velocity increases
Characteristics of water - ✔✔✔ANSWER-non compress-able, potable, non
potable
Common units of measure for flow rate in landscape irrigation -
✔✔✔ANSWER-(GPM, gallons per minute) (GPH,Gallons per hour), (IPH,
Inches per hour)
Conversion of psi to feet (head) of water - ✔✔✔ANSWER-1' = .433 PSI
2.31'= 1 PSI
, Definition of design pressure - ✔✔✔ANSWER-Water in motion
Definition of design pressure - ✔✔✔ANSWER-
BPA requirements for fertilizer injection system - ✔✔✔ANSWER-Reduced
Pressure Principle Assembly (RPPA) (RPZ) is required when fertilizer injection
are being used.
Causes backsiphonage? - ✔✔✔ANSWER-Caused by a negative or Sub-
atmospheric pressure. Example-City departments are using fire hydrant or there's a
city main line break, or someone sucking liquid from a glass using a straw.
Causes of leaking check valve - ✔✔✔ANSWER-Debris-can enter the valve.
(Can use Y strainer to provide a solution.)
Definition of high-hazard system? - ✔✔✔ANSWER-Non-potable water,
chemicals, fertilizers
Definition of cross-connection? - ✔✔✔ANSWER-Any actual or potential
connection between a potable water supply and any source of contamination or
pollution.
Answers Already Passed!!
What are the two types of back-flow? - ✔✔✔ANSWER-Back pressure and
Back siphonage
characteristics of looped irrigation main lines - ✔✔✔ANSWER-1/2 flow gym
by 1/2 pipe > low pressure, loss downsize pipe, both at the same time.
characteristics of flow vs pressure for given pipe size - ✔✔✔ANSWER-as
flow increases pressure decreases velocity increases
Characteristics of water - ✔✔✔ANSWER-non compress-able, potable, non
potable
Common units of measure for flow rate in landscape irrigation -
✔✔✔ANSWER-(GPM, gallons per minute) (GPH,Gallons per hour), (IPH,
Inches per hour)
Conversion of psi to feet (head) of water - ✔✔✔ANSWER-1' = .433 PSI
2.31'= 1 PSI
, Definition of design pressure - ✔✔✔ANSWER-Water in motion
Definition of design pressure - ✔✔✔ANSWER-
BPA requirements for fertilizer injection system - ✔✔✔ANSWER-Reduced
Pressure Principle Assembly (RPPA) (RPZ) is required when fertilizer injection
are being used.
Causes backsiphonage? - ✔✔✔ANSWER-Caused by a negative or Sub-
atmospheric pressure. Example-City departments are using fire hydrant or there's a
city main line break, or someone sucking liquid from a glass using a straw.
Causes of leaking check valve - ✔✔✔ANSWER-Debris-can enter the valve.
(Can use Y strainer to provide a solution.)
Definition of high-hazard system? - ✔✔✔ANSWER-Non-potable water,
chemicals, fertilizers
Definition of cross-connection? - ✔✔✔ANSWER-Any actual or potential
connection between a potable water supply and any source of contamination or
pollution.
