TCEQ IRRIGATION LICENSE STUDY
GUIDE WITH COMPLETE SOLUTIONS
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.)
characteristics of flow vs pressure for given pipe size - ANSWER-as flow increases
pressure decreases velocity increases
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 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 cross-connection? - ANSWER-Any actual or potential connection between
a potable water supply and any source of contamination or pollution.
Definition of design pressure - ANSWER-
Definition of design pressure - ANSWER-Water in motion
Definition of high-hazard system? - ANSWER-Non-potable water, chemicals, fertilizers
Degree of hazard - ANSWER-A measure of the degree of risk or harm to the public's
health.
General installation requirements of BPA - ANSWER-Device must check/pass Back-
siphonage, Back-pressure, constant pressure, non-health hazard, health hazard.
Installation and inspection requirements for public water system to BPA - ANSWER-
Installation requirements of AVB - ANSWER--Installed 6" above the highest head or
outlet in the system.
GUIDE WITH COMPLETE SOLUTIONS
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.)
characteristics of flow vs pressure for given pipe size - ANSWER-as flow increases
pressure decreases velocity increases
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 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 cross-connection? - ANSWER-Any actual or potential connection between
a potable water supply and any source of contamination or pollution.
Definition of design pressure - ANSWER-
Definition of design pressure - ANSWER-Water in motion
Definition of high-hazard system? - ANSWER-Non-potable water, chemicals, fertilizers
Degree of hazard - ANSWER-A measure of the degree of risk or harm to the public's
health.
General installation requirements of BPA - ANSWER-Device must check/pass Back-
siphonage, Back-pressure, constant pressure, non-health hazard, health hazard.
Installation and inspection requirements for public water system to BPA - ANSWER-
Installation requirements of AVB - ANSWER--Installed 6" above the highest head or
outlet in the system.
