TCEQ IRRIGATION LICENSE STUDY
GUIDE
BPA requirements for fertilizer injection system - Correct Answers -Reduced Pressure
Principle Assembly (RPPA) (RPZ) is required when fertilizer injection are being used.
Causes backsiphonage? - Correct Answers -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 - Correct Answers -Debris-can enter the valve. (Can use
Y strainer to provide a solution.)
Definition of high-hazard system? - Correct Answers -Non-potable water, chemicals,
fertilizers
Definition of cross-connection? - Correct Answers -Any actual or potential connection
between a potable water supply and any source of contamination or pollution.
What are the two types of back-flow? - Correct Answers -Back pressure and Back
siphonage
characteristics of looped irrigation main lines - Correct Answers -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 - Correct Answers -as flow
increases pressure decreases velocity increases
Characteristics of water - Correct Answers -non compress-able, potable, non potable
Common units of measure for flow rate in landscape irrigation - Correct Answers -
(GPM, gallons per minute) (GPH,Gallons per hour), (IPH, Inches per hour)
Degree of hazard - Correct Answers -A measure of the degree of risk or harm to the
public's health.
GUIDE
BPA requirements for fertilizer injection system - Correct Answers -Reduced Pressure
Principle Assembly (RPPA) (RPZ) is required when fertilizer injection are being used.
Causes backsiphonage? - Correct Answers -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 - Correct Answers -Debris-can enter the valve. (Can use
Y strainer to provide a solution.)
Definition of high-hazard system? - Correct Answers -Non-potable water, chemicals,
fertilizers
Definition of cross-connection? - Correct Answers -Any actual or potential connection
between a potable water supply and any source of contamination or pollution.
What are the two types of back-flow? - Correct Answers -Back pressure and Back
siphonage
characteristics of looped irrigation main lines - Correct Answers -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 - Correct Answers -as flow
increases pressure decreases velocity increases
Characteristics of water - Correct Answers -non compress-able, potable, non potable
Common units of measure for flow rate in landscape irrigation - Correct Answers -
(GPM, gallons per minute) (GPH,Gallons per hour), (IPH, Inches per hour)
Degree of hazard - Correct Answers -A measure of the degree of risk or harm to the
public's health.
