TCEQ IRRIGATION LICENSE STUDY GUIDE
Limits of Double check valve CORRECT ANS-Is a high hazard/health hazard *
Limits of AVB CORRECT ANS-Can not handle more than 12 hours of constant pressure, not
approved by the state of Texas, does not protect against back-pressure.
purpose of test cocks on DCV CORRECT ANS-to test check valves and flush
purpose of shut off-valves on PVB CORRECT ANS-To test and winterize
Required back flow prevention system for booster pump CORRECT ANS-RPZ to prevent
constant back flow
Required of air gap CORRECT ANS-2x times the diameter of the pipe
Testing requirment for BPA CORRECT ANS-Needs and frequency
low-hazard - upon installation
high Maintenance
What are the two types of back-flow? CORRECT ANS-Back pressure and Back siphonage
characteristics of looped irrigation main lines CORRECT ANS-1/2 flow gym by 1/2 pipe >
low pressure, loss downsize pipe, both at the same time.
BPA requirements for fertilizer injection system CORRECT ANS-Reduced Pressure Principle
Assembly (RPPA) (RPZ) is required when fertilizer injection are being used.
Limits of Double check valve CORRECT ANS-Is a high hazard/health hazard *
Limits of AVB CORRECT ANS-Can not handle more than 12 hours of constant pressure, not
approved by the state of Texas, does not protect against back-pressure.
purpose of test cocks on DCV CORRECT ANS-to test check valves and flush
purpose of shut off-valves on PVB CORRECT ANS-To test and winterize
Required back flow prevention system for booster pump CORRECT ANS-RPZ to prevent
constant back flow
Required of air gap CORRECT ANS-2x times the diameter of the pipe
Testing requirment for BPA CORRECT ANS-Needs and frequency
low-hazard - upon installation
high Maintenance
What are the two types of back-flow? CORRECT ANS-Back pressure and Back siphonage
characteristics of looped irrigation main lines CORRECT ANS-1/2 flow gym by 1/2 pipe >
low pressure, loss downsize pipe, both at the same time.
BPA requirements for fertilizer injection system CORRECT ANS-Reduced Pressure Principle
Assembly (RPPA) (RPZ) is required when fertilizer injection are being used.