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TCEQ IRRIGATION LICENSE STUDY GUIDE QUESTIONS WITH ANSWERS
Typology: Exams
1 / 4
BPA requirements for fertilizer injection system - .... ๐ฐ VERIFIED ANSWERS.... โโ Reduced Pressure Principle Assembly (RPPA) (RPZ) is required when fertilizer injection are being used. Causes backsiphonage? - .... ๐ฐ VERIFIED ANSWERS.... โโ 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 - .... ๐ฐ VERIFIED ANSWERS.... โโ Debris-can enter the valve. (Can use Y strainer to provide a solution.) Definition of high-hazard system? - .... ๐ฐ VERIFIED ANSWERS.... โโ Non-potable water, chemicals, fertilizers Definition of cross-connection? - .... ๐ฐ VERIFIED ANSWERS.... โโ Any actual or potential connection between a potable water supply and any source of contamination or pollution. Degree of hazard - .... ๐ฐ VERIFIED ANSWERS.... โโ A measure of the degree of risk or harm to the public's health.
General installation requirements of BPA - .... ๐ฐ VERIFIED ANSWERS.... โโ Device must check/pass Back-siphonage, Back- pressure, constant pressure, non-health hazard, health hazard. Installation requirements of AVB - .... ๐ฐ VERIFIED ANSWERS.... โโ -Installed 6" above the highest head or outlet in the system. -No Valves -Downstream. -Installed vertically. Installation and inspection requirements for public water system to BPA - .... ๐ฐ VERIFIED ANSWERS.... โโ installation requirements of PVB - .... ๐ฐ VERIFIED ANSWERS.... โโ 12" above the highest sprinkler head Vertically installed Installation requirments of RPZ - .... ๐ฐ VERIFIED ANSWERS.... โโ 12" above ground Installation requirements of DCV - .... ๐ฐ VERIFIED ANSWERS.... โโ Horizontal or Vertical above or below ground. Limits of Double check valve - .... ๐ฐ VERIFIED ANSWERS.... โโ Is a high hazard/health hazard *
Limits of AVB - .... ๐ฐ VERIFIED ANSWERS.... โโ 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 - .... ๐ฐ VERIFIED ANSWERS.... โโ to test check valves and flush purpose of shut off-valves on PVB - .... ๐ฐ VERIFIED ANSWERS.... โโ To test and winterize Required back flow prevention system for booster pump - .... ๐ฐ VERIFIED ANSWERS.... โโ RPZ to prevent constant back flow Required of air gap - .... ๐ฐ VERIFIED ANSWERS.... โโ 2x times the diameter of the pipe Testing requirment for BPA - .... ๐ฐ VERIFIED ANSWERS.... โโ Needs and frequency low-hazard - upon installation high Maintenance What are the two types of back-flow? - .... ๐ฐ VERIFIED ANSWERS.... โโ Back pressure and Back siphonage characteristics of looped irrigation main lines - .... ๐ฐ VERIFIED ANSWERS.... โโ 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 - .... ๐ฐ VERIFIED ANSWERS.... โโ as flow increases pressure decreases velocity increases Characteristics of water - .... ๐ฐ VERIFIED ANSWERS.... โโ non compress-able, potable, non potable Common units of measure for flow rate in landscape irrigation