Texas Irrigator Practice Test Section 1 Review, Exams of Water Resources Planning and Management

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Texas Irrigator

Practice Test Section 1 Review

Questions and Answers 100%Pass

David Mungai [Date] [Course title]

Texas Irrigator Practice Test Section 1

Review Questions and Answers

100%Pass

Which devices can stop backsiphonage? a). PVB, DCA, RP, and AVB b). DCA and RP c). RP, DCA, and PVB d). AVB and PVB e). PVB and DCA - Answer>> a). PVB, DCA, RP, and AVB Which devices can stop backpressure? a). PVB, DCA, RP, and AVB b). RP, DCA, and PVB c). AVB and PVB d). PVB and DCA e). DCA and RP - Answer>> e). DCA and RP Which devices can handle constant pressure? a). PVB, DCA, RP, and AVB b). DCA and RP c). RP, DCA, and PVB d). AVB and PVB e). PVB and DCA - Answer>> c). RP, DCA, and PVB The approved backflow devices for non-health hazards include: a). AVB & RP b). RP, DCA, and PVB c). AVB and PVB d). PVB and DCA e). All devices (AVB, PVB, DCA, and RP) - Answer>> e). All devices (AVB, PVB, DCA, and RP)

c). DCA d). RP e). Devices used in applications designated as non-health hazards - Answer>> b). Devices used in applications designated as health hazards Which backflow devices have to be tested upon installation? a). AVB and RP b). Devices used in applications designated as health hazards c). DCA d). RP e). All backflow devices - Answer>> e). All backflow devices If a DCA is installed below ground, what device is required? a). A filter b). A flush valve c). A pressure regulator on the downstream side of the DCA d). A Y-Strainer installed on the inlet side of the DCA e). Installing at least 12" deep - Answer>> d). A Y-Strainer installed on inlet side of the DCA If there is an additional water source supplying water to a system being supplied by a potable water supply, what device has to be used on with the potable water supply? a). AVB b). PVB c). DCA d). RP e). C or D - Answer>> d). RP What device cannot be used when there is a health hazard? a). AVB b). PVB c). DCA d). RP

e). A and B - Answer>> c). DCA An AVB and PVB can be used in health hazard situations, if the following conditions are not present: a). Backpressure b). There is pump downstream c). Chemicals added d). A pressure regulator e). A, B, and C - Answer>> e). A, B, and C An Atmospheric Vacuum Breaker: a). Will stop backpressure b). Has to be installed 6" higher than the highest head or outlet in the retracted position, will not handle constant pressure, and will stop backsiphonage c). Has to be installed 12" higher than the highest head or outlet in the retracted position, will handle constant pressure, and will stop backsiphonage d). Has to be installed 6" higher than the highest head or outlet in the retracted position, will not handle constant pressure, and will stop backpressure e). A and B - Answer>> b). Has to be installed 6" higher than the highest head or outlet in the retracted position, will not handle constant pressure, and will stop backsiphonage What is the unwanted reversal of water flow in an irrigation system? a). Backpressure b). Contamination c). Pollution d). Backflow - Answer>> d). Backflow A cross connection is any actual or potential connection between a potable water supply and: a). A well

How many total ways are there to protect against backpressure and/or backsiphonage? a). 3 b). 6 c). 2 d). 5 - Answer>> d). 5 What is the unobstructed vertical distance through free atmosphere between the lowest point of a water supply outlet and the flood level rim of the fixture or assembly into which the outlet discharges? a). Atmospheric vacuum breaker b). Pressure vacuum breaker c). A water gap d). Reduced pressure principle device e). An air gap - Answer>> e). An air gap The vertical, physical separations, of an air gap, must be: a). at least twice the diameter of the water supply outlet, but never less than 3 inch. b). at least three times the diameter of the water supply outlet, but never less than 1 inch. c). at least twice the diameter of the water supply outlet, but never less than ½". d). at least twice the diameter of the water supply outlet, but never less than 1 inch. - Answer>> d). at least twice the diameter of the water supply outlet, but never less than 1 inch. What is a typical example of an air gap? a). Pressure regulator b). DCA c). Kitchen sink d). None of the above - Answer>> c). Kitchen sink

What is the maximum number of hours an AVB can have constant pressure? a). 2 b). 6 c). 12 d). 8 - Answer>> c). 12 How high does a pressure vacuum breaker have to be installed? a). 6" above the highest head or outlet b). 12" above the highest head or outlet c). 12" above the grade d). 12" above the highest head or outlet in the retracted position - Answer>> d). 12" above the highest head or outlet in the retracted position How many test cocks does a PVB, DCA, and RP have, respectively? a). 4, 4, and 2 b). 1, 2, and 4 c). 2, 4, and 4 d). 4, 4, and 4 - Answer>> c). 2, 4, and 4 If the highest head at the site is a shrub spray on a 12" riser, how high would a PVB have to be installed if right next to that head? a). 6" b). 18" c). 12" d). 24" - Answer>> d). 24" Which backflow devices incorporate two check valves? a). DC b). RP c). AVB d). PVB e). A and B - Answer>> e). A and B

AVB - Answer>> Atmospheric Vacuum Breaker PVB - Answer>> Pressure Vacuum Breaker DCA - Answer>> Double Check Assembly RP - Answer>> Reduced Pressure Principle Device AVB ❏ Backsiphonage ❏ Backpressure ❏ Constant pressure ❏ Low Hazard ❏ High Hazard - Answer>> ❏ Backsiphonage ❏ Low Hazard ❏ High Hazard *

• only if there is no threat of back pressure or fertilizer injector PVB ❏ Backsiphonage ❏ Backpressure ❏ Constant pressure ❏ Low Hazard ❏ High Hazard - Answer>> ❏ Backsiphonage ❏ Constant pressure ❏ Low Hazard ❏ High Hazard *
• only if there is no threat of back pressure or fertilizer injector DCA ❏ Backsiphonage ❏ Backpressure ❏ Constant pressure ❏ Low Hazard

❏ High Hazard - Answer>> ❏ Backsiphonage ❏ Backpressure ❏ Constant pressure ❏ Low Hazard RP ❏ Backsiphonage ❏ Backpressure ❏ Constant pressure ❏ Low Hazard ❏ High Hazard - Answer>> ❏ Backsiphonage ❏ Backpressure ❏ Constant pressure ❏ Low Hazard ❏ High Hazard AVB Installation - Answer>> Vertically, 6" above highest outlet PVB Installation - Answer>> Vertically, 12" above highest outlet, 2 test cocks, 2 flow controls DCA Installation - Answer>> Vertically or horizontally, can be below grade, 4 test cocks, 2 flow controls RP Installation - Answer>> Horizontally, 12" above grade, 4 test cocks, 2 flow controls, required when using a fertilizer injector