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Water Distribution Grade 1 Certification ADEQ
Exam 2025/2026 Questions And Answers Graded A+
What is the difference between a reduced pressure principle backflow device and a double check backflow device? The RP has a ______________.
Relief Valve
What is the maximum time period between having a backflow device tested by a certified backflow tester? ______________ year.
1
What is the regulatory definition of a cross-connection in a water supply? A physical connection between a public water system and any source of water or other substance that may lead to contamination of the water provided by the _____________ through backflow.
PWS
What is the name of a type of valve that reduces the differential pressure across a closed disk making the main valve easier to open and close?
Bypass Valve
As soon as Cl2 gas enters the throat area, a victim will sense a sudden stricture in this area-Nature's way of signaling to prevent passage of the gas to the lungs. At this point, the victim must attempt to do two things: get out of the area of the leak, proceeding upwind, and to take only very short breaths through the mouth. Normal breathing will cause __________, which must be prevented if possible.
Coughing
Chlorine gas causes suffocation, constriction of the chest, tightness in the throat, and edema of the ______________.
Lungs
_______________ available chlorine is very effective in killing bacteria.
Free
How should an operator store an empty chlorine cylinder? ____________, tagged as empty.
Upright
Name the most common CAUSE for public water supply contamination. _________________ or cross-connection
Backflow
What does a backsiphonage condition usually cause? __________ pressure or negative pressure on the service or supply side.
Reduced
What does a double check valve backflow assembly provide effective protection from? Both backpressure and backsiphonage of ____________.
Pollution
What is equipment that utilizes water for cooling, lubrication, washing or as a solvent always susceptible to?
Cross-Connection
What is the primary safety concern when using chlorine gas as opposed to calcium hypochlorite or sodium hypochlorite? The potential for a _____________ leak.
Gas
What may occur due to chronic exposure to low concentrations of chlorine gas? Chronic exposure may cause corrosion of the _____________.
Teeth
What is the process called that changes water vapor to tiny droplets or ice crystals?
Condensation
What is the unit of measurement for sound?
Decibels
What happens if grease comes in contact with the winding of a motor?
The winding insulation my deteriorate.
What is the most common type of valve used in isolating a small or medium sized section of a distribution system?
Foot Valve
What causes pump cavitation? A suction line may be ____________ or the pump is above the waterline. You have overpumped the well.
Clogged
What does continuous leakage from a mechanical seal on a pump indicate? The mechanical seal needs to be ___________________.
Replaced
What is a possible cause of a scored shaft sleeve? The _____________ has broken down
Packing
What is one disadvantage of a centrifugal pump? It is not______________.
Self-Priming
What is the best seal to use for a pump operating under high suction head conditions? A _____________ seal.
Mechanical
What is the common method used to secure an impeller to the shaft on double- suction pump? A _____________ and a tight fit.
Key
What is the main purpose of the wear rings in a centrifugal double suction pump? The wear rings maintain a flow _______________ between the impeller discharge and suction areas.
Restriction
What is the purpose of the foot valve on a pump? It keeps the pump _____________.
Primed
At which type of facility is a remote operator allowed to operate? Any Grade 1 or Grade 2 __________________.
Facility
What is the definition of an "on-site operation?" An operator who visits a facility at least _____________ to ensure that it is operating properly.
Daily
What is the definition of an "on-site representative?" On-site representative means a person located at a facility who monitors the daily operation at the facility and maintains contact with the ____________ operator regarding the facility.
Remote
What is the frequency that a remote operator must inspect a grade 1 or grade 2 water treatment plant or distributes groundwater? As often as necessary but no less then ________________.
Monthly
What is the objective of vulnerability assessment? To determine ____________ in the distribution or water system.
Weakness
How far from the edge of a hole must you place the spoil from an excavation?
2 feet
Before beginning an excavation, who should be contacted to assist in determining the location of all underground utilities in the work are? An "underground Service Alert" center, "One Call Center" or ____________________, all three of these are the same.
Bluestake
This type of chemical classification may weaken, burn, or destroy a person's skin or eyes and can be either acidic or ___________________.
Basic, Alkaline or corrosive
How should a supervisor warn an operator about the presence of a confined space? By clearly posting the appropriate ______________ at all entries to a confined space.
Signage
List the correct order for placing shoring equipment in a trench. Starting at the top move to the bottom of the trench and ______________ to remove it.
Reverse
What is the name of the valve that is specifically designed for connecting a new water main to an existing main that is under pressure?
Tapping Valve
Define the term "Water Hammer." A _________________ in a pipeline resulting from the rapid increase or decrease in water flow.
Pressure Surge
Water hammer exerts tremendous force on a system and can be highly ___________________.
Destructive
How should a water meter that is removed from service for repair be handled? ________________ the meter to retain water.
Seal
Name the three main classifications of water meters. Compound, Displacement, and __________________.
Velocity
Peak day demand is the greatest amount of water used for any one _______________ in a calendar year.
Day
What negative effect does a water meter have on a service? ____________ loss may occur.
Head
Name the 4 broad categories of water quality. Physical, ___________________, biological, radiological.
Chemical
What are disease causing organisms such as bacteria and viruses called?
Pathogens
What does a positive bacteriological sample indicate? The _______________ of bacteriological contamination
Presence
Operator has the same meaning as certified operator.
Within how many days must a certified operator notify the Department (in writing) that the operator either ceases or commences operation of another facility?
10 days
At which type of facility is a remote operator allowed to operate?
Any Grade 1 or Grade 2 facility
How close must the remote operator of a facility be to the facility to legally operate it?
Within 200 miles by ground travel
What is the inspection frequency that a remote operator must inspect a grade 1 or grade 2 water treatment plant or distribution system that produces groundwater?
As often as necessary, but no less than monthly
Upon expiration of an operator certificate, how many days does an operator have to reinstate the certificate without retaking an examination?
90 days
What is an initial monitoring year?
The calendar year designated by the Department within a compliance period in which a public water system conducts initial monitoring at a point of entry.
What is the reporting limit for all regulated VOC's?
0.0005 mg/L
Who is allowed to conduct a sanitary survey?
A representative of the Department or a professional engineer or sanitarian who is registered in Arizona and approved by the Department.
Under what circumstances may the Department reduce monitoring frequency for nitrate at a surface water sampling point and what is the reduced frequency?
If the analytical results are < 5mg/L for 4 consecutive quarters then reduce sampling frequency from quarterly to annually.
Which type of PWS is not required to sample for VOC's?
What is the definition of an "on-site operation?" An operator who visits a facility at least _____________ to ensure that it is operating properly.
Daily
According to Arizona State Rule, this term means 1 of the family of organic compounds, named as derivatives of methane, wherein 3 of 4 hydrogen atoms in methane are substituted by a halogen atom in the molecular structure.
Trihalomethanes
According to Arizona State Rule, an "air-gap separation" means a physical separation between the discharge end of a supply pipe and the top rim of its receiving vessel, which has a separation distance equal to at least?
1 inch or twice the diameter of the supply pipe, whichever is greater.
Which two agencies are responsible for approving laboratory analytical methods for drinking water analysis?
The U.S. Environmental protection Agency and the Arizona Department of Health Services.
Name a statement that is true about a double check valve backflow assembly?
A double check valve is not designed to stop backsiphonage of a health hazard
Name a statement that best describes the operation of a reduced pressure principal backflow assembly?
The relief valve will open and drain if a pressure differential occurs between the two checks.
Which disease is NOT transmitted by water?
AIDS
Which of the distribution valves is NOT classified as a rotary valve?
A gate valve is a linear type valve.
Which types of motors would be expected to have the lowest demand for a starting current?
A wound-rotor induction motor
Which treatment techniques are NOT included in ADEQ grading a water facility?
Activated Charcoal
