Water Distribution Grade 1 Certification ADEQ Practice Exam Questions With Complete Solutions
What is the general definition of an ion? An _________ with a positive or negative charge -
(ANSWER)Atom
A continuous positive pressure in a distribution system is essential for preventing what event? -
(ANSWER)Backflow Event
_____________ water pressure must be maintained to ensure adequate customer service during peak
flow periods. However, minimum positive pressure must be maintained in mains to protect against
backflow or backsiphonage from cross-connections. - (ANSWER)Minimum
Name the most common CAUSE for public water supply contamination. _________________ or cross-
connection - (ANSWER)Backflow
What does a backsiphonage condition usually cause? __________ pressure or negative pressure on the
service or supply side. - (ANSWER)Reduced
What does a double check valve backflow assembly provide effective protection from? Both
backpressure and backsiphonage of ____________. - (ANSWER)Pollution
What is equipment that utilizes water for cooling, lubrication, washing or as a solvent always susceptible
to? - (ANSWER)Cross-Connection
What is the difference between a reduced pressure principle backflow device and a double check
backflow device? The RP has a ______________. - (ANSWER)Relief Valve
What is the maximum time period between having a backflow device tested by a certified backflow
tester? ______________ year. - (ANSWER)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. - (ANSWER)PWS
, Water Distribution Grade 1 Certification ADEQ Practice Exam Questions With Complete Solutions
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? - (ANSWER)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. -
(ANSWER)Coughing
Chlorine gas causes suffocation, constriction of the chest, tightness in the throat, and edema of the
______________. - (ANSWER)Lungs
_______________ available chlorine is very effective in killing bacteria. - (ANSWER)Free
How should an operator store an empty chlorine cylinder? ____________, tagged as empty. -
(ANSWER)Upright
If a chlorine leak occurs, where will chlorine gas accumulate? Near the ____________ of the tank. -
(ANSWER)Bottom
What effect does chlorine gas have on the sense of smell? It produces olfactory _______________. -
(ANSWER)Fatigue
What is the primary safety concern when using chlorine gas as opposed to calcium hypochlorite or
sodium hypochlorite? The potential for a _____________ leak. - (ANSWER)Gas
What may occur due to chronic exposure to low concentrations of chlorine gas? Chronic exposure may
cause corrosion of the _____________. - (ANSWER)Teeth
What is the process called that changes water vapor to tiny droplets or ice crystals? -
(ANSWER)Condensation
What is the general definition of an ion? An _________ with a positive or negative charge -
(ANSWER)Atom
A continuous positive pressure in a distribution system is essential for preventing what event? -
(ANSWER)Backflow Event
_____________ water pressure must be maintained to ensure adequate customer service during peak
flow periods. However, minimum positive pressure must be maintained in mains to protect against
backflow or backsiphonage from cross-connections. - (ANSWER)Minimum
Name the most common CAUSE for public water supply contamination. _________________ or cross-
connection - (ANSWER)Backflow
What does a backsiphonage condition usually cause? __________ pressure or negative pressure on the
service or supply side. - (ANSWER)Reduced
What does a double check valve backflow assembly provide effective protection from? Both
backpressure and backsiphonage of ____________. - (ANSWER)Pollution
What is equipment that utilizes water for cooling, lubrication, washing or as a solvent always susceptible
to? - (ANSWER)Cross-Connection
What is the difference between a reduced pressure principle backflow device and a double check
backflow device? The RP has a ______________. - (ANSWER)Relief Valve
What is the maximum time period between having a backflow device tested by a certified backflow
tester? ______________ year. - (ANSWER)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. - (ANSWER)PWS
, Water Distribution Grade 1 Certification ADEQ Practice Exam Questions With Complete Solutions
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? - (ANSWER)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. -
(ANSWER)Coughing
Chlorine gas causes suffocation, constriction of the chest, tightness in the throat, and edema of the
______________. - (ANSWER)Lungs
_______________ available chlorine is very effective in killing bacteria. - (ANSWER)Free
How should an operator store an empty chlorine cylinder? ____________, tagged as empty. -
(ANSWER)Upright
If a chlorine leak occurs, where will chlorine gas accumulate? Near the ____________ of the tank. -
(ANSWER)Bottom
What effect does chlorine gas have on the sense of smell? It produces olfactory _______________. -
(ANSWER)Fatigue
What is the primary safety concern when using chlorine gas as opposed to calcium hypochlorite or
sodium hypochlorite? The potential for a _____________ leak. - (ANSWER)Gas
What may occur due to chronic exposure to low concentrations of chlorine gas? Chronic exposure may
cause corrosion of the _____________. - (ANSWER)Teeth
What is the process called that changes water vapor to tiny droplets or ice crystals? -
(ANSWER)Condensation
