Water Distribution Grade 1 Certification ADEQ Practice Exam
What is the general definition of an ion? An _________ with a positive or negative charge -
correct answer Atom
A continuous positive pressure in a distribution system is essential for preventing what event? -
correct 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. - correct answer Minimum
Name the most common CAUSE for public water supply contamination. _________________ or
cross-connection - correct answer Backflow
What does a backsiphonage condition usually cause? __________ pressure or negative
pressure on the service or supply side. - correct answer Reduced
What does a double check valve backflow assembly provide effective protection from? Both
backpressure and backsiphonage of ____________. - correct answer Pollution
What is equipment that utilizes water for cooling, lubrication, washing or as a solvent always
susceptible to? - correct answer Cross-Connection
What is the difference between a reduced pressure principle backflow device and a double
check backflow device? The RP has a ______________. - correct answer Relief Valve
What is the maximum time period between having a backflow device tested by a certified
backflow tester? ______________ year. - correct 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. - correct
answer 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? - correct 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. - correct answer Coughing
Chlorine gas causes suffocation, constriction of the chest, tightness in the throat, and edema of
the ______________. - correct answer Lungs
, _______________ available chlorine is very effective in killing bacteria. - correct answer Free
How should an operator store an empty chlorine cylinder? ____________, tagged as empty. -
correct answer Upright
If a chlorine leak occurs, where will chlorine gas accumulate? Near the ____________ of the
tank. - correct answer Bottom
What effect does chlorine gas have on the sense of smell? It produces olfactory
_______________. - correct 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. - correct answer Gas
What may occur due to chronic exposure to low concentrations of chlorine gas? Chronic
exposure may cause corrosion of the _____________. - correct answer Teeth
What is the process called that changes water vapor to tiny droplets or ice crystals? - correct
answer Condensation
What is the unit of measurement for sound? - correct answer Decibels
What happens if grease comes in contact with the winding of a motor? - correct answer 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? - correct answer Gate
What is a possible result of over greasing a bearing? There is extreme _____________ in the
bearing chamber causing heat and scoring of the shaft. - correct answer Friction
What is meant by the term "peak demand?" The _____________ momentary load placed on a
water treatment plant, pumping station or distribution system. - correct answer Maximum
What is the range of the pH scale? between _____________-14. - correct answer Zero
What does a Bellows-type sensor reacts to a change in? _________________. - correct answer
Pressure
Centrifugal pumps do not generate suction unless the impeller is submerged in water. If a pump
is located above the level of water what must be provided on the suction piping to hold the
prime? - correct answer Foot Valve
What causes pump cavitation? A suction line may be ____________ or the pump is above the
waterline. You have overpumped the well. - correct answer Clogged
What does continuous leakage from a mechanical seal on a pump indicate? The mechanical seal
needs to be ___________________. - correct answer Replaced
What is the general definition of an ion? An _________ with a positive or negative charge -
correct answer Atom
A continuous positive pressure in a distribution system is essential for preventing what event? -
correct 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. - correct answer Minimum
Name the most common CAUSE for public water supply contamination. _________________ or
cross-connection - correct answer Backflow
What does a backsiphonage condition usually cause? __________ pressure or negative
pressure on the service or supply side. - correct answer Reduced
What does a double check valve backflow assembly provide effective protection from? Both
backpressure and backsiphonage of ____________. - correct answer Pollution
What is equipment that utilizes water for cooling, lubrication, washing or as a solvent always
susceptible to? - correct answer Cross-Connection
What is the difference between a reduced pressure principle backflow device and a double
check backflow device? The RP has a ______________. - correct answer Relief Valve
What is the maximum time period between having a backflow device tested by a certified
backflow tester? ______________ year. - correct 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. - correct
answer 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? - correct 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. - correct answer Coughing
Chlorine gas causes suffocation, constriction of the chest, tightness in the throat, and edema of
the ______________. - correct answer Lungs
, _______________ available chlorine is very effective in killing bacteria. - correct answer Free
How should an operator store an empty chlorine cylinder? ____________, tagged as empty. -
correct answer Upright
If a chlorine leak occurs, where will chlorine gas accumulate? Near the ____________ of the
tank. - correct answer Bottom
What effect does chlorine gas have on the sense of smell? It produces olfactory
_______________. - correct 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. - correct answer Gas
What may occur due to chronic exposure to low concentrations of chlorine gas? Chronic
exposure may cause corrosion of the _____________. - correct answer Teeth
What is the process called that changes water vapor to tiny droplets or ice crystals? - correct
answer Condensation
What is the unit of measurement for sound? - correct answer Decibels
What happens if grease comes in contact with the winding of a motor? - correct answer 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? - correct answer Gate
What is a possible result of over greasing a bearing? There is extreme _____________ in the
bearing chamber causing heat and scoring of the shaft. - correct answer Friction
What is meant by the term "peak demand?" The _____________ momentary load placed on a
water treatment plant, pumping station or distribution system. - correct answer Maximum
What is the range of the pH scale? between _____________-14. - correct answer Zero
What does a Bellows-type sensor reacts to a change in? _________________. - correct answer
Pressure
Centrifugal pumps do not generate suction unless the impeller is submerged in water. If a pump
is located above the level of water what must be provided on the suction piping to hold the
prime? - correct answer Foot Valve
What causes pump cavitation? A suction line may be ____________ or the pump is above the
waterline. You have overpumped the well. - correct answer Clogged
What does continuous leakage from a mechanical seal on a pump indicate? The mechanical seal
needs to be ___________________. - correct answer Replaced
