Wastewater Grade 2 Exam Questions with Verified Answers| Latest Update Graded A+
Coagulant Using coagulants helps to thicken the sludge into a form which allows the solids
and other particles which are contaminating the water to be easily removed.
Nitrification The removal of nitrogen by biological nitrification and denitrification
What chemical is Chlorine Sodium hypochlorite
what chemical is used for dechlorification? Sodium biosulfite
What do red electrical wires mean hot/positive
What do black electrical wires mean negative
What do white or gray electrical wires mean neutral
What do Green electrical wires mean Ground wires
What hazards are associated with polymer spills fires, explosions, slippery surfaces and
toxicity
How frequent are daily record tests sent to maintain and monitor equipment (not every day)
annually
How frequent are alarms tested to maintain and monitor the equipment. twice a year
How often are Electric generators and pumps tested to maintain and monitor equipment
twice a year
, How often are SCBAs and other breathing apparatus' tested to maintain and monitor the
equipment once every 5 years.
How often do you keep test records 5 years
Aeration tank raw or settled wastewater is mixed with return sludge and aerated. The same
as aeration bay, aerator, or reactor.
Bugs Bacteria
Which is heavier? Chlorine or Air? Chlorine is 2.5 times heavier
NPDES National Pollutant Discharge Elimination System
Oxygen reading minimum before entering a manhole 19.5%
Fire extinguisher A Ash
fire extinguisher B Boil
Fire extinguisher C Current
Fire extinguisher D Multi-class
Lock out tag out locking off of a machinery switch, then placing a tag on the switch stating
why it is shut off; method of preventing equipment from being accidentally restarted.
Coagulant Using coagulants helps to thicken the sludge into a form which allows the solids
and other particles which are contaminating the water to be easily removed.
Nitrification The removal of nitrogen by biological nitrification and denitrification
What chemical is Chlorine Sodium hypochlorite
what chemical is used for dechlorification? Sodium biosulfite
What do red electrical wires mean hot/positive
What do black electrical wires mean negative
What do white or gray electrical wires mean neutral
What do Green electrical wires mean Ground wires
What hazards are associated with polymer spills fires, explosions, slippery surfaces and
toxicity
How frequent are daily record tests sent to maintain and monitor equipment (not every day)
annually
How frequent are alarms tested to maintain and monitor the equipment. twice a year
How often are Electric generators and pumps tested to maintain and monitor equipment
twice a year
, How often are SCBAs and other breathing apparatus' tested to maintain and monitor the
equipment once every 5 years.
How often do you keep test records 5 years
Aeration tank raw or settled wastewater is mixed with return sludge and aerated. The same
as aeration bay, aerator, or reactor.
Bugs Bacteria
Which is heavier? Chlorine or Air? Chlorine is 2.5 times heavier
NPDES National Pollutant Discharge Elimination System
Oxygen reading minimum before entering a manhole 19.5%
Fire extinguisher A Ash
fire extinguisher B Boil
Fire extinguisher C Current
Fire extinguisher D Multi-class
Lock out tag out locking off of a machinery switch, then placing a tag on the switch stating
why it is shut off; method of preventing equipment from being accidentally restarted.
