Class 4 Wastewater IL Questions With Complete Solutions
3 possible reasons a pump won't pump Correct Answers 1. air
leaks in the suction line 2. loose connections 3. discharge heated
too high
5 milligrams per liter equals? Correct Answers 5 parts per
million
A D.O. meter needle fluctuates when? Correct Answers The
membrane in the probe needs attention
A parshall fume is sometimes used for? Correct Answers flow
measurment
A pH of 0 to 7 is? Correct Answers acidic
A rubber bulb should always be used to? Correct Answers
Pipette wastewater or chemicals
A sample with a pH of 8.5 is considered? Correct Answers
Alkaline
Aerobic lagoons are how deep? Correct Answers 3-4 feet
An accident report should contain what data? (3) Correct
Answers 1. description of the accident 2. number of people
involved 3. what defective equipment or unsafe conditions
contributed to the accident
, An automatic vent fan that runs during the time the door is open
is considered? Correct Answers ventilation in a lift station
An electric motor is wound for a grounded 3 phase circuit, if the
motor is fully loaded and more phase cuts out while in operation
what will happen? Correct Answers It will heat up and be
damaged unless stopped by a thermal control device
An imhoff cone is used to? Correct Answers Determine the
amount of settleable solids
An operators license is subject to? Correct Answers Revocation,
fine and imprisonment
Biological activity in a lagoon can be provided by? (3) Correct
Answers Aerobic bacteria, anaerobic bacteria and algae
Biological activity in long, sluggish-flow, flat grade sewer lines
will probably cause? Correct Answers 1. concrete or metal
corrosion 2. oxygen deficiency in the air in manholes 3. toxic
gas production
Corrosion in manholes is caused by? Correct Answers hygrogen
sulfide gas
Cyclone is not what? Correct Answers a type of pump
Daily use of chlorine can be defined as? Correct Answers
Chlorine demand
3 possible reasons a pump won't pump Correct Answers 1. air
leaks in the suction line 2. loose connections 3. discharge heated
too high
5 milligrams per liter equals? Correct Answers 5 parts per
million
A D.O. meter needle fluctuates when? Correct Answers The
membrane in the probe needs attention
A parshall fume is sometimes used for? Correct Answers flow
measurment
A pH of 0 to 7 is? Correct Answers acidic
A rubber bulb should always be used to? Correct Answers
Pipette wastewater or chemicals
A sample with a pH of 8.5 is considered? Correct Answers
Alkaline
Aerobic lagoons are how deep? Correct Answers 3-4 feet
An accident report should contain what data? (3) Correct
Answers 1. description of the accident 2. number of people
involved 3. what defective equipment or unsafe conditions
contributed to the accident
, An automatic vent fan that runs during the time the door is open
is considered? Correct Answers ventilation in a lift station
An electric motor is wound for a grounded 3 phase circuit, if the
motor is fully loaded and more phase cuts out while in operation
what will happen? Correct Answers It will heat up and be
damaged unless stopped by a thermal control device
An imhoff cone is used to? Correct Answers Determine the
amount of settleable solids
An operators license is subject to? Correct Answers Revocation,
fine and imprisonment
Biological activity in a lagoon can be provided by? (3) Correct
Answers Aerobic bacteria, anaerobic bacteria and algae
Biological activity in long, sluggish-flow, flat grade sewer lines
will probably cause? Correct Answers 1. concrete or metal
corrosion 2. oxygen deficiency in the air in manholes 3. toxic
gas production
Corrosion in manholes is caused by? Correct Answers hygrogen
sulfide gas
Cyclone is not what? Correct Answers a type of pump
Daily use of chlorine can be defined as? Correct Answers
Chlorine demand
