Class 4 Wastewater IL Exam with Questions and Answers – 100% Solved
3 possible reasons a pump won't pump - ✔✔✔-1. air leaks in the suction line 2. loose
connections 3. discharge heated too high
5 milligrams per liter equals? - ✔✔✔-5 parts per million
A D.O. meter needle fluctuates when? - ✔✔✔-The membrane in the probe needs attention
A parshall fume is sometimes used for? - ✔✔✔-flow measurment
A pH of 0 to 7 is? - ✔✔✔-acidic
A rubber bulb should always be used to? - ✔✔✔-Pipette wastewater or chemicals
A sample with a pH of 8.5 is considered? - ✔✔✔-Alkaline
Aerobic lagoons are how deep? - ✔✔✔-3-4 feet
An accident report should contain what data? (3) - ✔✔✔-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? - ✔✔✔-
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? - ✔✔✔-It will heat up and be damaged
unless stopped by a thermal control device
, Class 4 Wastewater IL Exam with Questions and Answers – 100% Solved
An imhoff cone is used to? - ✔✔✔-Determine the amount of settleable solids
An operators license is subject to? - ✔✔✔-Revocation, fine and imprisonment
Biological activity in a lagoon can be provided by? (3) - ✔✔✔-Aerobic bacteria, anaerobic
bacteria and algae
Biological activity in long, sluggish-flow, flat grade sewer lines will probably cause? - ✔✔✔-1.
concrete or metal corrosion 2. oxygen deficiency in the air in manholes 3. toxic gas production
Corrosion in manholes is caused by? - ✔✔✔-hygrogen sulfide gas
Cyclone is not what? - ✔✔✔-a type of pump
Daily use of chlorine can be defined as? - ✔✔✔-Chlorine demand
Disease-causing bacteria are referred to as? - ✔✔✔-Pathogenic
Disinfection is the process by which? - ✔✔✔-all pathogenic bacteria aare destroyed or removed
Disinfection is used to control diseases of? (3) - ✔✔✔-Cholera, typhoid, and polio
Facultative bacteria can utilize? - ✔✔✔-free disolved oxygen or combined oxygen
Facultative lagoons have what 2 types of processes? - ✔✔✔-Anaerobic and aerobic
3 possible reasons a pump won't pump - ✔✔✔-1. air leaks in the suction line 2. loose
connections 3. discharge heated too high
5 milligrams per liter equals? - ✔✔✔-5 parts per million
A D.O. meter needle fluctuates when? - ✔✔✔-The membrane in the probe needs attention
A parshall fume is sometimes used for? - ✔✔✔-flow measurment
A pH of 0 to 7 is? - ✔✔✔-acidic
A rubber bulb should always be used to? - ✔✔✔-Pipette wastewater or chemicals
A sample with a pH of 8.5 is considered? - ✔✔✔-Alkaline
Aerobic lagoons are how deep? - ✔✔✔-3-4 feet
An accident report should contain what data? (3) - ✔✔✔-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? - ✔✔✔-
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? - ✔✔✔-It will heat up and be damaged
unless stopped by a thermal control device
, Class 4 Wastewater IL Exam with Questions and Answers – 100% Solved
An imhoff cone is used to? - ✔✔✔-Determine the amount of settleable solids
An operators license is subject to? - ✔✔✔-Revocation, fine and imprisonment
Biological activity in a lagoon can be provided by? (3) - ✔✔✔-Aerobic bacteria, anaerobic
bacteria and algae
Biological activity in long, sluggish-flow, flat grade sewer lines will probably cause? - ✔✔✔-1.
concrete or metal corrosion 2. oxygen deficiency in the air in manholes 3. toxic gas production
Corrosion in manholes is caused by? - ✔✔✔-hygrogen sulfide gas
Cyclone is not what? - ✔✔✔-a type of pump
Daily use of chlorine can be defined as? - ✔✔✔-Chlorine demand
Disease-causing bacteria are referred to as? - ✔✔✔-Pathogenic
Disinfection is the process by which? - ✔✔✔-all pathogenic bacteria aare destroyed or removed
Disinfection is used to control diseases of? (3) - ✔✔✔-Cholera, typhoid, and polio
Facultative bacteria can utilize? - ✔✔✔-free disolved oxygen or combined oxygen
Facultative lagoons have what 2 types of processes? - ✔✔✔-Anaerobic and aerobic
