CT WASTEWATER CLASS 2 EXAM REVIEW | FROM
QUESTION TO PERFECTION| STUDY WITH CONFIDENCE!
Course Code:
Course Title:
Programme:
Academic Year: 2026/2027.
Duration: 2 Hours.
Total Marks: 100.
Candidate Instructions:
1) Write your Registration Number on every answer booklet used.
2) Answer ALL questions in Section A and ANY TWO (2) questions in Section B.
3) Read each question carefully before answering.
4) Begin each question on a new page.
5) The marks for each question are indicated in brackets.
6) This paper consists of several printed pages, including this page.
7) Ensure your copy is complete before the examination begins.
8) Unauthorized materials and communication with other candidates are not permitted.
Turn Over.
APPHIA – Crafted with Care and Precision for Academic Excellence.
1
, In the activated sludge process, the oxidation may be by chemical or biological processes.
Answer: TRUE
The removal of organisms from the activated sludge treatment processes (sludge wasting) is a
very important control technique. Answer: TRUE
In an air distribution system, an air metering device should be located in a straight section of the
air main on the suction side of the blower. Answer: FALSE
In an aeration tank, the higher the food to microorganism (F/M) ratio, the more food and
therefore a lower dissolved oxygen (DO) is needed. Answer: FALSE
When considering a major process change, first review the plant data and then make only one
major change at a time. Answer: TRUE
Microbiology is another tool for operators to use in controlling the activated sludge process.
Answer: TRUE
The psychrophilic bacteria in anaerobic digesters appear to be able to survive temperatures well
below freezing with little to no harm. Answer: TRUE
Mixing is very important in a digester because it greatly speeds up the digestive rate. Answer:
TRUE
Operators should make every possible effort to pump as thick a sludge to the digester as
possible. Answer: TRUE
The withdrawal rate of sludge from a digester should be faster than a rate at which the gas
production from the system is able to maintain a positive pressure in the digester. Answer:
FALSE
Aerobic sludge digestion completes the oxidation of volatile materials in the digester. Answer:
FALSE
The proper discharge of plant effluent is the final processes for the operator. Answer: TRUE
The principles for collecting samples for measuring dissolved oxygen are the same as for
measuring temperature. Answer: TRUE
Site-specific safety procedures should be confirmed with your local safety regulatory agency.
Answer: TRUE
Always get air into the confined space before you enter to work and maintain the ventilation
until you have left the space. Answer: TRUE
The sense of smell is reliable for evaluating the presence of dangerous gases. Answer: FALSE
Moving parts that create a contact hazard to employees must be guarded. Answer: TRUE
APPHIA – Crafted with Care and Precision for Academic Excellence.
2
QUESTION TO PERFECTION| STUDY WITH CONFIDENCE!
Course Code:
Course Title:
Programme:
Academic Year: 2026/2027.
Duration: 2 Hours.
Total Marks: 100.
Candidate Instructions:
1) Write your Registration Number on every answer booklet used.
2) Answer ALL questions in Section A and ANY TWO (2) questions in Section B.
3) Read each question carefully before answering.
4) Begin each question on a new page.
5) The marks for each question are indicated in brackets.
6) This paper consists of several printed pages, including this page.
7) Ensure your copy is complete before the examination begins.
8) Unauthorized materials and communication with other candidates are not permitted.
Turn Over.
APPHIA – Crafted with Care and Precision for Academic Excellence.
1
, In the activated sludge process, the oxidation may be by chemical or biological processes.
Answer: TRUE
The removal of organisms from the activated sludge treatment processes (sludge wasting) is a
very important control technique. Answer: TRUE
In an air distribution system, an air metering device should be located in a straight section of the
air main on the suction side of the blower. Answer: FALSE
In an aeration tank, the higher the food to microorganism (F/M) ratio, the more food and
therefore a lower dissolved oxygen (DO) is needed. Answer: FALSE
When considering a major process change, first review the plant data and then make only one
major change at a time. Answer: TRUE
Microbiology is another tool for operators to use in controlling the activated sludge process.
Answer: TRUE
The psychrophilic bacteria in anaerobic digesters appear to be able to survive temperatures well
below freezing with little to no harm. Answer: TRUE
Mixing is very important in a digester because it greatly speeds up the digestive rate. Answer:
TRUE
Operators should make every possible effort to pump as thick a sludge to the digester as
possible. Answer: TRUE
The withdrawal rate of sludge from a digester should be faster than a rate at which the gas
production from the system is able to maintain a positive pressure in the digester. Answer:
FALSE
Aerobic sludge digestion completes the oxidation of volatile materials in the digester. Answer:
FALSE
The proper discharge of plant effluent is the final processes for the operator. Answer: TRUE
The principles for collecting samples for measuring dissolved oxygen are the same as for
measuring temperature. Answer: TRUE
Site-specific safety procedures should be confirmed with your local safety regulatory agency.
Answer: TRUE
Always get air into the confined space before you enter to work and maintain the ventilation
until you have left the space. Answer: TRUE
The sense of smell is reliable for evaluating the presence of dangerous gases. Answer: FALSE
Moving parts that create a contact hazard to employees must be guarded. Answer: TRUE
APPHIA – Crafted with Care and Precision for Academic Excellence.
2
