WASTEWATER COLLECTIONS III FINAL PAPER
2026 QUESTIONS WITH ANSWERS GRADED
A+
◉ What is the most important problem with the pump shaft?
Answer: 1. Bearing fits.
2. Impeller.
3. Packing.
4. Shaft.
◉ What is the purpose of a mechanical seal? Answer: 1. Allow use of
water for lubricating.
2. Eliminate the need for packing.
3. Prevent leakage between the pump casing and shaft.
4. Provide an isolation Seal instead of using valves.
◉ Why must a coupling that rotates at high speeds be aligned with
great care? Answer: 1. To avoid cavitation ion.
2. To minimize safety hazards.
3. To prevent bearing failure.
4. To provide maximum trouble-free service.
,◉ What is the purpose of universal joints? Answer: 1. To be used
instead of sheaves.
2. To effectively pump water.
3. To join bearings in stuffing boxes.
4. To take up any misalignment between pump and drive.
◉ What is the purpose of lubrication? Answer: 1. To keep bearings
rolling.
2. To minimize friction head losses in pipes.
3. To prevent shaft misalignment.
4. To reduce friction between two surfaces.
◉ What is the first step in defining a collection system rehabilitation
program? Answer: 1. Contact local media and request public
support.
2. Convince upper management that rehabilitation program is
necessary.
3. Develop a comprehensive written description of collection system.
4. Obtain funding for the rehabilitation program.
◉ What is the major stumbling block to the Implementation of a
rehabilitation program? Answer: 1. Determining public response
and support.
2. Identifying staff and securing funding.
, 3. Locating and selecting site.
4. Obtaining environmental regulatory approval.
◉ What is the main purpose of infiltration/inflow (I/I) evaluations?
Answer: 1. To control flooding on roads and streets.
2. To protect public water supplies.
3. To recharge the ground water table.
4. To reduce the hydraulic load on sewer system.
◉ Why can exfiltration be a serious problem in some areas? Answer:
1. Filtration remove a higher degree of pollutants than necessary.
2. Loss of valuable water rights.
3. Possible contamination of groundwater used for a public drinking
water supply.
4. Reduction of load on wastewater treatment plant.
◉ Why is surcharging a problem at flow metering site? Answer: 1.
Causes backflow conditions, which will produce faulty flowmetering
reareadings.
2. Eliminates scoring velocity, which flushes metering site.
3. Prevents metering devices from storing measurements.
4. Produces excess electrical charges in metering devices.
2026 QUESTIONS WITH ANSWERS GRADED
A+
◉ What is the most important problem with the pump shaft?
Answer: 1. Bearing fits.
2. Impeller.
3. Packing.
4. Shaft.
◉ What is the purpose of a mechanical seal? Answer: 1. Allow use of
water for lubricating.
2. Eliminate the need for packing.
3. Prevent leakage between the pump casing and shaft.
4. Provide an isolation Seal instead of using valves.
◉ Why must a coupling that rotates at high speeds be aligned with
great care? Answer: 1. To avoid cavitation ion.
2. To minimize safety hazards.
3. To prevent bearing failure.
4. To provide maximum trouble-free service.
,◉ What is the purpose of universal joints? Answer: 1. To be used
instead of sheaves.
2. To effectively pump water.
3. To join bearings in stuffing boxes.
4. To take up any misalignment between pump and drive.
◉ What is the purpose of lubrication? Answer: 1. To keep bearings
rolling.
2. To minimize friction head losses in pipes.
3. To prevent shaft misalignment.
4. To reduce friction between two surfaces.
◉ What is the first step in defining a collection system rehabilitation
program? Answer: 1. Contact local media and request public
support.
2. Convince upper management that rehabilitation program is
necessary.
3. Develop a comprehensive written description of collection system.
4. Obtain funding for the rehabilitation program.
◉ What is the major stumbling block to the Implementation of a
rehabilitation program? Answer: 1. Determining public response
and support.
2. Identifying staff and securing funding.
, 3. Locating and selecting site.
4. Obtaining environmental regulatory approval.
◉ What is the main purpose of infiltration/inflow (I/I) evaluations?
Answer: 1. To control flooding on roads and streets.
2. To protect public water supplies.
3. To recharge the ground water table.
4. To reduce the hydraulic load on sewer system.
◉ Why can exfiltration be a serious problem in some areas? Answer:
1. Filtration remove a higher degree of pollutants than necessary.
2. Loss of valuable water rights.
3. Possible contamination of groundwater used for a public drinking
water supply.
4. Reduction of load on wastewater treatment plant.
◉ Why is surcharging a problem at flow metering site? Answer: 1.
Causes backflow conditions, which will produce faulty flowmetering
reareadings.
2. Eliminates scoring velocity, which flushes metering site.
3. Prevents metering devices from storing measurements.
4. Produces excess electrical charges in metering devices.
