WASTEWATER COLLECTIONS QUESTIONS
WITH CORRECT ANSWERS 2026
What D is D a D unusually D strong D wastewater D discharged D from D a D waste
D source? D - DCORRECT D ANSWER D -A D sock D load
The D four D categories D of D wastewater D characteristics D are? D - D CORRECT
D ANSWER D - Dphysical, D chemical, D bacteriological,
and D radiological.
The D amount D of D wastewater D collected D depends D on? D - D CORRECT
D ANSWER D - Deconomic D status, D water D rates, D climate,
infiltration/inflow, D and D industry.
Physical D characteristics D are D detected D by D the D senses D such D as? D - D CORRECT
D ANSWER D - Dsmell D and D sight
When D anaerobic D decomposition D begins D producing D acid D and
odorous D gases.? D - D CORRECT D ANSWER D -Begins D when D dissolved D oxygen D is D gone
,One D mg/L D or D one D ppm D is? D - D CORRECT
D ANSWER D - Done D pound D of D material D in D a
D million D pounds D of D water.
Organics D are D produced D by D - D CORRECT D ANSWER D -plants, D animals, D or D humans
It D is D not D organic D and D examples D are D sand, D metal, D and D rock. D - D CORRECT
D ANSWER D -"Inorganic"
What D is D toxic, D corrosive, D flammable, D heavier D than D air, D deadens D the D sense D of
, smell, D and D has D a D rotten D egg D odor. D - D CORRECT D ANSWER D -Hydrogen D sulfide
What D is D lighter D than D air, D explosive, D colorless, D and D odorless? D -
D CORRECT D ANSWER D - DMethane D (natural) D gas
What D Oil D and D grease D in D wastewater D may D cause? D - D CORRECT
D ANSWER D - Dexplosion, D fires,stoppages D and D odor
Excessive D chlorides D interfere D with D treatment D and D effect
D wastewater
D- DCORRECT D ANSWER D -lab D tests
The D BOD D test D indicates D the D amount D of D organic D matter D that D can D be D oxidized
D by D biological D and Dchemical D action D in D how D many D days D at D what D temperature
D ? D - D CORRECT D ANSWER D -
5 D days D at D 20°C
Bacteria D requiring D free, D uncombined D oxygen D are . D - D CORRECT D ANSWER D -
aerobic
Bacteria D requiring D combined D oxygen D are . D - D CORRECT D ANSWER D -anaerobic
WITH CORRECT ANSWERS 2026
What D is D a D unusually D strong D wastewater D discharged D from D a D waste
D source? D - DCORRECT D ANSWER D -A D sock D load
The D four D categories D of D wastewater D characteristics D are? D - D CORRECT
D ANSWER D - Dphysical, D chemical, D bacteriological,
and D radiological.
The D amount D of D wastewater D collected D depends D on? D - D CORRECT
D ANSWER D - Deconomic D status, D water D rates, D climate,
infiltration/inflow, D and D industry.
Physical D characteristics D are D detected D by D the D senses D such D as? D - D CORRECT
D ANSWER D - Dsmell D and D sight
When D anaerobic D decomposition D begins D producing D acid D and
odorous D gases.? D - D CORRECT D ANSWER D -Begins D when D dissolved D oxygen D is D gone
,One D mg/L D or D one D ppm D is? D - D CORRECT
D ANSWER D - Done D pound D of D material D in D a
D million D pounds D of D water.
Organics D are D produced D by D - D CORRECT D ANSWER D -plants, D animals, D or D humans
It D is D not D organic D and D examples D are D sand, D metal, D and D rock. D - D CORRECT
D ANSWER D -"Inorganic"
What D is D toxic, D corrosive, D flammable, D heavier D than D air, D deadens D the D sense D of
, smell, D and D has D a D rotten D egg D odor. D - D CORRECT D ANSWER D -Hydrogen D sulfide
What D is D lighter D than D air, D explosive, D colorless, D and D odorless? D -
D CORRECT D ANSWER D - DMethane D (natural) D gas
What D Oil D and D grease D in D wastewater D may D cause? D - D CORRECT
D ANSWER D - Dexplosion, D fires,stoppages D and D odor
Excessive D chlorides D interfere D with D treatment D and D effect
D wastewater
D- DCORRECT D ANSWER D -lab D tests
The D BOD D test D indicates D the D amount D of D organic D matter D that D can D be D oxidized
D by D biological D and Dchemical D action D in D how D many D days D at D what D temperature
D ? D - D CORRECT D ANSWER D -
5 D days D at D 20°C
Bacteria D requiring D free, D uncombined D oxygen D are . D - D CORRECT D ANSWER D -
aerobic
Bacteria D requiring D combined D oxygen D are . D - D CORRECT D ANSWER D -anaerobic
