WASTE WATER GRADE 1 |3 DIFFERENT
VERSIONS CERTIFICATION SCRIPT 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◍ Ventilating a valve vault.
Answer: Essential before entry to remove dangerous gases
◍ Hydrates.
Answer: Include alum, blue stone, and ferrous sulfate
◍ Vacuum filter method.
Answer: Uses partially submerged rotating drum
◍ Electric potential.
Answer: Measured in volts
◍ Notifying state regulatory body.
Answer: All unusual or extraordinary discharges within 24 hours
◍ Hydroxide.
Answer: Gives water its greatest capacity to neutralize acids
◍ Minimum number of people on-site at a confined space site.
Answer: Three, with one entering a manhole
◍ Chemical Oxygen Demand (COD) test.
Answer: Used to make process changes immediately if a problem develops
◍ Mosquitoes.
Answer: Nuisance organisms controlled by disturbed water surface
◍ Water.
Answer: Used as a standard because of its unique properties and availability
in pure state
, ◍ Sodium nitrate.
Answer: Not a hydrate
◍ Ideal wastewater velocity through a screen channel.
Answer: 1.5 ft/s (feet per second)
◍ Bacteria.
Answer: Main 'workers' in the activated sludge process
◍ Notifying state regulatory body.
Answer: Noncompliance that could affect state's waters or endanger public
health within 24 hours
◍ Tests to be performed within 15 minutes after collection.
Answer: pH, temperature, and dissolved oxygen
◍ Placing vehicle when working in a manhole.
Answer: Between the manhole and oncoming traffic
◍ Carbon monoxide.
Answer: Slightly lighter than air
◍ Ideal wastewater velocity for grit removal in a grit chamber.
Answer: 0.7 to 1.4 ft/s
◍ Ladders in a trench.
Answer: Required every 25 feet
◍ Percentage of dissolved solids.
Answer: 70% of total solids
◍ A-B-C fire extinguishers.
Answer: Should be in pump stations
◍ Preserving a dissolved oxygen sample.
Answer: With sulfuric acid for 8 hours for analysis using the modified
Winkler method
◍ Solids content in wastewater.
VERSIONS CERTIFICATION SCRIPT 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◍ Ventilating a valve vault.
Answer: Essential before entry to remove dangerous gases
◍ Hydrates.
Answer: Include alum, blue stone, and ferrous sulfate
◍ Vacuum filter method.
Answer: Uses partially submerged rotating drum
◍ Electric potential.
Answer: Measured in volts
◍ Notifying state regulatory body.
Answer: All unusual or extraordinary discharges within 24 hours
◍ Hydroxide.
Answer: Gives water its greatest capacity to neutralize acids
◍ Minimum number of people on-site at a confined space site.
Answer: Three, with one entering a manhole
◍ Chemical Oxygen Demand (COD) test.
Answer: Used to make process changes immediately if a problem develops
◍ Mosquitoes.
Answer: Nuisance organisms controlled by disturbed water surface
◍ Water.
Answer: Used as a standard because of its unique properties and availability
in pure state
, ◍ Sodium nitrate.
Answer: Not a hydrate
◍ Ideal wastewater velocity through a screen channel.
Answer: 1.5 ft/s (feet per second)
◍ Bacteria.
Answer: Main 'workers' in the activated sludge process
◍ Notifying state regulatory body.
Answer: Noncompliance that could affect state's waters or endanger public
health within 24 hours
◍ Tests to be performed within 15 minutes after collection.
Answer: pH, temperature, and dissolved oxygen
◍ Placing vehicle when working in a manhole.
Answer: Between the manhole and oncoming traffic
◍ Carbon monoxide.
Answer: Slightly lighter than air
◍ Ideal wastewater velocity for grit removal in a grit chamber.
Answer: 0.7 to 1.4 ft/s
◍ Ladders in a trench.
Answer: Required every 25 feet
◍ Percentage of dissolved solids.
Answer: 70% of total solids
◍ A-B-C fire extinguishers.
Answer: Should be in pump stations
◍ Preserving a dissolved oxygen sample.
Answer: With sulfuric acid for 8 hours for analysis using the modified
Winkler method
◍ Solids content in wastewater.
