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CWEA Environmental Compliance Inspector Grade 1 | 2025 Questions with 100% Correct Answers Verified Updated 2025 / 2026 $12.99
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CWEA Environmental Compliance Inspector Grade 1 | 2025 Questions with 100% Correct Answers Verified Updated 2025 / 2026

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CWEA Environmental Compliance Inspector Grade 1 | 2025 Questions with 100% Correct Answers Verified Updated 2025 / 2026

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  • January 27, 2024
  • 27
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers
  • cwea
  • grade 1
  • CWEA
  • CWEA
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NurseFerian
CWEA Environmental Compliance Inspector Grade

1 (Q&A)

1. Floatable solids are easy to measure. True or False?: False

2. A well operated digester normally receives sludge at about %

volatile solid and reduces it to about % volatile solids.: -

70-75%, 25-30%

3.According to OSHA, which of the following oxygen in air concentration is

the lowest safe concentration for humans to breathe in order to avoid the

hazard of oxygen deficiency?: 19.5% oxygen

4. The population equivalent factor for BOD is: 0.17 lb/day/BOD/person

5. Which microorganisms are found in a good settling mixed liquor?:

Rotifers, stalked ciliates, and free swimming ciliates

6. Which heavy metal is the most stringent for land application?: Mercury

7. Grit chambers that are designed to remove grit at a velocity of: 0.5 to

1.0 ft/sec

8. The purpose of adding sodium thiosulfate to a microbiological (such

as fecal coliform) sample bottle is to: Remove any chlorine residual



,present

9. Which of the following types of wastewater would settling occur

most rapidly?

Cold wastewater

Old wastewater

Septic wastewater

Strong wastewater: Strong wastewater

10.The disadvantage of using a constant percentage return activated

sludge flow control is: Clarifier is subjected to maximum solids loading

when it contains maximum amount of sludge

11.Under which conditions should sludge wasting normally be increased?:

A dark brown scummy foam appears on the aeration tank surface

12.The outlet of a forced ventilation system for a chlorinator room should

be located: Near the floor

13.If packing is not maintained properly: There will be a loss of suction

from air being allowed to enter the pipe.

14.Turbidity in wastewater is caused by: Finely divided suspended

material

15.One of the primary reasons why air should be excluded from the



, digester is that...: The entrance of air mixed with gas produced in the

digester could create an explosive mixture

16.True or False: Barminutors and comminutors are installed for

different purposes: False

17.What are the end products of the aerobic biochemical reaction?: H2O

and CO2

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