CWEA Collections Grade 3 Exam

CWEA Collections Grade 3 Exam | 2024 / 2025 Update Questions and Verified Answers | 100% Correct | Grade A

Question:

Which chemical may be used for odor control in a sewer system?

• Calcium chloride
• Hydrogen peroxide
• Oxidized aluminum
• Sodium chloride

Answer:

• Hydrogen peroxide

Question:

What information must be on a warning tag attached to a switch that has been locked out?

• Directions for removing tag.
• Name of nearest physician to call in case of emergency.
• Signature of person who locked out switch and who is the only person

authorized to remove tag. 1 / 4

• Time to unlock switch.

Answer:

• Signature of person who locked out switch and who is the only person

authorized to remove tag.

Question:

Under what conditions must each member of the rescue service practice permit space rescues?

• At least once a year in a simulated situation or by the satisfactory

performance of an actual rescue.

• At least twice a year in simulated situations.
• At least once a year in simulated situation using non-representative space

conditions

• At least four times a year.

Answer:

• At least once a year in a simulated situation or by the satisfactory

performance of an actual rescue.

Question:

How is a permit-required space described?

• Has or may contain atmospheric, engulfment, design, or other serious

health/safety hazard.

• Is large enough to enter and work in and is meant for continuous

occupancy. 2 / 4

• Is large enough to enter and work in and has an unrestricted entry/exit.
• Never contains an atmospheric or engulfment hazard.

Answer:

• Has or may contain atmospheric, engulfment, design, or other serious

health/safety hazard.

Question:

What are the three duties of personnel in a Confined Space entry?

• Authorized entrants, parking attendants, entry supervisors.
• Unauthorized entrants, attendants, entry supervisors.
• Authorized entrants, attendants, entry supervisors.
• Authorized entrants, attendants, evening supervisors

Answer:

• Authorized entrants, attendants, entry supervisors.

Question:

What is an important element of hydrogen sulfide production?

• Flow velocity.
• Pipe materials.
• Amount of odor present.
• Amount of inorganic materials.

Answer:

• Flow velocity. 3 / 4

Question:

Which of the following is the most common factor leading to the generation of hydrogen sulfide in sewers?

• Anaerobic conditions.
• Constantly high velocity of flow in sewers.
• Low concentrations of ferrous sulfide.
• Presence of highly soluble fats and oils.

Answer:

• Anaerobic conditions.

Question:

A category 2 SSO is:

• any SSO which does not reach surface waters.
• not reportable.
• preventable.
• any SSO which is not category 1.

Answer:

• any SSO which is not category 1.

Question:

Which tool would you use for cleaning under a pipe, or hard dirt near a pipe?

• Miner's pick.
• Wrench.
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