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CWEA COLLECTIONS SYSTEM MAINTENANCE GRADE 3 2024 QUESTIONS AND ANSWERS
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CWEA COLLECTIONS SYSTEM MAINTENANCE GRADE 3 2024 QUESTIONS AND ANSWERS
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CWEA COLLECTIONS SYSTEMMAINTENANCE GRADE 3
Which chemical may be used for odor control in a sewer system?
a. Calcium chloride
b. Hydrogen peroxide
c. Oxidized aluminum
d. Sodium chloride - ANSWERS-b. Hydrogen peroxide
What information must be on a warning tag attached to a switch that has been
locked out?
a. Directions for removing tag.
b. Name of nearest physician to call in case of emergency.
c. Signature of person who locked out switch and who is the only person
authorized to remove tag.
d. Time to unlock switch. - ANSWERS-c. Signature of person who locked out
switch and who is the only person authorized to remove tag.
Under what conditions must each member of the rescue service practice permit
space rescues?
a. At least once a year in a simulated situation or by the satisfactory performance
of an actual rescue.
,b. At least twice a year in simulated situations.
c. At least once a year in simulated situation using non-representative space
conditions
d. At least four times a year. - ANSWERS-a. At least once a year in a simulated
situation or by the satisfactory performance of an actual rescue.
How is a permit-required space described?
a. Has or may contain atmospheric, engulfment, design, or other serious
health/safety hazard.
b. Is large enough to enter and work in and is meant for continuous occupancy.
c. Is large enough to enter and work in and has an unrestricted entry/exit.
d. Never contains an atmospheric or engulfment hazard. - ANSWERS-a. Has or
may contain atmospheric, engulfment, design, or other serious health/safety
hazard.
What are the three duties of personnel in a Confined Space entry?
a. Authorized entrants, parking attendants, entry supervisors.
b. Unauthorized entrants, attendants, entry supervisors.
c. Authorized entrants, attendants, entry supervisors.
d. Authorized entrants, attendants, evening supervisors - ANSWERS-c. Authorized
entrants, attendants, entry supervisors.
What is an important element of hydrogen sulfide production?
a. Flow velocity.
, b. Pipe materials.
c. Amount of odor present.
d. Amount of inorganic materials. - ANSWERS-a. Flow velocity.
Which of the following is the most common factor leading to the generation of
hydrogen sulfide in sewers?
a. Anaerobic conditions.
b. Constantly high velocity of flow in sewers.
c. Low concentrations of ferrous sulfide.
d. Presence of highly soluble fats and oils. - ANSWERS-a. Anaerobic conditions.
A category 2 SSO is:
a. any SSO which does not reach surface waters.
b. not reportable.
c. preventable.
d. any SSO which is not category 1. - ANSWERS-d. any SSO which is not category 1.
A Flagger should Stand?
A. On the shoulder adjacent to traffic being controlled
B. In the closed lane before stopping vehicle traffic
C. In the traffic lane.
D. As stated in "A" or "B" above. - ANSWERS-D. As stated in "A" or "B" above.
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