CWEA COLLECTIONS SYSTEM
MAINTENANCE GRADE 3 ACTUAL EXAM
PAPER 2026 82 QUESTIONS WITH 100%
CORRECT ANSWERS GRADED A+
⩥ Legally responsible officials are required to report category 1 sanitary
sewer overflows?
A. Within 30 days
B. Before end of the day
C. As soon as possible
D. Within 2 hours. Answer: D. Within 2 hours
⩥ When working in confined spaces or sewers, what form of lighting
would you use?
A. Mirrors to direct the sunlight or explosion proof lighting.
B. Ordinary electric lights
C. Propane, Gas, or kerosene lanterns
D. Special matches. Answer: A. Mirrors to direct the sunlight or
explosion proof lighting.
⩥ What can happen if water-based substances are used to extinguish
electrical fires?
,a. Nothing but extinguish the fire
b. The fumes are not harmful
c. Receive an electrical shock
d. They will corrode the electrical contacts. Answer: c. Receive an
electrical shock
⩥ When testing a manhole for explosive gases when should the first
tests be made?
a. After removing the manhole cover
b. Before removing the manhole cover
c. At any time
d. After ventilation. Answer: b. Before removing the manhole cover
⩥ Atmospheric hazards encountered in manholes can include:
a. non-explosive atmospheres.
b. non-toxic atmosphere.
c. lack of oxygen.
d. non-flammable atmospheres.. Answer: c. lack of oxygen.
⩥ When setting up to ventilate a manhole, the air inlet should be how
many feet above street level?
a. 4.0
b. 3.0
, c. 2.0
d. 1.0. Answer: c. 2.0
⩥ Which chemical may be used for odor control in a sewer system?
a. Calcium chloride
b. Hydrogen peroxide
c. Oxidized aluminum
d. Sodium chloride. Answer: 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.. Answer: 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.
MAINTENANCE GRADE 3 ACTUAL EXAM
PAPER 2026 82 QUESTIONS WITH 100%
CORRECT ANSWERS GRADED A+
⩥ Legally responsible officials are required to report category 1 sanitary
sewer overflows?
A. Within 30 days
B. Before end of the day
C. As soon as possible
D. Within 2 hours. Answer: D. Within 2 hours
⩥ When working in confined spaces or sewers, what form of lighting
would you use?
A. Mirrors to direct the sunlight or explosion proof lighting.
B. Ordinary electric lights
C. Propane, Gas, or kerosene lanterns
D. Special matches. Answer: A. Mirrors to direct the sunlight or
explosion proof lighting.
⩥ What can happen if water-based substances are used to extinguish
electrical fires?
,a. Nothing but extinguish the fire
b. The fumes are not harmful
c. Receive an electrical shock
d. They will corrode the electrical contacts. Answer: c. Receive an
electrical shock
⩥ When testing a manhole for explosive gases when should the first
tests be made?
a. After removing the manhole cover
b. Before removing the manhole cover
c. At any time
d. After ventilation. Answer: b. Before removing the manhole cover
⩥ Atmospheric hazards encountered in manholes can include:
a. non-explosive atmospheres.
b. non-toxic atmosphere.
c. lack of oxygen.
d. non-flammable atmospheres.. Answer: c. lack of oxygen.
⩥ When setting up to ventilate a manhole, the air inlet should be how
many feet above street level?
a. 4.0
b. 3.0
, c. 2.0
d. 1.0. Answer: c. 2.0
⩥ Which chemical may be used for odor control in a sewer system?
a. Calcium chloride
b. Hydrogen peroxide
c. Oxidized aluminum
d. Sodium chloride. Answer: 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.. Answer: 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.
