CWEA Collections System
Maintenance Grade 3-4 9-15-24
2026-2027 Updated
** Expert-Verified Explanation
** Questions with Verified Answer
** New Edition
** 100% Guaranteed Pass
** 100% Correct Answers
, A Flagger should Stand? D. As stated in "A" or "B" above.
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.
Legally responsible officials are required to report D. Within 2 hours
category 1 sanitary sewer overflows?
A. Within 30 days
B. Before end of the day
C. As soon as possible
D. Within 2 hours
When working in confined spaces or sewers, what form A. Mirrors to direct the sunlight or explosion proof lighting.
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
What can happen if water-based substances are used to c. Receive an electrical shock
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
When testing a manhole for explosive gases when b. Before removing the manhole cover
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
Atmospheric hazards encountered in manholes can c. lack of oxygen.
include:
a. non-explosive atmospheres.
b. non-toxic atmosphere.
c. lack of oxygen.
d. non-flammable atmospheres.
When setting up to ventilate a manhole, the air inlet c. 2.0
should be how many feet above street level?
a. 4.0
b. 3.0
c. 2.0
d. 1.0
Which chemical may be used for odor control in a sewer b. Hydrogen peroxide
system?
a. Calcium chloride
b. Hydrogen peroxide
c. Oxidized aluminum
d. Sodium chloride
What information must be on a warning tag attached to a c. Signature of person who locked out switch and who is the only person
switch that has been locked out? authorized to remove tag.
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.
Under what conditions must each member of the rescue a. At least once a year in a simulated situation or by the satisfactory performance
service practice permit space rescues? of an actual rescue.
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.
Maintenance Grade 3-4 9-15-24
2026-2027 Updated
** Expert-Verified Explanation
** Questions with Verified Answer
** New Edition
** 100% Guaranteed Pass
** 100% Correct Answers
, A Flagger should Stand? D. As stated in "A" or "B" above.
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.
Legally responsible officials are required to report D. Within 2 hours
category 1 sanitary sewer overflows?
A. Within 30 days
B. Before end of the day
C. As soon as possible
D. Within 2 hours
When working in confined spaces or sewers, what form A. Mirrors to direct the sunlight or explosion proof lighting.
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
What can happen if water-based substances are used to c. Receive an electrical shock
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
When testing a manhole for explosive gases when b. Before removing the manhole cover
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
Atmospheric hazards encountered in manholes can c. lack of oxygen.
include:
a. non-explosive atmospheres.
b. non-toxic atmosphere.
c. lack of oxygen.
d. non-flammable atmospheres.
When setting up to ventilate a manhole, the air inlet c. 2.0
should be how many feet above street level?
a. 4.0
b. 3.0
c. 2.0
d. 1.0
Which chemical may be used for odor control in a sewer b. Hydrogen peroxide
system?
a. Calcium chloride
b. Hydrogen peroxide
c. Oxidized aluminum
d. Sodium chloride
What information must be on a warning tag attached to a c. Signature of person who locked out switch and who is the only person
switch that has been locked out? authorized to remove tag.
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.
Under what conditions must each member of the rescue a. At least once a year in a simulated situation or by the satisfactory performance
service practice permit space rescues? of an actual rescue.
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.
