CWEA Collections System Maintenance Grade 3 | 82
Questions with 100% Correct Answers
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. - correct answerD. As stated in "A" or
"B" above.
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 - correct answerD. 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 - correct answerA. 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 - correct answerc. 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 - correct answerb. 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. - correct answerc. 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 - correct answerc. 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 - correct answerb. 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. - correct answerc. 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. - correct answera. 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. - correct
answera. 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 - correct
answerc. 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. - correct answera. 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.
Questions with 100% Correct Answers
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. - correct answerD. As stated in "A" or
"B" above.
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 - correct answerD. 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 - correct answerA. 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 - correct answerc. 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 - correct answerb. 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. - correct answerc. 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 - correct answerc. 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 - correct answerb. 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. - correct answerc. 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. - correct answera. 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. - correct
answera. 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 - correct
answerc. 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. - correct answera. 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.
