1|Page
CWEA Mechanical Technologist Grade 3 Exam
||Verified Exam!!||Questions with Correct Answers and
explanations LATEST THIS YEAR -JUST
RELEASED.pdf|| NEWEST EXAM!!
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
,2|Page
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.
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. - Answer-D. 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 - Answer-D. Within 2 hours
, 3|Page
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.
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
CWEA Mechanical Technologist Grade 3 Exam
||Verified Exam!!||Questions with Correct Answers and
explanations LATEST THIS YEAR -JUST
RELEASED.pdf|| NEWEST EXAM!!
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
,2|Page
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.
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. - Answer-D. 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 - Answer-D. Within 2 hours
, 3|Page
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.
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
