Operation and Maintenance UPDATED Actual Exam Questions and CORRECT Answers
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Course
Operation and Maintenance
Institution
Operation And Maintenance
Operation and Maintenance UPDATED
Actual Exam Questions and CORRECT
Answers
when cleaning stoppages between properry lines and the main line sewer, the access is called
a/an
a) Manhole
b) Invert
c) Cleanout
d) Channel - CORRECT ANSWER- c) Cleanout
Operation and Maintenance UPDATED
Actual Exam Questions and CORRECT
Answers
when cleaning stoppages between properry lines and the main line sewer, the access is called
a/an
a) Manhole
b) Invert
c) Cleanout
d) Channel - CORRECT ANSWER✔✔- c) Cleanout
Which of the following would not cause stoppages in sewers?
a) Adverse hydraulic conditions
b) Grease
c) High velocities
d) Roots - CORRECT ANSWER✔✔- c) High velocities
Metal detectors may be used to locate
a) Asbestos-cement pipe
b) Vitrified clay pipe
c) Buried manhole covers
d) All of the above - CORRECT ANSWER✔✔- c) Buried manhole covers
Normal hydraulic cleaning of a sewer line removes
a) Gases
b) Grit
,c) Heavy debris
d) All of the above - CORRECT ANSWER✔✔- A) Gases
Efforts to eliminate infiltration and inflow in a collection system are made primarily to
a) Reduce hydraulic loads
b) Reduce dilution of wastewater
c) Prevent debris from entering into pipes
d) Provide for a higher groundwater table - CORRECT ANSWER✔✔- A) Reduce hydraulic
loads
A bell of a pipe that is chipped during installation should not be left in place because it may
cause _____________
a) Infiltration
b) Exfiltration
c) Root intrusion
d) All of the above - CORRECT ANSWER✔✔- All of the above
The atmosphere in a sewer system may be
a) Tested with the proper equipment
b) Corrosive to metal
c) Perfectly okay to breathe
d) All of the above - CORRECT ANSWER✔✔- All of the above
When nearby residents complain of objectionable odors emanating from a pumping station,
you should
a) Tell the residents that you have no control over odors
b) Use copious amounts of lime to raise the pH of the septic wastewater
c) Determine the cause of lime to raise the pH of the septic wastewater
, d) Use commercial masking agents - CORRECT ANSWER✔✔- c) Determine the cause of
the odors and take corrective action
When working in a manhole and a rumbling sound is heard, what is most likely happening?
a) Light traffic in the distance
b) Increase in flow from nearby lift station
c) Rodents in the system have been disturbed
d) None of the above - CORRECT ANSWER✔✔- B) Increase in flow from nearby lift
station
Of the following chemicals listed, which is/are of benefit for odor control at pumping stations
or in the collection system?
a) Chlorine
b) Hydrochloric acid
c) Hydrogen peroxide
d) Both a and c - CORRECT ANSWER✔✔- D) Both a and c
The location of the clearing tool must be known at all times when using a power- rodding
machine so
a) There is enough rod left over if it breaks
b) You know where to place the debris trap
c) You will know where to place the leader tool if the rod becomes coiled
d) You will know where to dig to recover the tool if it becomes stuck - CORRECT
ANSWER✔✔- D) You will know where to dig to recover the tool if it becomes stuck
In which direction would you place the nozzle in the sewer when using high-velocity
cleaning machines?
a) Upstream in the sewer against the flow
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