CWEA Collections System Maintenance Grade 3 | 82 Questions with 100% Correct Answers
Legally responsible officals are required to report catagory 1 sanitary sewer overflows: -
ANSWER-Within two hours
When testing a manhole for explosive gases when should the first test be made? - ANSWER-
Before removing the manhole cover
When setting up to ventilate a manhole,the air inlet should be how many feet above street
level? - ANSWER-2.0 feet
Which chemical may be used for odor control in a sewer system? - ANSWER-Hydrogen peroxide
A category 2 is: - ANSWER-Any sso which is not a category 1
Which tool would you use for cleaning under a pipe, or hard dirt near a pipe? - ANSWER-Miner's
pick
When pouring a concrete slab, which of the following tools is used to finish the concrete? -
ANSWER-Trowel
How can the velocity of water flowing in a sewer be estimated? - ANSWER-Measuring the time
it takes for the dye to be carried by the wastewater between the two manholes
When a grade conflict exist between a water main and a sewer main, which of the following is
the best solution? - ANSWER-Have the water main adjusted and hold the grade on the sewer
main
A source of infiltration in a collection is: - ANSWER-Broken pipe joints
Pipe materials that are the least susceptible to corrosion by acids formed from gases generated
in a sewer is: - ANSWER-VCP
Liners are installed in sewers to correct problems caused by: - ANSWER-Infiltration
"Schedule 40" refers to: - ANSWER-Wall thickness
Category 1 SSO is: - ANSWER-A. Any volume reaching a water surface
B. Any volume entering a storm drain and not recovered
C. Any spill greater the a 1000 gallons
D. ALL THE ABOVE
Legally responsible officals are required to report catagory 1 sanitary sewer overflows: -
ANSWER-Within two hours
When testing a manhole for explosive gases when should the first test be made? - ANSWER-
Before removing the manhole cover
When setting up to ventilate a manhole,the air inlet should be how many feet above street
level? - ANSWER-2.0 feet
Which chemical may be used for odor control in a sewer system? - ANSWER-Hydrogen peroxide
A category 2 is: - ANSWER-Any sso which is not a category 1
Which tool would you use for cleaning under a pipe, or hard dirt near a pipe? - ANSWER-Miner's
pick
When pouring a concrete slab, which of the following tools is used to finish the concrete? -
ANSWER-Trowel
How can the velocity of water flowing in a sewer be estimated? - ANSWER-Measuring the time
it takes for the dye to be carried by the wastewater between the two manholes
When a grade conflict exist between a water main and a sewer main, which of the following is
the best solution? - ANSWER-Have the water main adjusted and hold the grade on the sewer
main
A source of infiltration in a collection is: - ANSWER-Broken pipe joints
Pipe materials that are the least susceptible to corrosion by acids formed from gases generated
in a sewer is: - ANSWER-VCP
Liners are installed in sewers to correct problems caused by: - ANSWER-Infiltration
"Schedule 40" refers to: - ANSWER-Wall thickness
Category 1 SSO is: - ANSWER-A. Any volume reaching a water surface
B. Any volume entering a storm drain and not recovered
C. Any spill greater the a 1000 gallons
D. ALL THE ABOVE
