CWEA Exam Questions With 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 In a 25 MPH zone, Distance of Flagger Station in the Advanced of a Work Space should be: - Answer 155 feet What is a flow rate - Answer Q = AV Flow = Area x Velocity