Ontario Pipeline - Summer 2015 - (Page 35)

DEPARTMENT | CERTIFICATION CERTIFICATION CORNER TEST YOUR KNOWLEDGE. BY VENKAT RAMANI AND TORY COLLING - Walkerton Clean Water Centre Questions below resemble those appearing on certification exams. Your comments and suggestions are welcome. If you have specific topics you would like to have included, please send them to waterinfo@owwa.ca 1. Iron and manganese can be found in water systems in which form? a) Dissolved form (Fe2+ and Mn2+) b) Particulate form (Fe3+ and Mn4+) c) Colloidal form d) All of the above 2. Cone of depression of a well is: a) The water level when the well is not taking water. b) Formed as free surface water pumps toward the well intake. c) The well's drawdown level. d) The amount of water that can be taken out from the ground. c) Cavitation d) Cross connection 7. Jar testing can be used to: a) Digest samples before analysis. b) Determine the optimal coagulant dosage. c) Mimic the full scale water treatment process. d) Both b and c. 3. The addition of chlorine gas will: a) Increase alkalinity b) Increase pH c) Decrease pH d) All of the above 8. Which of the statements are true: a) CT = disinfectant concentration (mg/L) × contact time (minutes). b) CT is used to determine the appropriate dosage of disinfectant to achieve required pathogen inactivation. c) CT can only be applied to chlorine disinfectant. d) Both a and b. 4. Heterotrophic plate counts are an indication of: a) Overall water quality after treatment and in the distribution system b) Potential presence of a pathogen c) Water safety d) Cryptosporidium 9. A tank is 18 m long, 12 m wide and 8 m deep. Pumping rate to the tank is 50,000 m3/day. How long will it take to fill up the entire tank (minutes)? a) 50 minutes b) 29 minutes c) 500 minutes d) 2,980 minutes 5. A curb stop is: a) A water service shutoff valve located near the property line, between the water main and the building. b) Used for storage of treated water. c) A tool to detect leaks in the distribution system. d) A backflow prevention device. 6. A connection between a potable water system and an unapproved water supply is called: a) Pitless adaptor connection b) Check valve connection 10. Which statement is false? a) Alkalinity is the ability to resist change in pH. b) Alkalinity does not affect the coagulation process. c) Alkalinity is mostly made up of bicarbonates, carbonates and hydroxides. d) Alkalinity is also known as the buffering capacity. See answers on page 46. O N T A R I O P1I P E L I N E 713128_SAF.indd | SUMMER2014-12-05 2015 | 35 11:32 AM http://www.saftflo.com

Table of Contents for the Digital Edition of Ontario Pipeline - Summer 2015

From the Publications Chair
The OWWA Report
The OMWA Report
The OWWEA Report
From Our AWWA Director
Water on the Water: Ontario’s Water Conference and Trade Show
Conference Sponsors
2015 Fuller Award
2015 OWWA Awards
Student Art Awards
When Big Users Cut Back, Utilities Left Scrambling
Small Town Dilemma
Committee Reports
Certification Corner
Calendar of Events
Welcome New Members
OWWEA Member Listing
OWWEA Member News
Index of Advertisers

Ontario Pipeline - Summer 2015