Ontario Pipeline - Fall 2013 - (Page 39)
DEPARTMENT | CERTIFICATION
Test your knowledge.
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 contact firstname.lastname@example.org
5. The advantage of a balanced
mechanical seal is that
a. it does not turn with the shaft.
b. it is balanced with the shaft.
c. the wearing surface between the
ground surface does not vary
regardless of the suction head.
d. the ease of replacement.
2. Contaminant monitoring
requirements can depend on
a. previous violations of maximum
contaminant levels (MCLs).
b. the result of a vulnerability
c. the size of the water system.
d. all of the above.
3. When comparing friction loss in
various types of pumps, a larger
Hazen-Williams C value indicates
a. is more durable.
b. is rougher outside.
c. is smoother inside.
d. is able to withstand a
8. When should ammonia be
added to the water when making
disinfectant chloramines to
a. Before the chlorine is added
b. After the chlorine is added
c. During filtration
d. Before filtration
6. Which of the following conditions
must you change when your
chlorine residual is in hypochlorite
d. Total alkalinity
1. The primary health risk associated
with trihalomethanes (THMs) is
a. gastrointestinal diseases.
b. nervous system damage.
d. increased blood pressure.
9. What precipitate is formed in
a. Aluminum hydroxide
b. Complex organoaluminum compounds
c. Complex sulphate compounds
and aluminum salts
d. Aluminum salts and organosulfate compounds.
7. Sodium thiosulfate is added to a
microbiological sample bottle in
a. extend the allowable holding
time from 6 to 30 hours.
b. react with nitrates that interfere
with the MPN test.
c. remove any chlorine
d. ensure sterilization of the
4. The angle of repose is the angle of
c. trench excavation.
d. unsupported loose soil.
10. A water sample contains 120
mg/L of calcium and 54 mg/ L
of magnesium. What is the total
hardness as CaCO3?
a. 120mg/L as CaCO3
b. 154 mg/L as CaCO3
c. 174 mg/L as CaCO3
d. 198 mg/L as CaCO3
See answers on page 46.
DEPARTMENT | WELCOME
Welcome to Our
New OWWA Members
Mike Brannon, City of Toronto
Doug Campbell, Town of Fort Erie
Frank Godin, EMA Canada Inc
Carol Hall, City of Ottawa
Rob Harten, PUC Services Inc.
Nils Holm, CSA GROUP
Erik Lepik, Toronto Water RC Harris
Brenda Lucas, SOWC
Tania Lungo, University of Toronto
Shean McGhee, City of Elliot Lake
Cheryl McKendrick, City of Ottawa
Brian Mergelas, Watertap
Kelly Oakley, City of Barrie
Massimo Pontone, Ontario Clean
Blair Russell, Madison Chemical Industries
Cordell Samuels, Regional Municipality
Tonia Van Dyk, C&M Environmental
Walt Visser, Township of Centre Wellington
Ontario Clean Water Agency
O N T A R I O P I P E L I N E | FALL 2013 | 39
Table of Contents for the Digital Edition of Ontario Pipeline - Fall 2013
From the Publications Chair
The OWWA Report
The OMWA Report
The OWWEA Report
From Our AWWA Director
Using Social Media to Enhance Water Effi ciency, Public Education and Outreach
Engaging Residents through Social Media
WaterISAC – An Essential Part of Your Water or Wastewater Utility’s Security and Emergency Preparedness Toolbox
Alliance for Water Effi ciency Helps Municipalities Develop Effective Water Conservation Programs
Don’t Flush … Your Drugs! Keep Our Source Waters Clean
Water Testing in the Field – Guatemala
Demystifying Prefabricated Valve Chambers
Ask the Board
Certifi cation Corner
Welcome New Members
Calendar of Events
OWWEA Member Listing
Index of Advertisers | Ad.com
Ontario Pipeline - Fall 2013