AWWA Equipment and Material Standards 3 — Questions and Answers
Question 1: Which standard defines performance requirements for double check valve backflow prevention assemblies used in water service?
- AWWA C510 (Correct answer)
- AWWA C512
- AWWA C511
- AWWA C500
Correct answer: AWWA C510
AWWA C510 covers double check valve backflow prevention assemblies for water service applications.
Question 2: What does the AWWA C700 series of standards primarily address?
- Large diameter transmission mains
- Cold-water meters (Correct answer)
- Chemical feed equipment
- Pump station design
Correct answer: Cold-water meters
The AWWA C700 series covers cold-water meters for customer service, including displacement, turbine, and compound meters.
Question 3: Per AWWA C651, what is the minimum free chlorine residual required at the end of the disinfection contact period for new water mains?
- 0.2 mg/L
- 10 mg/L (Correct answer)
- 25 mg/L
- 50 mg/L
Correct answer: 10 mg/L
AWWA C651 requires a minimum 10 mg/L free chlorine residual maintained throughout the main after the disinfection period.
Question 4: AWWA C900 standard covers PVC pressure pipe intended for use in what size range?
- 4-inch through 12-inch (Correct answer)
- 1/2-inch through 4-inch
- 14-inch through 36-inch
- 1-inch through 3-inch
Correct answer: 4-inch through 12-inch
AWWA C900 covers PVC pressure pipe and fabricated fittings in 4-inch through 12-inch nominal diameter for water distribution.
Question 5: Which AWWA standard covers the manufacture of fiberglass pressure pipe used in water supply?
- AWWA C950 (Correct answer)
- AWWA C905
- AWWA C906
- AWWA C960
Correct answer: AWWA C950
AWWA C950 covers fiberglass pressure pipe for water distribution and transmission systems.
Question 6: What type of joint is specified by AWWA C111 for ductile iron and gray iron pipe?
- Welded butt joint
- Rubber-gasket joint (Correct answer)
- Flanged joint
- Push-on restrained joint
Correct answer: Rubber-gasket joint
AWWA C111 covers rubber-gasket joints for ductile iron pressure pipe and fittings.
Question 7: Which AWWA standard applies to spiral-welded steel pipe for water transmission?
- AWWA C200
- AWWA C201
- AWWA C202 (Correct answer)
- AWWA C203
Correct answer: AWWA C202
AWWA C202 covers mill-type steel water pipe, which includes spiral-welded fabrication methods.
AWWA Equipment and Material Standards 3
Which standard defines performance requirements for double check valve backflow prevention assemblies used in water service?