AWWA Equipment and Material Standards 2 — Questions and Answers
Question 1: Which AWWA standard covers resilient-seated gate valves for water supply service?
- AWWA C509 (Correct answer)
- AWWA C500
- AWWA C504
- AWWA C507
Correct answer: AWWA C509
AWWA C509 specifies resilient-seated gate valves (3-inch through 12-inch) used in water distribution systems.
Question 2: AWWA C651 provides disinfection procedures primarily for which type of infrastructure?
- Water storage tanks
- Newly installed water mains (Correct answer)
- Pump stations
- Water treatment filters
Correct answer: Newly installed water mains
AWWA C651 covers procedures for disinfecting newly installed or repaired water mains before placing them into service.
Question 3: What material property is most critical when selecting ductile iron pipe per AWWA C151?
- Electrical conductivity
- Tensile strength and yield strength (Correct answer)
- Thermal expansion coefficient
- Color coding of the pipe surface
Correct answer: Tensile strength and yield strength
AWWA C151 specifies minimum tensile strength of 60,000 psi and yield strength of 42,000 psi for ductile iron pipe.
Question 4: Which AWWA standard addresses the installation of ductile iron water mains and appurtenances?
- AWWA C600 (Correct answer)
- AWWA C605
- AWWA C900
- AWWA C301
Correct answer: AWWA C600
AWWA C600 covers installation of ductile iron water mains and their appurtenances.
Question 5: Fusion-bonded epoxy lining for ductile iron pipe must meet which AWWA standard?
- AWWA C213 (Correct answer)
- AWWA C205
- AWWA C104
- AWWA C210
Correct answer: AWWA C213
AWWA C213 covers fusion-bonded epoxy coatings for the interior and exterior of steel water pipelines, and is referenced for ductile iron as well.
Question 6: Per AWWA standards, what is the minimum cover depth typically required over a buried water main in a street?
- 12 inches
- 24 inches
- 36 inches (Correct answer)
- 48 inches
Correct answer: 36 inches
AWWA C600 recommends a minimum of 36 inches of cover over water mains in street applications to protect against traffic loads and frost.
Question 7: Which AWWA standard governs the design and construction of concrete pressure pipe, bar-wrapped, steel cylinder type?
- AWWA C303 (Correct answer)
- AWWA C301
- AWWA C302
- AWWA C304
Correct answer: AWWA C303
AWWA C303 covers bar-wrapped, steel cylinder type concrete pressure pipe used in water transmission.
AWWA Equipment and Material Standards 2
Which AWWA standard covers resilient-seated gate valves for water supply service?