5.1 Quiz – Sizing Water Service Pipes and Testing
- When sizing water service pipes using the simplified method, what is the minimum pressure that can be supplied to the service entry?
- Using simplified sizing, what is the maximum developed length from the property line to the most distant fixture?
- Does the Plumber have to make allowances for the elevation when sizing a water service pipe using simplified method?
- Sizing with the simplified method does the Plumber have to know the velocity of the water?
- When sizing using the simplified method does the table in the NPC have different columns for water service and water distribution?
- What 2 factors must be known when sizing with the simplified method?
- When sizing using the small commercial method; according to the NPC, what is the maximum pipe size permitted?
- Of the 5 tables used to figure out fixture unit ratings for water pipe sizing; what table in the NPC is used to find fixture unit ratings for fixtures not listed in table
2.6.3.2. (A)? - There are 3 sizing charts used with the small commercial method, what are the 3 pressure ranges to pick from?
- When figuring out the pressure range using small commercial method for a water service pipe, what 2 factors need to be considered?
- What column in table 2.6.3.2. (A) in the NPC is used for fixture unit ratings when sizing a water service pipe? (Circle the correct answer)
Hot Cold total - When sizing a water service pipe when using small commercial method, what section of piping is used to find the developed length?
- How do you know the velocity of the water when sizing a water service pipe using the small commercial method. Is it given on the sizing diagram (blueprints) or does the table tell you?
- A municipal water main has 440 kpa, the water service pipe has a developed length of 68m to the water meter. It has 75 fixture units and an elevation change of 4.2m; what size water service pipe would be required?
- A municipal water main has 490 kpa, the water service pipe has a developed length of 21m to the water meter. It has 49 fixture units and an elevation change of 3.7m; what size water service pipe would be required?
- A municipal water main has 460 kpa, the water service pipe has a developed length of 15m to the water meter. It has 257 fixture units and an elevation change of 5.5m; what size water service pipe would be required?
- When testing potable water pipe with air, what is the minimum pressure (kpa) and for how long must it be maintained according to the NPC?
- If the manufacturer doesn’t recommend an air test (ie. Pex), what shall be used according to the NPC?
- What is used as a replacement for air for testing some smaller systems, if water cannot be used?