CSLB Trade — Plumbing (C-36)

What is the minimum slope for a 2 inch horizontal drainage pipe?

1. A1/16 inch per foot
2. B1/4 inch per footĐúng
3. C1/2 inch per foot
4. D1/8 inch per foot

Vì sao: The CPC requires a minimum uniform slope of 1/4 inch per foot (about 2 percent) for horizontal drainage pipe 2-1/2 inches and smaller. The 1/8 inch per foot minimum is allowed only for pipe 3 inches and larger, so it is too flat for a 2 inch line. The 1/16 inch and 1/2 inch values are not the code minimum for this size.2022 California Plumbing Code (CPC) §708.1

A temperature-and-pressure (T&P) relief valve on a residential storage water heater must be set to open at a temperature no higher than which value?

1. A150°F
2. B210°FĐúng
3. C180°F
4. D240°F

Vì sao: A T&P relief valve protects the tank against overheating and must be rated so its temperature element opens at no more than 210°F. The pressure element is a separate rating. Both must be listed and approved for the appliance.2022 California Plumbing Code (CPC) §608.3