Sanitary Drainage Systems Flashcards
7 cards from real CPD practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Sanitary Drainage Systems flashcards as text
A building drain that receives the discharge from a grease interceptor must be sized based on:
Answer: Only the interceptor's rated flow in GPM converted to DFUs
The building drain downstream of a grease interceptor is sized based on the interceptor's rated flow capacity converted to equivalent drainage fixture units.
What is the purpose of a P-trap in a sanitary drainage system?
Answer: Maintain a water seal to block sewer gases
A P-trap holds a water seal that prevents sewer gases and vermin from entering the building through the drain opening.
Which of the following fixtures is allowed to share a common vent under IPC wet venting rules?
Answer: A lavatory and a bathtub within the same bathroom group
IPC wet venting rules permit a lavatory and bathtub within a bathroom group to share a wet vent when properly sized and configured.
The building sewer must be at a minimum horizontal distance of how many feet from a water service pipe when they are installed in the same trench?
Answer: They cannot share a trench under any condition
IPC requires that the building sewer and water service pipe maintain a horizontal separation and generally prohibits running them in the same trench unless strict separation conditions are met.
In a 10-story office building, which factor primarily determines the required diameter of the main sanitary stack?
Answer: The total drainage fixture unit load and the number of branch intervals
Stack size is determined using IPC tables based on total DFU load and the number of branch intervals the stack serves.
A combination waste-and-vent system is most appropriate in which application?
Answer: Floor drains in large open floor areas such as warehouses
Combination waste-and-vent systems are designed for floor drains and similar fixtures in large open areas where conventional venting is impractical.
What is the minimum depth of cover (burial depth) required for building sewer piping installed under a driveway subject to vehicle traffic?
Answer: 18 inches
The IPC generally requires a minimum cover of 18 inches for building sewers located under driveways to protect against vehicle load damage.