FREE ICC Mechanical, Plumbing, and Electrical Code Professionals Questions and Answers
What type of pipe is typically required for gas supply lines in a building?
Black steel pipes are commonly used for gas supply lines due to their strength and ability to handle gas pressures safely. PVC and copper are not generally approved for gas piping because they may not withstand the pressures or potential corrosive properties of gas.
What is the minimum slope required for horizontal drainage pipes in a plumbing system according to the International Plumbing Code (IPC)?
The IPC specifies that horizontal drainage pipes should have a minimum slope of 1/4 inch per foot to ensure adequate flow and prevent blockages. This slope allows wastewater to drain efficiently without causing backflow issues.
According to the International Mechanical Code (IMC), what is the minimum clearance required for combustible materials around a furnace?
The IMC requires a minimum clearance of 3 inches around combustible materials for most furnaces. This helps prevent fires and ensures safe operation of the heating equipment.
In electrical systems, what does the term "ampacity" refer to?
Ampacity refers to the maximum amount of electric current a conductor or device can handle before it risks overheating. This rating is essential for preventing fires and ensuring the electrical system operates within safe limits.
Which of the following materials is commonly used for supply piping in residential plumbing due to its durability and corrosion resistance?
Copper is widely used in residential plumbing systems for its durability, resistance to corrosion, and ability to handle both hot and cold water. PVC is used mainly for drain pipes, while cast iron and lead have limited applications due to weight and health concerns.