Massachusetts Unrestricted Construction Supervisor License Practice Test

What UL standards must smoke detectors in a single family dwelling conform to?

1. 217 or 268

2. 310 or 422

3. 900 or 1002

4. 780 or 800

The correct answer is: 217 or 268

Smoke detectors in a single-family dwelling must conform to UL standards 217 or 268 to ensure their reliability and effectiveness in detecting smoke and fire hazards. UL 217 specifically pertains to single and multiple station smoke alarms. It sets the performance requirements for these devices, including sensitivity to smoke and sound levels of the alarm, to ensure that they function correctly in alerting residents to potential dangers. UL 268, on the other hand, deals with smoke detectors for duct applications, providing standards for systems designed to provide an early warning of smoke within heating, ventilation, and air conditioning systems. This is important in a residential context where duct systems can influence the spread of smoke. These standards are crucial for ensuring that smoke detectors operate reliably, which is vital for the safety of the occupants in a home setting. The other options do not align with applicable UL standards pertinent to smoke detectors in residential buildings.