Which of the following statements about smoke alarms is true?

The statement that smoke alarms should be tested monthly is a critical guideline for ensuring that these safety devices function properly. Regular testing helps to identify whether the smoke alarm is working effectively and can detect smoke in case of a fire. Monthly tests ensure that the alarm's battery is functioning and that the unit is free from obstructions and dust that could affect its performance.

It's important to maintain the reliability of smoke alarms, as they play a crucial role in fire safety by providing early warning in case of smoke or fire, thus allowing individuals to respond quickly. While it's true that smoke alarms should be replaced periodically and that they may not be necessary in every room depending on local regulations and safety recommendations, monthly testing remains the key practice for ensuring their operational readiness.