1. T 
> Smoke alarms are now a standard feature in Australian homes and are required by the National Building Code in any recently built properties. 
2. F
> Ionization alarms are the cheapest and most readily available smoke alarms. 
3. NG
4. T
> For the installation of hard-wired smoke alarms, powered from the mains electricity supply, however, you will need the services of a licensed professional. 
5. NG
6. F
> Your battery-powered smoke alarm will produce a short beep every 60 second to alert you when the battery is running out and needs replacing.
7. F
> it should be tested every month to ensure that the battery and the alarm sounder are working.