1.   Alarms sound if gas supplies break down, and automatically connect reserve tanks.

2.   An alarm sounds a warning before the system breaks down.

3.   But video films of fires carried out on the test rig suggest that alarms will sound too late.

4.   If some one punches in the wrong code more than three times, the alarm sounds automatically.

5.   This alarm sounds like a gigantic pencil-sharpener grinding up something awful.

6.   When the alarm sounded, the whole gang took flight.

7.   If temperatures rise too high or machine speeds fall too low, an alarm sounds a warning before the system breaks down.

8.   There were practical aspects, too, including plant tours, showing where the exits were, what the alarms sounded like.