Fire And Smoke Protection And Detection

Question 1

What are the two types of smoke detector?

Answer 1

Optical and ionising

Question 2

How does an optical smoke detector work?

Answer 2

Uses a light source which will only be received by the detector if refracted through smoke

Question 3

How does an ionising smoke detector work?

Answer 3

Relies on a current flowing through radioactively ionised air, when smoke is present the current cannot be conducted any more

Question 4

How is fire detected around the engines and nacelles?

Answer 4

Fire wires, these change resistance and capacitance when heated or rely on an increase in temperature to expand gases, which is sense by and aneroid capsule