E Batteries

Question 1

In the event of an emergency, how long must a battery provide power for?

Answer 1

Minimum of 30 minutes

Question 2

4 types of batteries

Answer 2

1. Lead acid
2. Nickel-Cadmium (Ni-Cad or Ni-Cd)
3. Lithium-Ion
4. Lithium-Polymer

Question 3

Typical cell voltage of a lead acid battery

Answer 3

2.2 volts

Question 4

Typical cell voltage of a NiCad/Li-On battery

Answer 4

1.3 volts

Question 5

How is battery capacity expressed?

Answer 5

Ampere hours = amps x hours

Question 6

What is thermal runaway?

Answer 6

Rising temperature reduces resistance which increases current, a self perpetuating loop

Question 7

How would you extinguish a battery fire?

Answer 7

Depressurise the aircraft, halon extinguisher or full immersion in water

Question 8

How would you extinguish a passengers electronic device?

Answer 8

Place into a fire resistant bag and place into a galley oven for the duration of the flight

Question 9

What is the result of batteries in series?

Answer 9

Current is the same, voltage is added up

Question 10

What is the result of batteries in parallel?

Answer 10

Voltage is the same, current is added up