11.6

Question 1

Advantages of Ni-cd

Answer 1

• constant output
• lightweight (cost effective)

Question 2

Disadvantage of Ni cd

Answer 2

• thermal runaway

Question 3

How long must the battery run for when failed

Answer 3

30 mins

Question 4

Explain transformer rectifying unit

Answer 4

AC to DC

Question 5

Explain static invertor

Answer 5

DC to AC

Question 6

What consumes more power on a aircraft

Answer 6

• galleys

Question 7

What is a battery’s voltage

Answer 7

24V (DC)

Question 8

Aircraft DC voltage

Answer 8

28V (DC)

Question 9

Explain RAT

Answer 9

• electrical and hydraulic systems function
• rotary (AC)

Question 10

What can share electrical loads

Answer 10

Engines

Question 11

In series explain voltage and current

Answer 11

• voltage increases
• current same

Question 12

In parallel explain voltage and current

Answer 12

• voltage same
• current increases

Question 13

Explain battery venting

Answer 13

• prevents harmful vapours
• non-return valve to seal ventilation system (prevent reverse airflow)

Question 14

What type of fitting are battery connectors

Answer 14

Quick release

Question 15

Explain battery trays

Answer 15

• collect spilt electrolyte

Question 16

Where is the battery serviced

Answer 16

• battery checked outside of aircraft

Question 17

What does Ni-cd monitor when charging

Answer 17

-voltage and current

Question 18

What capacity must the battery be

Answer 18

80%

Question 19

How do you clean sulphuric acid on skin?

Answer 19

• preferably warm

Question 20

Advantages of lithium batteries

Answer 20

• deliver large amount of power in a short period of time
• recharge quicker
• weighs 30% level
• no memory degradation

Question 21

What is line/phase to neutral

Answer 21

• 115V

Question 22

What is line/phase to line/phase

Answer 22

200v