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Define battery

A device composed of two or more cells in which chemical energy is converted into electrical energy

1

What two dissimilar metals in a battery known as?

Electrodes

2

What is the chemical solution in a battery called?

Electrolyte

3

What is an anode?

The electrode which is forced to give up electrons internally and becomes positively charge

4

What is the cathode in the battery?

The electrode which is forced to receive electrons internally and becomes negatively charged

5

When a battery is connected externally through a circuit how will the electrons flow?

From the cathode to the anode

6

Three purposes of the aircraft main battery?

Ground operations including start up
Emergency voltage in flight
To absorb spikes in voltage caused by the alternator or generator

7

What does it mean to be a primary cell?

Not rechargeable, when this battery is in a discharge condition an electrochemical reaction takes place resulting in one of the metals being consumed, because of this consumption the charging process is not reversible.

8

What does it mean to be a secondary cell?

Rechargeable; a secondary cell is any mind of electrolytic cell in which the electrochemical reaction that releases energy is reversible

9

What are the three types of batteries based on the form of electrolyte?

Dry cell, wet cell, gel cell

10

Name the three tests that can be performed on a lead acid battery

Hydrometer test
High rate discharge test
Load test

11

What does a hydrometer test indicate?

Determines the state of charge by measuring the specific gravity of the electrolyte

12

What does a load test determine?

Determines the state of charge by measuring the closed cell voltage of the battery

13

What does a high rate discharge test determine?

It determines the capacity of the battery by seeing how long it takes to become discharged

14

What is the only test useful on NiCad batteries?

The high rate discharge test

15

When removing a battery from an aircraft; which terminal should be removed first?

The negative terminal. If you remove the negative terminal and accidentally complete the circuit to ground there will be no current flow. This prevents dangerous situations caused by shorts.

16

What is the charge desired for a NiCad amp hour rating?

140%