Quiz4 Flashcards

0
Q

What two dissimilar metals in a battery known as?

A

Electrodes

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1
Q

Define battery

A

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

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2
Q

What is the chemical solution in a battery called?

A

Electrolyte

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3
Q

What is an anode?

A

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

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4
Q

What is the cathode in the battery?

A

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

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5
Q

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

A

From the cathode to the anode

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6
Q

Three purposes of the aircraft main battery?

A

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

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7
Q

What does it mean to be a primary cell?

A

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.

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8
Q

What does it mean to be a secondary cell?

A

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

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9
Q

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

A

Dry cell, wet cell, gel cell

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10
Q

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

A

Hydrometer test
High rate discharge test
Load test

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11
Q

What does a hydrometer test indicate?

A

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

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12
Q

What does a load test determine?

A

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

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13
Q

What does a high rate discharge test determine?

A

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

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14
Q

What is the only test useful on NiCad batteries?

A

The high rate discharge test

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15
Q

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

A

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
Q

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

A

140%