Extra Club 66 Q Flashcards
(15 cards)
A 12v lead-acid battery has how many cells?
6
Two batteries, 12v, 40Ah, are in series. What is their total capacity?
24v, 40Ah
Batteries in series - voltage increases but capacity remains
Batteries in parallel - voltage same but capacity increases
What is an ammeter used for in charing a battery system?
To measure the rate of current used to charge the battery
What type of cell is rechargeable?
A secondary cell
Thermal runaway causes…?
Violent gassing, boiling of the electrolyte and melting of plates and casing
Polarization reduces output voltage because of…?
The buildup of hydrogen on the cathode
In electrolytes, the charge carries are?
Ions
When connecting a battery to the aircraft, which terminal should you connect first?
The positive
If a nicad battery is not to be used soon, it should be stored in what state of charge?
Fully dissipated
The internal resistance of a battery on load, compared to on load is…?
The same. It remains constant
What is the voltage of a fully charged 24v, 12 cell lead acid battery?
25.2v-26.4v
2.2v per cell in lead acid
An aircraft battery charger normally charges a battery with?
Either constant current OR constant voltage
In cold weather, to prevent the electrolyte freezing, a battery must be kept in what stage of charge?
Fully charged
The level of electrolyte in a nicad battery would rise if the battery is…?
Charging.
