Worksheet 43-Battery Maintenance Flashcards
For a charged lead acid battery, what is the ratio of water to acid?
A lead acid battery is 70% water and 30% sulfuric acid by weight.
For a lead acid battery, what is added to the lead material and why?
For lead acid battery plates, antimony is added to harden the plates.
In an aviation battery, how are vent caps different than automotive units?
Aviation battery vent caps are self-sealing when tipped to prevent spillage.
What causes plate shorting in a lead acid battery as it ages?
As lead acid batteries charge and discharged, they lose some of the lead material into the solution that can short out the cells.
When disconnecting a battery from an aircraft, which cable is disconnected first?
When removing a battery from an aircraft, it is important to remove the negative cable first.
For a lead acid battery, what is the tool used to indicate the state of charge of the electrolyte?
Use a hydrometer to test the state of charge of a lead-acid battery
What are two types of battery chargers available to technicians?
Constant-current and constant-voltage
Which one of the chargers in the previous question should never be connected to an aircraft?
A constant-current charger should not be connected to an actual aircraft because of temperature and venting issues.
