Read And Interpret Electrical Doagrams Flashcards
What is meant by the capacity rating of a lead-acid battery?
The number of hours a battery can supply a given current flow.
In what units is battery capacity expressed?
In ampere-hours.
What electrolyte is used in a lead-acid battery?
A mixture of sulfuric acid and water
Does the specific gravity of the electrolyte in a lead-acid battery increase or decrease as the battery becomes discharged?
It decreases.
What is the specific gravity of a fully charged lead-acid battery?
Between 1.275 and 1.300.
How many cells are there in a 24-volt lead-acid battery?
12
What is the range of temperatures of the electrolyte in a lead-acid battery that does not require a correction when measuring its specific gravity?
Between 70 F and 90 F.
What instrument is used to measure the specific gravity of the electrolyte in a lead-acid battery?
A hydrometer.
How do you treat a lead-acid battery compartment to protect it from corrosion?
Paint it with an asphaltic (tar-base) paint or with a polyurethane enamel.
What is used to neutralize spilled electrolyte from a lead-acid battery?
A solution of bicarbonate of soda and water.
How high should the electrolyte level be in a properly serviced lead-acid battery?
Only up to the level of the indicator in the cell.
Why is the closec-circuit voltage of a lead-acid battery lower than its open-circuit voltage?
Voltage is dropped across the internal resistance of the battery.
What is the open-circuit voltage of a lead-acid cell?
2.1 volts
What gases are released when a lead-acid battery is being charged?
Hydrogen and oxygen.
What precautions should be taken in the maintenance shop where both lead-acid and nickel-cadmium batteries are serviced?
The two types of batteries should be kept separate, and the tools used on one type should not be used on the other.
