Exam 17: Batteries: Theory, Diagnosis, and Service

Gassing is the conversion of the battery water into helium and nitrogen gas.

Technician A says the reserve capacity rating of a battery is the amount of steady current that a fully charged battery can supply for 20 hours without the voltage dropping below 10.5 volts. Technician B says an ampere-hour rating states how many hours the battery is capable of supplying 25 amperes. Who is correct?

Technician A uses a solution of baking soda and water to clean a battery. Technician B uses soap and water. Who is correct?

On a top post battery the positive terminal is slightly larger than the negative.

What causes gassing in a battery?

A constant current type battery charger increases or decreases voltage to maintain a constant current flow while charging.

How many volts are present in a fully charged 12-volt battery?

Battery overcharging may be caused by _____.

Technician A says electrolyte is very corrosive. Technician B says electrolyte is a water and hydrochloric acid solution. Who is correct?

The BCI group number is normally located on the outside of the battery and is used to state the physical size (height, width, and depth)of the battery.

The best way to test battery cables and terminal for excessive resistance is by _____ testing.

Battery sulfation is normally caused by ____________________.

Consult the manufacturer's ____________________ for procedures and precautions when jump-starting late model vehicles with electronic control systems.

Technician A says overcharging can overheat and damage the battery. Technician B says overcharging causes gassing that can cause the battery to lose water. Who is correct?

Identify five lead acid battery design types.

The specific gravity of the electrolyte decreases as the battery is discharged.

What are the functions of the metal box that surrounds the high-voltage batteries in a hybrid vehicle?

Lithium-ion batteries are the safest type of battery to use in a hybrid vehicle because lithium is not reactive or explosive.

In a VRLA (valve-regulated lead-acid)type battery, the _____.

____________________ are chemical solutions that react with the metals used to construct the battery plates. This chemical reaction produces an electric voltage between the plates.