Exam 5: Automotive Batteriesbattery Diagnosis and Service

Technician A says the best way to charge the HV battery by allowing the engine to run. Technician B says usually an on-board jump assist method is available to start the engine if the HV battery SOC is too low. Who is correct?

At the conclusion of a three-minute charge test, the voltage reading for a satisfactory 12-volt battery should not exceed how many volts?

Which of the following statements about battery ratings is true?

What safety precautions should be taken when working with a battery?

Charging batteries can produce hydrogen and oxygen gasses.

A battery must be fully charged before testing with a conductance tester.

What type of energy conversion occurs when a battery is discharging?

At 80ºF, what is the correct specific gravity of electrolyte in a fully charged battery?

What is the principle cause of battery water loss?

The electrolyte solution consists of 64% water and 36% sulfuric acid by weight.

How much of a change in specific gravity readings does temperature compensation involve for every 10 degrees?

The reserve-capacity rating is determined by the length of time, in minutes, that a fully charged battery can be discharged at ____ amps before battery voltage drops below 10.5 volts.

What advantages does a maintenance-free battery have over a conventional battery?

The battery of a vehicle has "died" three days in a row. Each day the customer was able to start the car after he charged the battery. He was then able to drive the car 150 miles, but the next morning the battery was again discharged. A battery current drain test revealed a 10 mA drain. Technician A says the current drain is excessive and it could be the source of the problem. Technician B says that further testing is required, but it is possible that the battery may need to be replaced. Who is correct?

Sulfating is increased if a battery is left in a discharged state for extended periods of time.

If allowed to accumulate, dirt and grease on the top of the battery can form a ____ between the battery terminals.

An open circuit voltage in the 12.6-volt range indicates an overcharged battery.

What effect does corrosion on the battery terminals have on the battery output?

Why should specific gravity readings be temperature compensated?

Having to add water to a low-maintenance battery can be an indication of a higher-than-specified charging voltage.