Ch. 4 Review

When charging lead-acid batteries, why should you reduce the charging rate as the battery nears its full charge capacity?

• to prevent excessive gassing and overheating

• to increase lead peroxide formation

• to reduce lead sulfate deposits

• to allow equalization of cell voltages

When charging, which of the following represents the recommended maximum allowable temperature for electrolyte in a lead-acid battery?

• 110°F

• 145°F

• 165°F

• 212°F

Which of the following statements concerning nickel-cadmium batteries is true?

• Nickel-cadmium batteries should only be discharged 50% before recharging.

• When mixing electrolyte always add acid to the water.

• The state of charge cannot be determined by the specific gravity values.

• The electrolyte of an idle nickel-cadmium battery must be replaced monthly to maintain battery condition.

What should be done when correcting specific gravity readings of a lead-acid battery for existing temperature conditions?

• add 4 correction points for each 10°F the battery temperature is above 80°F

• subtract 4 correction points for each 10°F the battery temperature is above 80°F

• add 4 correction points for each 10°F the battery temperature is above 90°F

• add 10 correction points for each 4°F the battery temperature is above 80°F

When charging a 100 amp-hour lead-acid battery, what statement is true?

• insure adequate battery room ventilation

• always start with a trickle charge rate

• insure that violent gassing occurs

• insure that the electrolyte level is below the top of the plates

What is the most reliable indication of the state of charge of a lead-acid battery?

• ampere-hour capacity

• total cell voltage

• individual cell voltage

• electrolyte specific gravity

Why should a breakable, mercury-filled thermometer NOT be used in a lead-acid battery to measure electrolyte temperature?

• accidental breakage can cause corrosion on the battery terminals

• accidental breakage can cause rapid oxidation of battery plates

• accidental breakage can cause severe sparking and explosions

• accidental breakage can cause violent gassing at the positive plates