FAA General-Battery

If electrolyte from a lead-acid battery is spilled in the battery compartment, which procedure should be followed?

• Apply boric acid solution to the affected area followed by a water rinse.

• Rinse the affected area thoroughly with clean water.

• Apply sodium bicarbonate solution to the affected area followed by a water rinse.

Which statement regarding the hydrometer reading of a lead-acid storage battery electrolyte is true?

• The hydrometer reading does not require a temperature correction if the electrolyte temperature is 80°F.

• A specific gravity correction should be added to the hydrometer reading if the electrolyte temperature is below 59°F.

• The hydrometer reading will give a true indication of the capacity of the battery regardless of the electrolyte temperature.

A fully charged lead-acid battery will not freeze until extremely low temperatures are reached because

• the acid is in the plates, thereby increasing the specific gravity of the solution.

• most of the acid is in the solution.

• increased internal resistance generates sufficient heat to prevent freezing.

Tags

NGSS.HS-PS3-4

What determines the amount of current which will flow through a battery while it is being charged by a constant voltage source?

• The total plate area of the battery.

• The state-of-charge of the battery.

• The ampere-hour capacity of the battery.

The method used to rapidly charge a nickel-cadmium battery utilizes

• constant current and constant voltage.

• constant current and varying voltage.

• constant voltage and varying current.

Tags

NGSS.HS-PS2-5

The purpose of providing a space underneath the plates in a lead-acid battery’s cell container is to

• prevent sediment buildup from contacting the plates and causing a short circuit.

• allow for convection of the electrolyte in order to provide for cooling of the plates.

• ensure that the electrolyte quantity ratio to the number of plates and plate area is adequate.

Which condition is an indication of improperly torqued cell link connections of a nickel-cadmium battery?

• Light spewing at the cell caps.

• Toxic and corrosive deposits of potassium carbonate crystals.

• Heat or burn marks on the hardware.

The presence of any small amount of potassium carbonate deposits on the top of nickel-cadmium battery cells in service is an indication of

• normal operation.

• excessive gassing.

• plate sulfation.

What is the likely result, if any, of servicing and charging nickel-cadmium and lead-acid batteries together in the same service area?

• The electrolytes in each battery are the same, so there are no significant differences.

• The nickel-cadmium would not be affected, but the lead-acid battery could become contaminated.

• Contamination of both types of batteries would occur.

Which of the following best describes the operating principle in a nickel-cadmium battery installed in an aircraft?

• At full charge, the electrolyte will be at its lowest level and should be filled.

• To completely charge a nickel-cadmium battery, some gassing must take place; thus, some water will be used.

• When positive plates slowly give up oxygen, which is regained by the negative plates, the battery is charging.