Batteries

Which of the following statements is/are generally true regarding the charging of several aircraft batteries together?

- Batteries of different voltage but similar capacities can be connected in series with each other across the charger, and charged using the constant current method. - Batteries of different ampere- hour capacity and same bolted can be connected in parallel with each other across the charger, and charge using the constant voltage method

A lead acid battery with 12 cells connected in series (no-load voltage =2.1 V per cell) furnishes 10 amps to a load of 2 Ω resistance. The internal resistance of the battery in this instance is

0.52 Ω

The electrolyte of a nickel cadmium battery is highest when the battery is

In a fully charged condition

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

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

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

Contamination of both types of batteries

Nickel cadmium battery cases and drain surfaces which have been affected by electrolyte should be neutralized with a solution of

Boric acid

How can the state of charge of a nickel cadmium battery be determined?

By a measured discharge

In nickel cadmium batteries, a raise in a cell temperature

Causes a decrease in internal resistance

The message used to rapidly charge a nickel cadmium battery utilizes

Constant voltage and varying current

The end of charge voltage of a 19 sell nickel cadmium battery, measured while still on charge,

Depends upon its temperature and the method used for charging.

What may result if water is added to a nickel cadmium battery when it is not fully charged?

Excessive spewing is likely to occur during the charging cycle

Which condition is an indication of improperly toward cell link connection of a nickel cadmium battery?

Heat or burn marks on the hardware

Which of the following best describes it contributing factors to thermal runaway in a nickel cadmium battery installed in an aircraft?

Low internal resistance intensified by high cell temperatures and a high current discharge/charge rate in a constant potential charging system

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

Most of the acid is in the solution

The presence of small amounts of potassium carbonate deposits on the top of nickel Canyon battery cells and have been in service for a time is indication of

Normal operation

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

Prevent sediment build-up from contacting the plates and causing a short circuit

Which statement regarding the hydro meter reading of a lead acid storage battery electrolyte is true? A. The hydro meter reading does not require a temperature correction if the electrolyte temperature is 80ﾟF B. A specific gravity correction should be subtracted from the hydro meter reading if the electrolyte temperature is above 20ﾟF C. The hydro meter reading will give a true indication of the capacity of the battery regard less of the electrolyte temperature

The hydro meter reading does not require a temperature correction if the electrolyte temperature is 80ﾟF

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

The state of charge of the battery

When a charging current is apply to a nickel cadmium battery, the cells emit gas

Toward the end of the charging cycle