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four 300

AMTP 300 - 4 (Batteries)

QuestionAnswer
If each cell, connected in series, equals 2 volts, how would a 12-cell lead acid battery be rated? 24 volts.
A lead-acid battery with 12 cells connected in series (no-load voltage = 2.1 volts per cell) furnishes 10 amperes to a load of 2-ohms resistance. The internal resistance of the battery in this instance is 0.52 ohm.
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.
Hydrometer reading of a lead acid storage battery electrolyte is The hydrometer reading does not require a temperature correction if the electrolyte temperature is 80°F.
A fully charged lead-acid battery will not freeze until extremely low temperatures are reached because Most of the acid is in the solution.
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.
Batteries of different voltages (but similar capacities) can be connected in series with each other across the charger, and charged using the constant current method. TRUE
Batteries of different ampere-hour capacity and same voltage can be connected in parallel with each other across the charger, and charged using the constant voltage method. TRUE
Batteries of the same voltage and same ampere-hour capacity must be connected in series with each other across the charger, and charged using the constant current method. FALSE
The method used to rapidly charge a nickel-cadmium battery utilizes constant voltage and varying current.
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.
Which condition is an indication of improperly torqued cell link connections of a nickel-cadmium battery? 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.
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.
Which of the following best describes the operating principal in a nickel-cadmium battery installed in an aircraft? To completely charge a nickel-cadmium battery, some gassing must take place; thus, some water will be used.
The electrolyte of a nickel-cadmium battery is the lowest when the battery is in a discharged condition.
The electrolyte of a nickel cadmium battery is highest when the battery is in a fully charged condition.
The end-of-charge voltage of a 19-cell nickel-cadmium battery, measured while still on charge, depends upon its temperature and the method used for charging.
Nickel-cadmium batteries which are stored for a long period of time will show a low liquid level because electrolyte becomes absorbed into the plates.
How can the state-of-charge of a nickel-cadmium battery be determined? By a measured discharge.
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.
In nickel-cadmium batteries, a rise in cell temperature causes a decrease in internal resistance.
Which of the following is most likely to cause thermal runaway in a nickel-cadmium battery? Excessive current is drawn from the battery.
An ammeter in a battery charging system is for the purpose of indicating the rate of current used to charge the battery.
What precaution is usually taken to prevent electrolyte from freezing in a lead acid battery? Keep the battery fully charged.
What is the ampere-hour rating of a storage battery that is designed to deliver 45 amperes for 112.5 ampere-hour.
How many hours will a 140 ampere-hour battery deliver 15 amperes? 9.33 hours.
The constant current method of charging a ni-cad battery is the method most effective in maintaining cell balance.
Which of the following best describes the 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 (voltage) charging system.
When a charging current is applied to a nickel cadmium battery, the cells emit gas toward the end of the charging cycle.
Nickel-cadmium battery cases and drain surfaces which have been affected by electrolyte should be neutralized with a solution of boric acid.
Created by: amtp
 

 



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