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PROGRESSIVE TEST 3
Terms in this set (35)
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
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
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
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 on 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 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.
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
If each cell, connected in series, equals 2 volts, how would a 12-cell lead acid battery be rated?
Primary cells cannot be charged
What is the open circuit voltage of a lead acid battery cell?
The specific gravity of a fully charged lead acid battery is?
1.275 to 1.300 @ 80 degrees F
When installing a battery, install the .. first.
When removing a battery, remove the ... first.
What is the open circuit voltage of a fully charged ni-cad cell?
1.55 to 1.80 volts
If electrolyte is spilled from a lead acid battery, neutralize it with
If electrolyte is spilled from a ni-cad battery, neutralize it with
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
The method used to rapidly charge a nickel-cadmium battery utilizes
constant voltage and varying current.
A fully charged lead-acid battery will not freeze until extremely low temperatures are reached because
most of the acid is in the solution
Which statement regarding the hydrometer reading of lead acid storage battery electrolyte is true
The hydrometer reading does not require a temperature correction if the electrolyte temperature is 80°F.
Which of the following statements is / are generally true regarding the charging of 7 Air craft batteries together
1 and 2
Which of the following logic gates will provide an active high out only when all inputs are different
What is likely the result of servicing and charging nickel cadmium 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 aircraft
To completely charge a nickel cadmium battery some gassing must take place thus some water will not be used
The end of charge voltage of a 19 cell nickel c battery 🔋 measured while still on charge
Depends upon the temperature and the method used for charging
Base is negative with respect to the emitter
Base is positive with respect to emitter
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