[Battery Charging Systems] Flashcards
What provides a means of holding the electrolyte, and is used to mount the electrodes?
Container
What is the typical charge time for a lead-acid battery?
8-16 hours
What senses the alternator’s output and increases or decreases the current to the field as necessary to maintain the proper output voltage?
Voltage regulator
What is the specific gravity range for a fully-charged battery?
1.260-1.280
How many volts per cell does a fully-charged lead-acid battery have?
2.33 volts per cell
What is a machine that converts mechanical energy into electrical energy?
Generator
How is the alternator driven?
By a V-belt driven by the crankshaft, with motion provided by the [DIESEL ENGINE]
How many diodes are in a full-wave bridge rectifier?
6 (3 positive/3 negative)
What is the specific gravity range for a fully-charged battery?
1.260-1.280
What is the chemical action that occurs in the cell while the current is flowing that causes hydrogen bubbles to form on the surface of the anode?
Polarization
What are the three cylindrical diodes connected in parallel to the positive rectifier diodes called?
Field diode assembly
How is the capacity of a battery rated?
Ampere-hours
What is the most acceptable manner to clean battery terminals and clamps?
Wire-type cleaner or cutter, or straight-edge cleaner
What diode allows current to leave the alternator only?
Isolation diode
How many degrees apart are the three conductors (windings) in the armature?
120 degrees
What do cells connected in series provide?
Higher voltage
What is a cell?
A device that transforms chemical energy into electrical energy
What is the conversion of a cell’s chemical energy to a productive electrical energy called?
Electrochemical action
What is the solution that reacts with the electrodes, and provides a path for electron flow?
Electrolyte
Unless otherwise specified, the specific gravity readings between cells should be no greater than how many points for a fully-charged battery?
25 points (.025)
How long should you flush your skin and eyes if electrolyte is spilled or splashed on them?
A minimum of 15 minutes
What is the limit beyond which very little useful energy can be obtained from a battery?
Low-voltage limit
What is the specific gravity range for a discharged battery?
1.110-1.130
What is a device that consumes electrical power?
Load
What are the five types of charges that may be given to a storage battery?
- Initial - long, low-rate charge
- Normal - routine charge
- Equalizing - special, extended normal charge
- Floating (Trickle) - keep full charge while idle
- Fast - emergency charging
What are the positive and negative electrodes?
- Anode - positive
* Cathode - negative
What do cells connected in parallel provide?
Higher current capacity
What provides a visual and authoritative point of view for battery cleanliness?
Leak test
How often should you keep specific gravity in a battery logbook?
Weekly
What is the ratio of the weight of the electrolyte to the weight of the same volume of pure water?
Specific gravity
What are the conductors by which the current leaves or returns to the electrolyte?
Electrodes
What does sulfuric acid turn anodes and cathodes into?
Lead sulfate
Unless otherwise specified, the specific gravity readings between cells should be no greater than how many points for a fully-charged battery?
25 points (.025)
What is the building block of all batteries?
Cell
How long should you flush your skin and eyes if electrolyte is spilled or splashed on them?
A minimum of 15 minutes
How can a secondary cell be restored to its original condition?
By forcing an electric current through it in the opposite direction of discharge
What is electrolyte a mixture of?
62% water and 38% sulfuric acid
What consists of two electrodes placed in a container that holds electrolyte?
Simple cell
What is an instrument that measures the amount of active ingredients in the electrolyte of the battery? (measures the specific gravity of the electrolyte)
Hydrometer
What is the item that moves a generator coil called?
Prime mover
What type of cell is discarded when its chemical energy is exhausted?
Primary cell
Where should you always start troubleshooting a battery-powered electrical system?
At the batteries
What consists of a number of cells assembled in a common container?
Battery
What are anodes and cathodes made up of?
- Lead peroxide - Anodes
* Sponge lead - Cathodes
What is a voltage source that uses chemical action to produce a voltage?
Battery
What is the main concern for cleaning battery terminals?
To provide a large, clean contact surface area for unimpeded flow of current
What are the conductors by which the current leaves or returns to the electrolyte?
Electrodes
What type of cell can be recharged?
Secondary cell
How many windings are in the alternator?
2
What type of alternator do Army vessels use?
there was another question on this test that the answer was also the same as this one (it said something about “what is a term we use to identify the alternator that we use” or something)
Field
What causes gassing?
Charge rate is too high
