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88L10 > [Battery Charging Systems] > Flashcards

[Battery Charging Systems] Flashcards

1
Q

What provides a means of holding the electrolyte, and is used to mount the electrodes?

A

Container

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2
Q

What is the typical charge time for a lead-acid battery?

A

8-16 hours

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3
Q

What senses the alternator’s output and increases or decreases the current to the field as necessary to maintain the proper output voltage?

A

Voltage regulator

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4
Q

What is the specific gravity range for a fully-charged battery?

A

1.260-1.280

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5
Q

How many volts per cell does a fully-charged lead-acid battery have?

A

2.33 volts per cell

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6
Q

What is a machine that converts mechanical energy into electrical energy?

A

Generator

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7
Q

How is the alternator driven?

A

By a V-belt driven by the crankshaft, with motion provided by the [DIESEL ENGINE]

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8
Q

How many diodes are in a full-wave bridge rectifier?

A

6 (3 positive/3 negative)

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9
Q

What is the specific gravity range for a fully-charged battery?

A

1.260-1.280

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10
Q

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?

A

Polarization

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11
Q

What are the three cylindrical diodes connected in parallel to the positive rectifier diodes called?

A

Field diode assembly

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12
Q

How is the capacity of a battery rated?

A

Ampere-hours

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13
Q

What is the most acceptable manner to clean battery terminals and clamps?

A

Wire-type cleaner or cutter, or straight-edge cleaner

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14
Q

What diode allows current to leave the alternator only?

A

Isolation diode

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15
Q

How many degrees apart are the three conductors (windings) in the armature?

A

120 degrees

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16
Q

What do cells connected in series provide?

A

Higher voltage

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17
Q

What is a cell?

A

A device that transforms chemical energy into electrical energy

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18
Q

What is the conversion of a cell’s chemical energy to a productive electrical energy called?

A

Electrochemical action

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19
Q

What is the solution that reacts with the electrodes, and provides a path for electron flow?

A

Electrolyte

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20
Q

Unless otherwise specified, the specific gravity readings between cells should be no greater than how many points for a fully-charged battery?

A

25 points (.025)

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21
Q

How long should you flush your skin and eyes if electrolyte is spilled or splashed on them?

A

A minimum of 15 minutes

22
Q

What is the limit beyond which very little useful energy can be obtained from a battery?

A

Low-voltage limit

23
Q

What is the specific gravity range for a discharged battery?

A

1.110-1.130

24
Q

What is a device that consumes electrical power?

A

Load

25
Q

What are the five types of charges that may be given to a storage battery?

A
  • Initial - long, low-rate charge
  • Normal - routine charge
  • Equalizing - special, extended normal charge
  • Floating (Trickle) - keep full charge while idle
  • Fast - emergency charging
26
Q

What are the positive and negative electrodes?

A
  • Anode - positive

* Cathode - negative

27
Q

What do cells connected in parallel provide?

A

Higher current capacity

28
Q

What provides a visual and authoritative point of view for battery cleanliness?

A

Leak test

29
Q

How often should you keep specific gravity in a battery logbook?

A

Weekly

30
Q

What is the ratio of the weight of the electrolyte to the weight of the same volume of pure water?

A

Specific gravity

31
Q

What are the conductors by which the current leaves or returns to the electrolyte?

A

Electrodes

32
Q

What does sulfuric acid turn anodes and cathodes into?

A

Lead sulfate

33
Q

Unless otherwise specified, the specific gravity readings between cells should be no greater than how many points for a fully-charged battery?

A

25 points (.025)

34
Q

What is the building block of all batteries?

A

Cell

35
Q

How long should you flush your skin and eyes if electrolyte is spilled or splashed on them?

A

A minimum of 15 minutes

36
Q

How can a secondary cell be restored to its original condition?

A

By forcing an electric current through it in the opposite direction of discharge

37
Q

What is electrolyte a mixture of?

A

62% water and 38% sulfuric acid

38
Q

What consists of two electrodes placed in a container that holds electrolyte?

A

Simple cell

39
Q

What is an instrument that measures the amount of active ingredients in the electrolyte of the battery? (measures the specific gravity of the electrolyte)

A

Hydrometer

40
Q

What is the item that moves a generator coil called?

A

Prime mover

41
Q

What type of cell is discarded when its chemical energy is exhausted?

A

Primary cell

42
Q

Where should you always start troubleshooting a battery-powered electrical system?

A

At the batteries

43
Q

What consists of a number of cells assembled in a common container?

A

Battery

44
Q

What are anodes and cathodes made up of?

A
  • Lead peroxide - Anodes

* Sponge lead - Cathodes

45
Q

What is a voltage source that uses chemical action to produce a voltage?

A

Battery

46
Q

What is the main concern for cleaning battery terminals?

A

To provide a large, clean contact surface area for unimpeded flow of current

47
Q

What are the conductors by which the current leaves or returns to the electrolyte?

A

Electrodes

48
Q

What type of cell can be recharged?

A

Secondary cell

49
Q

How many windings are in the alternator?

A

2

50
Q

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)

A

Field

51
Q

What causes gassing?

A

Charge rate is too high

88L10 (22 decks)

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