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Well digging 101 > Electrical > Flashcards

Electrical Flashcards

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1
Q

When measuring voltage, you need to connect the voltmeter in ____ with the circuit…

A

Parallel

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2
Q

The unit for measuring current is…

A

Amperes

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3
Q

AC and DC are short for…

A

Alternating current and Direct current

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4
Q

In order to check standing voltage at a battery, what setting should your voltmeter be on?

A

DC volts

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5
Q

True or false, when measuring current with the clamp on ammeter, you must break the circuit.

A

False, you can not measure current if there is no flow through the circuit

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6
Q

True or false, it is OK to clamp more than one wire at once when you’re measuring current.

A

False

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7
Q

Using Ohm’s law, how would one find amperage?

A

Divide voltage by resistance

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8
Q

What are the 5 components necessary to create a circuit?

A
  1. Source
  2. Circuit protection
  3. Circuit control
  4. Load
  5. Ground
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9
Q

What is a unit of resistance?

A

Ohms

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10
Q

What is an ideal level of voltage drop?

A

0.00V

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11
Q

What is an acceptable level of voltage drop?

A

100mV

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12
Q

one horsepower is equivalent to ____ watts

A

746

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13
Q

A relay is a…

A

Electrically controlled switch, uses a low voltage to control a high voltage.

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14
Q

A type of electromotive force that causes electron flow in an alternator is called

A

magnetism

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15
Q

Generally speaking, what is the difference between relays and solenoids?

A

-Relays just makes the electrical connection and have very little physical movement

-Solenoids make electrical connections and also have some physical external movement. Solenoids also tend to be more robust.

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16
Q

there are three ways to induce voltage through magnetic induction, they are:

A
  1. Generated voltage
  2. Self induction
  3. Mutual induction
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17
Q

True or false, in mutual induction, coils are placed side by side.

A

True

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18
Q

In a circuit, a switch is an example of

A

Circuit control

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19
Q

when it comes to switches, DPDT stands for…

A

Double pole, double throw

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20
Q

In the presence of excessive heat, a fuse/fuseable link will…

A

melt and break the circuit

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21
Q

If a material has exactly four electrons it is considered a

A

Semiconductor

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22
Q

A material with 5 or more electrons would be considered a

A

insulator

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23
Q

Why are insulators effective?

A

because they limit electron flow between different materials.

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24
Q

Two materials that are known semiconductors are

A

Silicon and germanium

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25
Q

Electrical pressure, potential, or potential difference all refer to…

A

voltage

26
Q

Four things that contribute to increased resistance in a circuit are…

A
  1. Corrosion
  2. Length of wire
  3. Diameter of wire
  4. Temperature
27
Q

Optimal opperating temperature for a 12V battery is…

A

80 Degrees F

28
Q

You need to calculate total resistance in a series circuit with multiple resistors, what formula do you use?

A

R1 + R2 + R3

29
Q

The rule for calculating total resistance in a parallel circuit is…

A

1 / 1/R1 + 1/R2 + 1/R3

30
Q

A common wire material is ___

A

Copper

31
Q

Electrons generally flow around the ____ of the wire

A

Outside diameter

32
Q

If a starter does not have a ground terminal it will be ground through

A

the frame

33
Q

The starter pinion and ring gear ratio is about

A

18:1 to 20:1

34
Q

The starter takes electrical energy from the ______

A

Battery

35
Q

How does an inertia drive starter drive mechanism work?

A

Rotational force by the armature moves the pinion gear into the ring gear.

36
Q

OCP stands for

A

Over crank protection

37
Q

A component that protects a starter from running for too long is called

A

OCP - over crank protection

38
Q

True or false, the alternator output is DC but the orignical source inside the alternator is AC which is converted to DC.

A

True

39
Q

Alternators are typically mounted in two configurations, they are….

A

-Pad mount

-Hinge mount

40
Q

Why do alternators need to have a higher voltage than the battery they are supplying?

A

Electrons move from areas of high concentration to areas of low concentration. If the voltages between the alternator and the battery were the same, there would be no flow.

41
Q

The two types of stator configurations are…

A

Wye and delta

42
Q

Of the two stator configurations, which is most efficient?

A

Delta, delta wound produces 40% more power.

43
Q

One main advantage that alternators have over generators is ….

A

higher current output

44
Q

True or false, in order to test voltage drop from your alternator, the machine needs to be running.

A

True

45
Q

A kilowatt of power is equivalent to _____ HP

A

1.3, the formula for calculating this is 1000/746

46
Q

How to opposite magnetic poles behave?

A

They attract

47
Q

You’re reading a schematic and encounter ‘H14Pk’ written above a wire, what does this designation mean?

A

Harness, 14 gauge wire, pink in color

48
Q

A material with less than 4 electrons is considered to be a good ________

A

Conductor

49
Q

EMF is short for…

A

Electromotive force

50
Q

The function of an insulator is to…

A

Prevent the free flow of electrons across a surface

51
Q

Within a circuit, if resistance increases

A

Voltage decreases

52
Q

Name a common type of connector

A
  • Butt connector
  • Ring terminal
  • Blade terminal
53
Q

The four terminals that you are likely to encounter on the starter are…

A

B - Battery
S - Start
M - Motor
G - Ground

54
Q

Which starter terminal may or may not always be present?

A

Ground

55
Q

What is the function of the starter solenoid?

A

It engages the starter motor to the flywheel

56
Q

What is the function of the starter motor?

A

It drives the flywheel to crank the engine

57
Q

The largest terminal on the alternator will always be…

A

the positive terminal

58
Q

Delco-Remy style alternators use ‘1’ and ‘2’ terminals which are used for…

A

1 - Indicator lamp
2 - voltage sensing

59
Q

What component of the alternator converts AC to DC?

A

Rectifier bridge

60
Q

The stator is a stationary component of the alternator, what component spins inside it?

A

Rotor

61
Q

When performing a battery test with a carbon pile, what would be considered an acceptable load to put the battery under?

A

Half of the batteries CCA rating

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