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Well digging 101 > Electrical > Flashcards

Electrical Flashcards

(61 cards)

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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
Electrical pressure, potential, or potential difference all refer to...
voltage
26
Four things that contribute to increased resistance in a circuit are...
1. Corrosion 2. Length of wire 3. Diameter of wire 4. Temperature
27
Optimal opperating temperature for a 12V battery is...
80 Degrees F
28
You need to calculate total resistance in a series circuit with multiple resistors, what formula do you use?
R1 + R2 + R3
29
The rule for calculating total resistance in a parallel circuit is...
1 / 1/R1 + 1/R2 + 1/R3
30
A common wire material is ___
Copper
31
Electrons generally flow around the ____ of the wire
Outside diameter
32
If a starter does not have a ground terminal it will be ground through
the frame
33
The starter pinion and ring gear ratio is about
18:1 to 20:1
34
The starter takes electrical energy from the ______
Battery
35
How does an inertia drive starter drive mechanism work?
Rotational force by the armature moves the pinion gear into the ring gear.
36
OCP stands for
Over crank protection
37
A component that protects a starter from running for too long is called
OCP - over crank protection
38
True or false, the alternator output is DC but the orignical source inside the alternator is AC which is converted to DC.
True
39
Alternators are typically mounted in two configurations, they are....
-Pad mount -Hinge mount
40
Why do alternators need to have a higher voltage than the battery they are supplying?
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
The two types of stator configurations are...
Wye and delta
42
Of the two stator configurations, which is most efficient?
Delta, delta wound produces 40% more power.
43
One main advantage that alternators have over generators is ....
higher current output
44
True or false, in order to test voltage drop from your alternator, the machine needs to be running.
True
45
A kilowatt of power is equivalent to _____ HP
1.3, the formula for calculating this is 1000/746
46
How to opposite magnetic poles behave?
They attract
47
You're reading a schematic and encounter 'H14Pk' written above a wire, what does this designation mean?
Harness, 14 gauge wire, pink in color
48
A material with less than 4 electrons is considered to be a good ________
Conductor
49
EMF is short for...
Electromotive force
50
The function of an insulator is to...
Prevent the free flow of electrons across a surface
51
Within a circuit, if resistance increases
Voltage decreases
52
Name a common type of connector
- Butt connector - Ring terminal - Blade terminal
53
The four terminals that you are likely to encounter on the starter are...
B - Battery S - Start M - Motor G - Ground
54
Which starter terminal may or may not always be present?
Ground
55
What is the function of the starter solenoid?
It engages the starter motor to the flywheel
56
What is the function of the starter motor?
It drives the flywheel to crank the engine
57
The largest terminal on the alternator will always be...
the positive terminal
58
Delco-Remy style alternators use '1' and '2' terminals which are used for...
1 - Indicator lamp 2 - voltage sensing
59
What component of the alternator converts AC to DC?
Rectifier bridge
60
The stator is a stationary component of the alternator, what component spins inside it?
Rotor
61
When performing a battery test with a carbon pile, what would be considered an acceptable load to put the battery under?
Half of the batteries CCA rating

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