Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A&P General Oral Practice Questions > Basic Electricity > Flashcards

Basic Electricity Flashcards

1
Q
  1. What is the most important law applicable to the study of electricity?
A

Ohm’s Law (E=I x R)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q
  1. What are the elements of Ohm’s Law?
A

Voltage(E), Current(I), Resistance(R)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q
  1. What are the four sources of electrical energy?
A

Thermal, light, pressure, and chemical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q
  1. What does an electrical circuit consist of?
A

Source (battery)
Resistance or load (light bulb)
Conductors (wire)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q
  1. What represents capacitance in an AC circuit?
A

A capacitor (same as a condenser)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q
  1. What is the function of a capacitor?
A

To store electricity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q
  1. What is the unit of measure for capacitance?
A

Farad

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q
  1. What is the standard unit of measure for frequency?
A

Hertz

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  1. What is the basic component that only allows current to flow in one direction?
A

Diode (acts like a check valve)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
  1. What is inductance?
A

Voltage induced by magnetic flux lines in a coil in an AC circuit.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q
  1. What is an example of an inductor in a magneto?
A

The coil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
  1. What is impedance?
A

Total opposition for AC to flow due to

resistance,
inductive reaction,
capacitive reactance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q
  1. What causes opposition to the flow of current in an AC circuit?
A

Inductive & capacitance reactance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
  1. What is the unit of measurement for impedance?
A

Ohms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
  1. What is the general purpose of a resistor?
A

To limit current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
  1. How may the value of a small, fixed resistor be determined?
A

By the color bands on the resistor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q
  1. What are two things that happen when current flows through a conductor?
A

A magnetic field is generated, and the conductor heats up

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q
  1. What is the common name for the lines of force that make up a filed surrounding a magnet?
A

Magnetic flux lines

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q
  1. What is the concept that describes the relationship between electricity and magnetism?
A

Electromagnetism

20
Q
  1. What are the four factors that affect the resistance of an electrical conductor?
A

wire gauge,
length,
temperature,
material

21
Q
  1. What is the unit of measurement of power in a DC circuit?
A

Watt

22
Q
  1. What is a kilowatt?
A

1,000 watts

23
Q
  1. In a DC circuit, what occurs when voltage is increased while resistance remains constant?
A

increase in current

24
Q
  1. What are the three types of DC electrical circuits?
A

Series
Parallel
Complex (series & parallel)

25
Q
  1. A 24-volt lead-acid batter has how many cells?
A

12 cells, each are 2 volts

26
Q
  1. What are the units that a battery capacity is measure in?
A

Ampere-hours

27
Q
  1. What should be the specific gravity of the electrolyte in a fully charged lead acid battery?
A

Between 1.275 - 1.300

28
Q
  1. What instrument is used to determine the specific gravity of electrolyte in a lead acid battery?
A

a hydrometer

29
Q
  1. Why can a hydrometer NOT be used to determine the charge of a nickel-cadmium battery?
A

Specific gravity of the electrolyte in a nickel-cadmium battery does not change during charge or discharge.

30
Q
  1. When using a hydrometer to check the charge of a lead-acid battery, at what temperatures must a correction factor be applied to the reading?
A

Adjustments must be made if temperature of the electrolyte is above 90 or below 70 degrees F

31
Q
  1. What is electromagnetic induction?
A

the transfer of electrical energy by means of a magnetic field (lines of flux).

32
Q
  1. How are battery compartments protected against corrosion?
A

They are coated with special corrosion resistant paint

33
Q
  1. What should be the correct electrolyte level in a properly serviced battery?
A

approx. 3/8 inches above the plates

34
Q
  1. What are paralleling generators and how is the load distributed?
A

two or more generators supply power for a load that must be shared equally.

35
Q
  1. Describe a no-trip circuit breaker (trip free).
A

A “trip free” breaker makes it impossible to manually hold the circuit closed when excessive current is flowing. (It pops when circuit gets hot and can’t be reset until it has cooled off).

36
Q
  1. Can you store Ni-cad and lead-acid batteries together?
A

No, fumes from the lead-acid battery can contaminate the Ni-cad battery.

37
Q
  1. What is the result of an imbalanced cell in a nickel-cadmium battery?
A

current will increase across the cell, causing it to heat up.

38
Q
  1. What happens to the specific gravity of the electrolyte in a lead-acid battery when temperature changes?
A

specific gravity will vary with temperature variations.

39
Q
  1. What is a L.E.D.?
A

Light Emitting Diode

40
Q
  1. What is S.L.A. Battery?
A

Sealed Lead Acid Battery

41
Q
  1. What is the basic unit of measure for inductance?
A

Henry

42
Q
  1. What prevents reverse current flow in a DC Alternator?
A

Reverse current cutout

43
Q
  1. How many wires may be a installed on a single terminal lug?
A

Four

44
Q
  1. How do you identify wire types?
A

Lettering in the insulation

45
Q
  1. Name some functions of a multimeter
A

Voltage(volts)
Current(amps)
Resistance(ohms)

46
Q
  1. Name two types of resistors.
A

Variable & fixed

A&P General Oral Practice Questions (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions