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Basic Electricity

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Bare - covered - insulated - stranded - cable(All of the above)
Purging
Use an effect to produce another effect
Volts

2. What does a moving charge produce?
A difference in potential energy
Moving vehicles
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
A magnetic field

3. What is a common form used in conductors?
Heat
From the negative battery terminal to the positive terminal
Magnetic properties
Cables

4. Which of the following materials is NOT a good conductor?
Porcelain
Voltmeter
Area and spacing of capacitor - static current in the capacitor(both A and B)
Ohms

5. What is power?
Volts
Electromagnetism
Start with the band on the end and read to the center
The rate of doing work

6. What results when current is run through a material with high resistance?
1/1000th of an inch
Battery
Magnetic properties
Heat and current control(both a and c)

7. What is the term for doing work at the rate of joule per second?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Potential difference
1 watt
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

8. How many kinds of poles do magnets have?
Two
The rate of doing work
Relationship between current and potential difference
First digit

9. What is the fundamental property of insulators?
The rate of doing work
Insulation resistance and Dielectric strength(Both A and B)
Parallel circuit
Resistance increases as the conductor length increases

10. What is the relationship between cells and batteries?
Ohms
Stranded
Heat
Cells can be connected together to make a battery

11. What determines whether a spark can be produced?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Strength of the charge
--^V^V^V^---
Resistance increases as the conductor length increases

12. What do we call the ability to do work?
Energy
Ability to store an electric charge
Battery
Heat

13. What is an electromagnet?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Opposes any change in the current flowing in a circuit
Choke
Symbol

14. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10%
1/1000th of an inch
Symbol
Common - not rechargable - gradually discharges when in storage(All of the above)

15. What is a property of inductors in electrical circuits?
Energy
Opposes any change in the current flowing in a circuit
The direction the negative charge moves
Porcelain

16. How do you read resistor color codes?
Moving vehicles
Start with the band on the end and read to the center
American wire gauge(AWG)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

17. What does a first band of white mean?
First digit is 9
Start with the band on the end and read to the center
Magnetism produces a field and the field exerts force on a moving charge - every moving electrical charge produces a magnetic field - and the magnetic field is strong when the electrical charge is strong and moves rapidly(all of the above are true)
Volts

18. What is the use of the electromagnet?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
15 -000 ohms - 20%
Tolerence
From the negative battery terminal to the positive terminal

19. What does Ohm's Law represent?
Porcelain
Relationship between current and potential difference
Heat
DC flows continuously in one direction and AC potential difference and current both change direction

20. Where does the thumb point in both Left-Hand Rules?
Bonding and grounding
First digit is 9
Insulation resistance
The direction the negative charge moves

21. What cannot be transformed to higher or lower potential differences?
Fixed - tapped - variable(all of the above)
10
DC current
Alternating current

22. What is a rigid metal conduit?
Volts
First digit is 9
Composition of the resistor
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

23. How do static charges distribute themselves?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Bonding and grounding
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
15 -000 ohms - 20%

24. What is a common cause of static electricity in a shop?
5%
Symbol
Moving vehicles
Tolerence

25. What is induction?
Current change in a coil creates a magnetic change
Amperes
Relationship between current and potential difference
High resistance

26. In most applications - what remains constant if the current remains constant and flows in one direction?
Breakdown voltage
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Electromagnetic field
Mutual induction

27. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
A magnetic field
Series circuit
Electrical resistance against the flow of current
Parallel

28. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Relay
Start with the band on the end and read to the center
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

29. Why is the transformer important to AC electricity?

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30. What is an arrangement of materials that create a potential difference by chemistry?
Alternating current
Parallel
Resistance increases as the conductor length increases
Cell

31. What is the unit of measurement of potential difference?
Volts
Plastic - Rubber - Friction(all of the above)
Does not move
Unlike poles attract

32. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Mutual induction
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

33. Identify the blueprint symbol for resistors.
Porcelain
Insulation resistance and Dielectric strength(Both A and B)
--^V^V^V^---
Potential difference - E*I - current times current change from point to point(all of the above)

34. What do electrical charges need to cause a fire or explosion?
Series circuit
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Volts
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

35. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Volts
Silver
DC flows continuously in one direction and AC potential difference and current both change direction
20%

36. What makes electrons flow?
Electromagnetism
Potential difference
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Cables

37. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Volts
Grounding wire

38. What is the name for electrical resistance of insulation?
Use an effect to produce another effect
Opposes any change in the current flowing in a circuit
Insulation resistance
10

39. What does static electricity do?
Secondary cell
Current flows in one direction - potential differences across a load does not change(Both A and B)
From the negative battery terminal to the positive terminal
Does not move

40. What is the relationship of conductor size and length to resistance?
DC flows continuously in one direction and AC potential difference and current both change direction
Tolerence
The rate of doing work
Resistance increases as the conductor length increases

41. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Amperes
American wire gauge(AWG)
Alternating current
Relationship between current and potential difference

42. What determines the resistance of a resistor?
Two
Wire splices
Composition of the resistor
75 Ohms

43. What is a common measure of wire diameter?
Gauge number
Current flows in one direction - potential differences across a load does not change(Both A and B)
Cell
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

44. What is a switch that operates by electricity?
Secondary cell
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Relay
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

45. What is the type of cable composed of many fine wires?
A magnetic field
Stranded
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Insulation resistance and Dielectric strength(Both A and B)

46. What are the common units of measurement for round and square conductor cross - sections?
Battery
Volts
A difference in potential energy
Circular and square mills(Both A and B)

47. What are the names of two of the six primary methods of producing a voltage?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Cables
Produce heat - light - or limit current to control it(all of the above)
Magnetic properties

48. What must be large enough to carry the largest current likely to occur?
10
Silver
Grounding wire
Insulation resistance

49. Given E=I X R and the following information - plug in the data and solve the problem for voltage. 0.015 ohms - 800 amps of current
Volts
The relationship of potential difference to current
Chemical action
12 volts

50. What is a wire classification?
Moving vehicles
Bare - covered - insulated - stranded - cable(All of the above)
Current change in a coil creates a magnetic change
It increases or decreases the potential difference of AC electricity - It is effective with almost no loss of power - It's use- cost is very low(All of the above)