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Basic Electricity

Instructions:

Answer 50 questions in 15 minutes.
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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. The generator is what method of creating potential energy?
The relationship of potential difference to current
Electromagnetism
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Parallel circuit

2. What does a transformer transform?
Resistance value can not be changed
The relationship of potential difference to current
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Unlike poles attract

3. What is a way to classify wires and cables?
Fixed - tapped - variable(all of the above)
By their covering
Symbol
Series circuit

4. Which way is the current going in the circuit shown?(electron flow)
Circular and square mills(Both A and B)
From the negative battery terminal to the positive terminal
Fixed - Electrolytic - Variable(all of the above)
Moving vehicles

5. What is the basic law of magnetic force?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Unlike poles attract
Stranded
Bare - covered - insulated - stranded - cable(All of the above)

6. What determines whether a spark can be produced?
Strength of the charge
The direction of the magnetic field
Mutual induction
Opposes any change in the current flowing in a circuit

7. When does a DC circuit oppose current flow?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Resistance value can not be changed
Moving vehicles
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

8. What can permanently break down a capacitor?
Circular and square mills(Both A and B)
Purging
Breakdown voltage
Plastic - Rubber - Friction(all of the above)

9. What is power?
Fixed - tapped - variable(all of the above)
Mutual induction
The rate of doing work
Opposition to electrical current

10. What type of circuit has one path of follow through a load?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Secondary cell
Series circuit
Insulation resistance

11. What is an electromagnet?
Insulation resistance
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Bonding and grounding
Opposition to movement of free electrons

12. The thermocouple uses which method for creating potential energy?
Heat
Volts
Parallel circuit
Insulation resistance and Dielectric strength(Both A and B)

13. What is the term for doing work at the rate of joule per second?
1 watt
Moving vehicles
A magnetic field
Secondary cell

14. What do electrical charges need to cause a fire or explosion?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Choke
Electrical resistance against the flow of current
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

15. When reading resistance color codes - what does the first band indicate?
First digit is 9
DC current
First digit
Unlike poles attract

16. What is the term for two or more cells attached together?
Magnetic properties
Bare - covered - insulated - stranded - cable(All of the above)
Battery
Heat

17. What do we call the ability to do work?
--^V^V^V^---
Energy
How much potential difference can a material withstand before breaking down
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

18. What is another name for an inductor?
Choke
12 volts
First digit
Symbol

19. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Circular and square mills(Both A and B)
Silver
5%
Potential difference

20. Which type of cell can be recharged?
Opposition to movement of free electrons
Secondary cell
Bonding and grounding
Insulation resistance and Dielectric strength(Both A and B)

21. What is an arrangement of materials that create a potential difference by chemistry?
Amperes
Breakdown voltage
Wire splices
Cell

22. Identify the blueprint symbol for resistors.
--^V^V^V^---
Two
Circular and square mills(Both A and B)
Electrical resistance against the flow of current

23. What is a wire classification?
Bare - covered - insulated - stranded - cable(All of the above)
Voltage
Heat and current control(both a and c)
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)

24. What is resistance?
A magnetic field
Symbol
Mutual induction
Opposition to movement of free electrons

25. What is the use of the electromagnet?
12 volts
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Solenoid and Relay(both A and B)
Serial

26. Where do the fingers point in both Left-Hand Rules?
Breakdown voltage
Start with the band on the end and read to the center
The direction of the magnetic field
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

27. What is a common measure of wire diameter?
Gauge number
By their covering
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Produce heat - light - or limit current to control it(all of the above)

28. What are the two generic methods to eliminate static electricity from metal objects?
American wire gauge(AWG)
Heat
Bonding and grounding
Use an effect to produce another effect

29. What makes electrons flow?
How much potential difference can a material withstand before breaking down
Potential difference
The direction of the magnetic field
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

30. In most applications - what remains constant if the current remains constant and flows in one direction?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Stranded
Electromagnetic field
First digit

31. What is capacitance in electrical terms?
Ability to store an electric charge
First digit is 9
Moving vehicles
Insulation resistance and Dielectric strength(Both A and B)

32. What instrument measures voltage?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Voltmeter
DC current
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

33. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
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)
Parallel
First digit is 9
Choke

34. What cannot be transformed to higher or lower potential differences?
Fixed - tapped - variable(all of the above)
Chemical action
First digit
DC current

35. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Gauge number
First digit
Porcelain

36. Why is the transformer important to AC electricity?

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37. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
50 Ohms
Alternating current
The direction the negative charge moves
Stranded

38. What results when current is run through a material with high resistance?
Serial
Wire splices
Heat and current control(both a and c)
Alternating current

39. What does an object have if a magnetic field acts on it?
Magnetic properties
Series circuit
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Heat

40. What is resistance in electrical terms?
Opposition to electrical current
Stores electrical charge
Cells can be connected together to make a battery
Opposition to movement of free electrons

41. What does a third band of brown mean?
First digit is 9
Electrical resistance against the flow of current
From the negative battery terminal to the positive terminal
10

42. How is capacitance determined?
Relay
Potential difference
Area and spacing of capacitor - static current in the capacitor(both A and B)
Parallel

43. What is a common form used in conductors?
Two
Cables
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Heat

44. What is true about a dry cell?
Ability to store an electric charge
Circular and square mills(Both A and B)
Two
Common - not rechargable - gradually discharges when in storage(All of the above)

45. What is the relationship between cells and batteries?
A magnetic field
Circular and square mills(Both A and B)
Cells can be connected together to make a battery
Heat

46. What is the relationship between magnetism and electricity?
The direction of the magnetic field
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
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)
The direction the negative charge moves

47. What does static electricity do?
Does not move
Cells can be connected together to make a battery
Plastic - Rubber - Friction(all of the above)
Heat

48. What is a common cause of static electricity in a shop?
Fixed - tapped - variable(all of the above)
Cell
Moving vehicles
Resistance value can not be changed

49. What is voltage?
Ohms
By their covering
Stranded
A difference in potential energy

50. What is the purpose of capacitors in electrical circuits?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Insulation resistance
Purging
Stores electrical charge

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Basic Electricity

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