Test your basic knowledge |

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 is the term for doing work at the rate of joule per second?
--^V^V^V^---
Series circuit
First digit
1 watt

2. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Ability to store an electric charge
5%
Moving vehicles
Mutual induction

3. What is the difference between AC and DC?
DC flows continuously in one direction and AC potential difference and current both change direction
15 -000 ohms - 20%
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Fixed - tapped - variable(all of the above)

4. What makes electrons flow?
Unlike poles attract
Potential difference
DC flows continuously in one direction and AC potential difference and current both change direction
Electrical resistance against the flow of current

5. What is the purpose of a raceway?
A difference in potential energy
Bonding and grounding
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Resistance increases as the conductor length increases

6. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Stranded
Potential difference
50 Ohms
How much potential difference can a material withstand before breaking down

7. What is a rigid metal conduit?
Bare - covered - insulated - stranded - cable(All of the above)
Heat and current control(both a and c)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
How much potential difference can a material withstand before breaking down

8. What is a DC circuit characteristic?
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)
DC flows continuously in one direction and AC potential difference and current both change direction
10%
Current flows in one direction - potential differences across a load does not change(Both A and B)

9. When does a DC circuit oppose current flow?
DC current
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Volts
DC flows continuously in one direction and AC potential difference and current both change direction

10. How do you read resistor color codes?
Magnetic properties
Start with the band on the end and read to the center
Parallel
Tolerence

11. What is a characteristic of insulators?
Heat
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Gauge number

12. What results when current is run through a material with high resistance?
Chemical action
Heat and current control(both a and c)
--^V^V^V^---
American wire gauge(AWG)

13. What is capacitance in electrical terms?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
5%
Choke
Ability to store an electric charge

14. What is a wire classification?
Relationship between current and potential difference
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)
Use an effect to produce another effect
Bare - covered - insulated - stranded - cable(All of the above)

15. What type of circuit has one path of follow through a load?
Symbol
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Series circuit
Current flows in one direction - potential differences across a load does not change(Both A and B)

16. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
Resistance value can not be changed
The direction the negative charge moves
Grounding wire

17. What makes electrons flow?
Opposition to movement of free electrons
Symbol
Electromagnetic field
Potential difference

18. What is another name for an inductor?
Relationship between current and potential difference
Plastic - Rubber - Friction(all of the above)
Moving vehicles
Choke

19. Which way is the current going in the circuit shown?(electron flow)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
From the negative battery terminal to the positive terminal
Gauge number
Magnetic properties

20. The thermocouple uses which method for creating potential energy?
Heat
Symbol
First digit is 9
Insulation resistance

21. What is the purpose of resistors in electrical circuits?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Produce heat - light - or limit current to control it(all of the above)
Opposition to electrical current
Alternating current

22. What determines whether a spark can be produced?
Electromagnetism
Breakdown voltage
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Strength of the charge

23. What is the relationship of conductor size and length to resistance?
Parallel
Grounding wire
20%
Resistance increases as the conductor length increases

24. What is the name for electrical resistance of insulation?
Battery
Insulation resistance
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
DC current

25. What is the relationship between magnetism and electricity?
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)
Electrical resistance against the flow of current
DC flows continuously in one direction and AC potential difference and current both change direction
First digit is 9

26. What does Ohm's Law represent?
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)
Relationship between current and potential difference
Electrical resistance against the flow of current
Porcelain

27. What is the use of the electromagnet?
Tolerence
Grounding wire
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

28. Identify the blueprint symbol for capacitors.
Symbol
Does not move
Choke
Mutual induction

29. Identify the blueprint symbol for resistors.
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Choke
Cells can be connected together to make a battery
--^V^V^V^---

30. Given R=E / I and the following information - plug in the data and solve the problem for resistance. 1.5 volt walkman battery - 0.02 amps of current
Amperes
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Fixed - tapped - variable(all of the above)
75 Ohms

31. What is induction?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Potential difference
Current change in a coil creates a magnetic change
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)

32. What is the relationship between cells and batteries?
Silver
Volts
Cells can be connected together to make a battery
50 Ohms

33. What does a moving charge produce?
Purging
75 Ohms
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
A magnetic field

34. Where does the thumb point in both Left-Hand Rules?
Battery
The direction the negative charge moves
From the negative battery terminal to the positive terminal
Secondary cell

35. When reading resistance color codes - what does the first band indicate?
Wire splices
Symbol
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
First digit

36. What is a common cause of static electricity in a shop?
Moving vehicles
Volts
Opposition to electrical current
12 volts

37. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
A difference in potential energy
Serial
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

38. What is insulation resistance?
10
Electrical resistance against the flow of current
Purging
Resistance increases as the conductor length increases

39. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Cables
Gauge number
12 volts

40. To what measurement do the conductor mills refer?
Voltmeter
1/1000th of an inch
Start with the band on the end and read to the center
Silver

41. 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
Potential difference
Magnetic properties
12 volts
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

42. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
20%
Insulation resistance
Current change in a coil creates a magnetic change
Alternating current

43. Identify the general blueprint symbol for inductors.
Symbol
10
10%
Breakdown voltage

44. What is the term for two or more cells attached together?
Wire splices
Bonding and grounding
Battery
15 -000 ohms - 20%

45. What does a third band of brown mean?
Opposition to electrical current
10
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)
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)

46. What is dielectric strength?
How much potential difference can a material withstand before breaking down
A difference in potential energy
Voltmeter
First digit

47. Which material has the lowest resistance at ordinary temperatures?
By their covering
Silver
Cells can be connected together to make a battery
Secondary cell

48. Which type of cell can be recharged?
Opposition to electrical current
Bare - covered - insulated - stranded - cable(All of the above)
Secondary cell
Insulation resistance

49. Which of the following materials is NOT a good conductor?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Porcelain
50 Ohms
DC current

50. What do junction boxes protect?
75 Ohms
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Moving vehicles
Wire splices