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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. To what measurement do the conductor mills refer?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
1/1000th of an inch
Relay
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

2. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
Produce heat - light - or limit current to control it(all of the above)
Insulation resistance
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

3. What wire measurement is commonly used in the U.S.?
Relay
American wire gauge(AWG)
Chemical action
Secondary cell

4. What do transducers do in electrical terms?
Electromagnetic field
How much potential difference can a material withstand before breaking down
20%
Use an effect to produce another effect

5. Which way is the current going in the circuit shown?(electron flow)
Relationship between current and potential difference
From the negative battery terminal to the positive terminal
The relationship of potential difference to current
Heat

6. Where do the fingers point in both Left-Hand Rules?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Choke
American wire gauge(AWG)
The direction of the magnetic field

7. Identify the blueprint symbol for capacitors.
Symbol
Ohms
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Volts

8. What is a common cause of static electricity in a shop?
DC flows continuously in one direction and AC potential difference and current both change direction
Moving vehicles
Bonding and grounding
Alternating current

9. What is the term for doing work at the rate of joule per second?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
1 watt
Solenoid and Relay(both A and B)
From the negative battery terminal to the positive terminal

10. What information do the Left-Hand Rules provide?
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)
American wire gauge(AWG)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Volts

11. What is a way to classify wires and cables?
Electromagnetic field
Battery
Plastic - Rubber - Friction(all of the above)
By their covering

12. How do static charges distribute themselves?
Relay
By their covering
Resistance increases as the conductor length increases
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

13. What is the purpose of capacitors in electrical circuits?
High resistance
Breakdown voltage
Stores electrical charge
American wire gauge(AWG)

14. What is the basic law of magnetic force?
Purging
Unlike poles attract
Physical protection for conductors - Grounding for conductors - Concealment for conductors(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)

15. Why is the transformer important to AC electricity?

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16. What makes electrons flow?
Potential difference
Use an effect to produce another effect
Voltmeter
Cables

17. What is a wire classification?
American wire gauge(AWG)
Bare - covered - insulated - stranded - cable(All of the above)
Symbol
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)

18. What is the relationship between magnetism and electricity?
From the negative battery terminal to the positive terminal
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Fixed - tapped - variable(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)

19. What does a third band of brown mean?
10
Insulation resistance and Dielectric strength(Both A and B)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Solenoid and Relay(both A and B)

20. When reading resistance color codes - what does the fourth band indicate?
Current change in a coil creates a magnetic change
Tolerence
DC flows continuously in one direction and AC potential difference and current both change direction
Does not move

21. How is capacitance determined?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Ohms
Area and spacing of capacitor - static current in the capacitor(both A and B)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

22. What is power?
Symbol
Magnetic properties
The rate of doing work
Relay

23. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10%
Wire splices
Heat
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

24. What does a moving charge produce?
A magnetic field
Does not move
The relationship of potential difference to current
The direction of the magnetic field

25. What is a common measure of wire diameter?
How much potential difference can a material withstand before breaking down
Gauge number
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Electromagnetic field

26. What is the purpose of resistors in electrical circuits?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
American wire gauge(AWG)
12 volts
Produce heat - light - or limit current to control it(all of the above)

27. What instrument measures voltage?
Magnetic properties
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Symbol
Voltmeter

28. What type of circuit has one path of follow through a load?
Stranded
Series circuit
DC current
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

29. What is a type of capacitor?
Silver
Bonding and grounding
Fixed - Electrolytic - Variable(all of the above)
High resistance

30. How do you read resistor color codes?
Start with the band on the end and read to the center
Current change in a coil creates a magnetic change
Parallel circuit
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

31. What is dielectric strength?
Plastic - Rubber - Friction(all of the above)
How much potential difference can a material withstand before breaking down
Unlike poles attract
Common - not rechargable - gradually discharges when in storage(All of the above)

32. What is the term for two or more cells attached together?
Battery
Volts
DC flows continuously in one direction and AC potential difference and current both change direction
Fixed - Electrolytic - Variable(all of the above)

33. 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
Parallel circuit
12 volts
A difference in potential energy
Grounding wire

34. What is a characteristic of a fixed resistor?
Moving vehicles
Resistance value can not be changed
The direction the negative charge moves
Bonding and grounding

35. A resistor is color coded brown - green - orange. What is its resistance?
15 -000 ohms - 20%
Stranded
Electromagnetism
Fixed - Electrolytic - Variable(all of the above)

36. What does Ohm's Law represent?
10
Fixed - Electrolytic - Variable(all of the above)
Relationship between current and potential difference
Gauge number

37. What determines the resistance of a resistor?
Symbol
Composition of the resistor
Heat
Choke

38. What makes electrons flow?
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)
Resistance increases as the conductor length increases
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Potential difference

39. The thermocouple uses which method for creating potential energy?
Heat
Voltmeter
Bonding and grounding
American wire gauge(AWG)

40. What is a DC circuit characteristic?
Grounding wire
Current flows in one direction - potential differences across a load does not change(Both A and B)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Resistance value can not be changed

41. What are the two generic methods to eliminate static electricity from metal objects?
Stores electrical charge
Volts
Cells can be connected together to make a battery
Bonding and grounding

42. What is induction?
Current change in a coil creates a magnetic change
Cells can be connected together to make a battery
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Relay

43. What is needed for electric heating elements and the filaments of light bulbs?
Relationship between current and potential difference
1 watt
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
High resistance

44. What is a conductor?
First digit is 9
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Strength of the charge
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)

45. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Parallel
Bare - covered - insulated - stranded - cable(All of the above)
Direction of: electric charge - magnetic field - force of the moving charge(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 do electrical charges need to cause a fire or explosion?
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)
How much potential difference can a material withstand before breaking down
Cell
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

47. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
1 watt
12 volts
5%
Potential difference - E*I - current times current change from point to point(all of the above)

48. What is resistance?
Opposition to movement of free electrons
Resistance increases as the conductor length increases
Gauge number
--^V^V^V^---

49. What does static electricity do?
Does not move
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Cables
Volts

50. When reading resistance color codes - what does the first band indicate?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Potential difference
Electromagnetic field
First digit