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 a common measure of wire diameter?
Resistance increases as the conductor length increases
15 -000 ohms - 20%
A magnetic field
Gauge number

2. What is an electromagnet?
Volts
Stores electrical charge
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
1 watt

3. In most applications - what remains constant if the current remains constant and flows in one direction?
Fixed - Electrolytic - Variable(all of the above)
Resistance value can not be changed
American wire gauge(AWG)
Electromagnetic field

4. What instrument measures voltage?
Voltage
Bonding and grounding
Tolerence
Voltmeter

5. What is an arrangement of materials that create a potential difference by chemistry?
1/1000th of an inch
Cell
Energy
First digit

6. What is a switch that operates by electricity?
Relay
The direction of the magnetic field
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)
Does not move

7. Which of the following is a type of resistor?
Fixed - tapped - variable(all of the above)
Cables
Relationship between current and potential difference
High resistance

8. What is another name for an inductor?
15 -000 ohms - 20%
Alternating current
Choke
Bare - covered - insulated - stranded - cable(All of the above)

9. What is the relationship between magnetism and electricity?
Tolerence
Cables
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)
Current flows in one direction - potential differences across a load does not change(Both A and B)

10. What is the purpose of capacitors in electrical circuits?
Start with the band on the end and read to the center
Stores electrical charge
Common - not rechargable - gradually discharges when in storage(All of the above)
Volts

11. What is resistance?
Start with the band on the end and read to the center
Heat and current control(both a and c)
Opposition to movement of free electrons
Relay

12. What does an object have if a magnetic field acts on it?
Tolerence
Magnetic properties
Fixed - Electrolytic - Variable(all of the above)
Mutual induction

13. When reading resistance color codes - what does the fourth band indicate?
Resistance value can not be changed
10
Tolerence
Bonding and grounding

14. What is the measure of potential difference?
Volts
Insulation resistance and Dielectric strength(Both A and B)
Tolerence
Insulation resistance

15. What is dielectric strength?
How much potential difference can a material withstand before breaking down
12 volts
Parallel
Insulation resistance and Dielectric strength(Both A and B)

16. Where do the fingers point in both Left-Hand Rules?
A difference in potential energy
Series circuit
The direction of the magnetic field
Stranded

17. How is the heat production measured in a resistor?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Moving vehicles
DC flows continuously in one direction and AC potential difference and current both change direction
Potential difference - E*I - current times current change from point to point(all of the above)

18. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
Electrical resistance against the flow of current
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)
A difference in potential energy

19. What is voltage?
Insulation resistance and Dielectric strength(Both A and B)
A difference in potential energy
Opposition to movement of free electrons
Electromagnetism

20. What is induction?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Current change in a coil creates a magnetic change
1 watt
Parallel

21. What is a wire classification?
Bare - covered - insulated - stranded - cable(All of the above)
Heat
Cells can be connected together to make a battery
Fixed - tapped - variable(all of the above)

22. When does a DC circuit oppose current flow?
Fixed - Electrolytic - Variable(all of the above)
Does not move
Purging
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

23. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Parallel
10
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

24. What is a rigid metal conduit?
Resistance increases as the conductor length increases
Use an effect to produce another effect
Secondary cell
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

25. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
A difference in potential energy
Does not move
Common - not rechargable - gradually discharges when in storage(All of the above)

26. What is the difference between AC and DC?
1/1000th of an inch
Use an effect to produce another effect
Ability to store an electric charge
DC flows continuously in one direction and AC potential difference and current both change direction

27. Why is the transformer important to AC electricity?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

28. What can permanently break down a capacitor?
Breakdown voltage
Current change in a coil creates a magnetic change
Composition of the resistor
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

29. What results when current is run through a material with high resistance?
Opposition to electrical current
Porcelain
Moving vehicles
Heat and current control(both a and c)

30. What determines the resistance of a resistor?
Composition of the resistor
12 volts
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Heat

31. What are the common units of measurement for round and square conductor cross - sections?
Energy
10
American wire gauge(AWG)
Circular and square mills(Both A and B)

32. What is the term for doing work at the rate of joule per second?
Cells can be connected together to make a battery
1 watt
75 Ohms
Opposition to electrical current

33. What is needed for electric heating elements and the filaments of light bulbs?
Purging
Potential difference
High resistance
Start with the band on the end and read to the center

34. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Common - not rechargable - gradually discharges when in storage(All of the above)
Voltage
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)

35. What is the purpose of a raceway?
5%
Circular and square mills(Both A and B)
Current change in a coil creates a magnetic change
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

36. What does a transformer transform?
The relationship of potential difference to current
Use an effect to produce another effect
Gauge number
Relationship between current and potential difference

37. Identify the blueprint symbol for resistors.
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
How much potential difference can a material withstand before breaking down
Cells can be connected together to make a battery
--^V^V^V^---

38. The thermocouple uses which method for creating potential energy?
Choke
Mutual induction
Opposition to electrical current
Heat

39. How is capacitance determined?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Does not move
15 -000 ohms - 20%
Choke

40. How many kinds of poles do magnets have?
DC flows continuously in one direction and AC potential difference and current both change direction
Choke
Two
Unlike poles attract

41. What does Ohm's Law represent?
Use an effect to produce another effect
Volts
Relationship between current and potential difference
Plastic - Rubber - Friction(all of the above)

42. Identify the blueprint symbol for capacitors.
12 volts
Opposes any change in the current flowing in a circuit
Symbol
Circular and square mills(Both A and B)

43. What does a first band of white mean?
1 watt
How much potential difference can a material withstand before breaking down
Bare - covered - insulated - stranded - cable(All of the above)
First digit is 9

44. What is the unit of measurement of potential difference?
20%
Heat
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Volts

45. The dry cell is what method for creating potential energy?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Composition of the resistor
Fixed - Electrolytic - Variable(all of the above)
Chemical action

46. What cannot be transformed to higher or lower potential differences?
Stores electrical charge
DC current
Plastic - Rubber - Friction(all of the above)
Wire splices

47. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Purging
Ohms
Electromagnetism
First digit is 9

48. What is a common form used in conductors?
DC flows continuously in one direction and AC potential difference and current both change direction
Two
Fixed - tapped - variable(all of the above)
Cables

49. What are the two generic methods to eliminate static electricity from metal objects?
Resistance increases as the conductor length increases
A difference in potential energy
Bonding and grounding
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

50. What is the unit of measurement of resistance?
Solenoid and Relay(both A and B)
American wire gauge(AWG)
Plastic - Rubber - Friction(all of the above)
Ohms