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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 type of circuit has two or more paths for current to follow?
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)
The direction the negative charge moves
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Parallel circuit

2. What is a common measure of wire diameter?
Cables
Volts
Use an effect to produce another effect
Gauge number

3. What is a type of capacitor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Fixed - Electrolytic - Variable(all of the above)
The rate of doing work
Series circuit

4. What is the type of cable composed of many fine wires?
Gauge number
Stranded
Moving vehicles
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)

5. What makes electrons flow?
Plastic - Rubber - Friction(all of the above)
Potential difference
Electrical resistance against the flow of current
Breakdown voltage

6. What is true about a dry cell?
10
Wire splices
Common - not rechargable - gradually discharges when in storage(All of the above)
Breakdown voltage

7. What is induction?
Current change in a coil creates a magnetic change
A difference in potential energy
--^V^V^V^---
10

8. What is a characteristic of a fixed resistor?
Secondary cell
Resistance value can not be changed
5%
75 Ohms

9. What is the unit of measurement of electrical current?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Amperes
Potential difference - E*I - current times current change from point to point(all of the above)

10. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Potential difference - E*I - current times current change from point to point(all of the above)
Alternating current
Strength of the charge
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

11. What are the two generic methods to eliminate static electricity from metal objects?
Bonding and grounding
Heat
A difference in potential energy
Ability to store an electric charge

12. What is the term for doing work at the rate of joule per second?
Cells can be connected together to make a battery
Relay
How much potential difference can a material withstand before breaking down
1 watt

13. What is a wire classification?
Bare - covered - insulated - stranded - cable(All of the above)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
1/1000th of an inch
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

14. What is a common cause of static electricity in a shop?
Moving vehicles
The direction of the magnetic field
Tolerence
Choke

15. What instrument measures voltage?
Common - not rechargable - gradually discharges when in storage(All of the above)
Voltmeter
Relationship between current and potential difference
Current change in a coil creates a magnetic change

16. When reading resistance color codes - what does the first band indicate?
Relationship between current and potential difference
First digit
Stores electrical charge
Energy

17. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Strength of the charge
10%
The direction of the magnetic field
Volts

18. How do you read resistor color codes?
Amperes
Insulation resistance and Dielectric strength(Both A and B)
A magnetic field
Start with the band on the end and read to the center

19. 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)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
The direction the negative charge moves
The relationship of potential difference to current

20. Identify the blueprint symbol for capacitors.
High resistance
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Energy
Symbol

21. What is a characteristic of insulators?
High resistance
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Potential difference
Ability to store an electric charge

22. What wire measurement is commonly used in the U.S.?
American wire gauge(AWG)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Ohms
Bare - covered - insulated - stranded - cable(All of the above)

23. What is the basic law of magnetic force?
Symbol
Unlike poles attract
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)
DC flows continuously in one direction and AC potential difference and current both change direction

24. The thermocouple uses which method for creating potential energy?
Mutual induction
Solenoid and Relay(both A and B)
Serial
Heat

25. What is a property of inductors in electrical circuits?
Potential difference
Opposes any change in the current flowing in a circuit
Relationship between current and potential difference
Symbol

26. What do transducers do in electrical terms?
Cables
Use an effect to produce another effect
Does not move
Ability to store an electric charge

27. 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)
Amperes
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Two

28. What is the difference between AC and DC?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
Moving vehicles
10

29. What results when current is run through a material with high resistance?
Circular and square mills(Both A and B)
75 Ohms
Heat and current control(both a and c)
Area and spacing of capacitor - static current in the capacitor(both A and B)

30. What type of circuit has one path of follow through a load?
First digit
Current change in a coil creates a magnetic change
Series circuit
Does not move

31. What do junction boxes protect?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Wire splices
Electrical resistance against the flow of current
DC flows continuously in one direction and AC potential difference and current both change direction

32. What is a common form used in conductors?
1 watt
Alternating current
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)
Cables

33. Which of the following materials is NOT a good conductor?
15 -000 ohms - 20%
Volts
Porcelain
Cell

34. What is capacitance in electrical terms?
Wire splices
Ability to store an electric charge
Cables
75 Ohms

35. What is insulation resistance?
Heat and current control(both a and c)
Electrical resistance against the flow of current
Bare - covered - insulated - stranded - cable(All of the above)
Produce heat - light - or limit current to control it(all of the above)

36. What does Ohm's Law represent?
Serial
Voltmeter
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)
Relationship between current and potential difference

37. What does a third band of brown mean?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
10
Series circuit
Choke

38. What is a rigid metal conduit?
Cells can be connected together to make a battery
First digit is 9
Chemical action
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

39. What is the relationship between cells and batteries?
Unlike poles attract
Series circuit
Common - not rechargable - gradually discharges when in storage(All of the above)
Cells can be connected together to make a battery

40. What are the common units of measurement for round and square conductor cross - sections?
Alternating current
Relay
Series circuit
Circular and square mills(Both A and B)

41. What is a switch that operates by electricity?
Potential difference
Start with the band on the end and read to the center
Relay
The direction the negative charge moves

42. What is the purpose of capacitors in electrical circuits?
Parallel
The direction the negative charge moves
Stores electrical charge
How much potential difference can a material withstand before breaking down

43. What must be large enough to carry the largest current likely to occur?
Common - not rechargable - gradually discharges when in storage(All of the above)
Resistance value can not be changed
Grounding wire
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)

44. What is the unit of measurement of potential difference?
Symbol
Circular and square mills(Both A and B)
Volts
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

45. What cannot be transformed to higher or lower potential differences?
DC current
Circular and square mills(Both A and B)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Stranded

46. When reading resistance color codes - what does the fourth band indicate?
20%
Relationship between current and potential difference
Tolerence
Start with the band on the end and read to the center

47. Identify the general blueprint symbol for inductors.
Battery
DC flows continuously in one direction and AC potential difference and current both change direction
Symbol
Parallel circuit

48. The dry cell is what method for creating potential energy?
20%
Chemical action
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Parallel circuit

49. What is an electromagnet?
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)
Choke
Insulation resistance and Dielectric strength(Both A and B)

50. 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)
Alternating current
Parallel circuit
Heat