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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 is insulation resistance?
Cells can be connected together to make a battery
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Fixed - Electrolytic - Variable(all of the above)
Electrical resistance against the flow of current

2. What is an arrangement of materials that create a potential difference by chemistry?
Voltage
Cell
Plastic - Rubber - Friction(all of the above)
Serial

3. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
Bare - covered - insulated - stranded - cable(All of the above)
Opposition to electrical current
Stranded

4. What is the unit of measurement of electrical current?
Amperes
5%
Composition of the resistor
15 -000 ohms - 20%

5. 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)
Bare - covered - insulated - stranded - cable(All of the above)
Battery
Area and spacing of capacitor - static current in the capacitor(both A and B)

6. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10%
Start with the band on the end and read to the center
Porcelain
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)

7. 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
Ability to store an electric charge
Grounding wire
75 Ohms
Choke

8. How do you read resistor color codes?
Unlike poles attract
Relay
Start with the band on the end and read to the center
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

9. What does resistance produce?
Series circuit
Purging
Heat
Resistance increases as the conductor length increases

10. What is the name for electrical resistance of insulation?
Ability to store an electric charge
Opposition to movement of free electrons
Wire splices
Insulation resistance

11. What is the type of cable composed of many fine wires?
DC flows continuously in one direction and AC potential difference and current both change direction
Grounding wire
Stranded
Symbol

12. What is a property of inductors in electrical circuits?
Ability to store an electric charge
A difference in potential energy
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Opposes any change in the current flowing in a circuit

13. What is needed for electric heating elements and the filaments of light bulbs?
Ability to store an electric charge
Resistance value can not be changed
The direction of the magnetic field
High resistance

14. What makes electrons flow?
Start with the band on the end and read to the center
Moving vehicles
Potential difference
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

15. What is the basic law of magnetic force?
Use an effect to produce another effect
Tolerence
Unlike poles attract
Fixed - tapped - variable(all of the above)

16. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Battery
Stores electrical charge
5%
Unlike poles attract

17. How many kinds of poles do magnets have?
Moving vehicles
Silver
Heat
Two

18. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Chemical action
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)

19. What is induction?
Circular and square mills(Both A and B)
Composition of the resistor
Current change in a coil creates a magnetic change
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

20. The dry cell is what method for creating potential energy?
Chemical action
1/1000th of an inch
DC flows continuously in one direction and AC potential difference and current both change direction
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

21. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Wire splices
Chemical action

22. What is dielectric strength?
First digit is 9
How much potential difference can a material withstand before breaking down
Potential difference - E*I - current times current change from point to point(all of the above)
Produce heat - light - or limit current to control it(all of the above)

23. What is the relationship between cells and batteries?
Serial
Cells can be connected together to make a battery
Fixed - tapped - variable(all of the above)
Chemical action

24. When reading resistance color codes - what does the first band indicate?
By their covering
First digit
Volts
Parallel

25. Identify the blueprint symbol for capacitors.
Serial
Tolerence
Symbol
Voltage

26. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
First digit is 9
Wire splices
Parallel
Voltage

27. What are the names of two of the six primary methods of producing a voltage?
10%
The rate of doing work
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

28. What is another name for an inductor?
Choke
1 watt
The direction the negative charge moves
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

29. What determines whether a spark can be produced?
Strength of the charge
Potential difference
5%
Parallel

30. What does a moving charge produce?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
A magnetic field
First digit is 9

31. The thermocouple uses which method for creating potential energy?
Strength of the charge
Heat
From the negative battery terminal to the positive terminal
15 -000 ohms - 20%

32. Where do the fingers point in both Left-Hand Rules?
Potential difference - E*I - current times current change from point to point(all of the above)
Opposition to movement of free electrons
The direction of the magnetic field
Cables

33. What is a common measure of wire diameter?
Alternating current
Gauge number
Resistance value can not be changed
High resistance

34. What type of circuit has one path of follow through a load?
Breakdown voltage
Series circuit
American wire gauge(AWG)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

35. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Grounding wire
Porcelain
Silver

36. What does Ohm's Law represent?
Relationship between current and potential difference
Gauge number
Fixed - Electrolytic - Variable(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)

37. What can permanently break down a capacitor?
Breakdown voltage
Insulation resistance and Dielectric strength(Both A and B)
The rate of doing work
Porcelain

38. What must be large enough to carry the largest current likely to occur?
Grounding wire
Cell
Fixed - Electrolytic - Variable(all of the above)
Wire splices

39. What are the common units of measurement for round and square conductor cross - sections?
Bare - covered - insulated - stranded - cable(All of the above)
Does not move
Circular and square mills(Both A and B)
Amperes

40. What is the unit of measurement of potential difference?
Volts
Gauge number
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Purging

41. What is the relationship between magnetism and electricity?
High resistance
Produce heat - light - or limit current to control it(all of the above)
Solenoid and Relay(both A and B)
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)

42. What is a DC circuit characteristic?
Tolerence
Opposition to electrical current
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)

43. What is a common form used in conductors?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
A difference in potential energy
Cables
The direction the negative charge moves

44. What does a first band of white mean?
By their covering
Insulation resistance
First digit is 9
Two

45. What do junction boxes protect?
How much potential difference can a material withstand before breaking down
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Produce heat - light - or limit current to control it(all of the above)
Wire splices

46. What is the term for doing work at the rate of joule per second?
Secondary cell
1 watt
How much potential difference can a material withstand before breaking down
Grounding wire

47. What does a third band of brown mean?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Potential difference
10
DC current

48. What is the fundamental property of insulators?
Grounding wire
Use an effect to produce another effect
American wire gauge(AWG)
Insulation resistance and Dielectric strength(Both A and B)

49. What is a wire classification?
15 -000 ohms - 20%
Bare - covered - insulated - stranded - cable(All of the above)
Opposition to movement of free electrons
Resistance value can not be changed

50. What is the use of the electromagnet?
Circular and square mills(Both A and B)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
12 volts
Energy