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Basic Electricity

Instructions:

Answer 50 questions in 15 minutes.
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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 characteristic of a fixed resistor?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Current change in a coil creates a magnetic change
Resistance value can not be changed
Moving vehicles

2. What is another name for an inductor?
Choke
Stranded
Ability to store an electric charge
High resistance

3. What information do the Left-Hand Rules provide?
Stores electrical charge
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Voltage
DC current

4. What is the name for electrical resistance of insulation?
Insulation resistance
Heat
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Secondary cell

5. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Fixed - Electrolytic - Variable(all of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Voltage
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

6. What is resistance?
Serial
10
Tolerence
Opposition to movement of free electrons

7. What must be large enough to carry the largest current likely to occur?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Grounding wire
High resistance
Choke

8. What does static electricity do?
Does not move
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
15 -000 ohms - 20%

9. What cannot be transformed to higher or lower potential differences?
DC current
Resistance increases as the conductor length increases
Grounding wire
Electromagnetism

10. What determines the resistance of a resistor?
Composition of the resistor
Ohms
--^V^V^V^---
Battery

11. The dry cell is what method for creating potential energy?
Chemical action
Opposes any change in the current flowing in a circuit
Composition of the resistor
Area and spacing of capacitor - static current in the capacitor(both A and B)

12. What is the type of cable composed of many fine wires?
A difference in potential energy
--^V^V^V^---
Stranded
Common - not rechargable - gradually discharges when in storage(All of the above)

13. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Choke
Heat and current control(both a and c)
Current change in a coil creates a magnetic change
10%

14. What is capacitance in electrical terms?
Series circuit
Relationship between current and potential difference
First digit
Ability to store an electric charge

15. What can permanently break down a capacitor?
Breakdown voltage
Series circuit
The direction the negative charge moves
20%

16. Identify the general blueprint symbol for inductors.
First digit is 9
Symbol
Strength of the charge
Volts

17. What is true about a dry cell?
Moving vehicles
Common - not rechargable - gradually discharges when in storage(All of the above)
Electromagnetism
Area and spacing of capacitor - static current in the capacitor(both A and B)

18. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
A magnetic field
5%
American wire gauge(AWG)
Breakdown voltage

19. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Breakdown voltage
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)
Insulation resistance
20%

20. Identify the blueprint symbol for resistors.
--^V^V^V^---
Alternating current
Start with the band on the end and read to the center
Fixed - tapped - variable(all of the above)

21. Identify the blueprint symbol for capacitors.
American wire gauge(AWG)
Symbol
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Porcelain

22. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Relay
Parallel
Alternating current
Mutual induction

23. What is the relationship of conductor size and length to resistance?
Parallel circuit
Start with the band on the end and read to the center
Two
Resistance increases as the conductor length increases

24. What is dielectric strength?
Insulation resistance
How much potential difference can a material withstand before breaking down
Symbol
--^V^V^V^---

25. In most applications - what remains constant if the current remains constant and flows in one direction?
Potential difference
Series circuit
Electromagnetic field
Cables

26. What does Ohm's Law represent?
Relationship between current and potential difference
Two
Bare - covered - insulated - stranded - cable(All of the above)
20%

27. What is the unit of measurement of electrical current?
The rate of doing work
Ability to store an electric charge
Secondary cell
Amperes

28. The thermocouple uses which method for creating potential energy?
Use an effect to produce another effect
Area and spacing of capacitor - static current in the capacitor(both A and B)
Symbol
Heat

29. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
10%
50 Ohms
First digit is 9
Bonding and grounding

30. What are the common units of measurement for round and square conductor cross - sections?
Electromagnetic field
Electromagnetism
Circular and square mills(Both A and B)
Opposes any change in the current flowing in a circuit

31. What is a common cause of static electricity in a shop?
Tolerence
Secondary cell
Fixed - tapped - variable(all of the above)
Moving vehicles

32. What is the relationship between cells and batteries?
Battery
A magnetic field
Fixed - Electrolytic - Variable(all of the above)
Cells can be connected together to make a battery

33. How is capacitance determined?
50 Ohms
Area and spacing of capacitor - static current in the capacitor(both A and B)
First digit
Battery

34. What makes electrons flow?
Potential difference
12 volts
Parallel circuit
Gauge number

35. 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
Potential difference - E*I - current times current change from point to point(all of the above)
Unlike poles attract
75 Ohms
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

36. Which way is the current going in the circuit shown?(electron flow)
1 watt
From the negative battery terminal to the positive terminal
Silver
Symbol

37. What is a common measure of wire diameter?
Insulation resistance and Dielectric strength(Both A and B)
Gauge number
Heat
Current change in a coil creates a magnetic change

38. 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
Start with the band on the end and read to the center
Parallel circuit
Voltage
12 volts

39. What determines whether a spark can be produced?
Porcelain
Fixed - Electrolytic - Variable(all of the above)
Energy
Strength of the charge

40. What is the term for doing work at the rate of joule per second?
1 watt
Symbol
Cells can be connected together to make a battery
Composition of the resistor

41. What is voltage?
Moving vehicles
A difference in potential energy
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Mutual induction

42. What is an arrangement of materials that create a potential difference by chemistry?
Potential difference - E*I - current times current change from point to point(all of the above)
Plastic - Rubber - Friction(all of the above)
Cell
Battery

43. What types of protective tapes are used?
Secondary cell
Plastic - Rubber - Friction(all of the above)
Wire splices
Area and spacing of capacitor - static current in the capacitor(both A and B)

44. What is needed for electric heating elements and the filaments of light bulbs?
High resistance
Insulation resistance
Relationship between current and potential difference
Current flows in one direction - potential differences across a load does not change(Both A and B)

45. What is the purpose of capacitors in electrical circuits?
Opposition to movement of free electrons
Stores electrical charge
DC current
First digit is 9

46. What is the purpose of a raceway?
Alternating current
Potential difference
Cell
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

47. What is the term for two or more cells attached together?
Produce heat - light - or limit current to control it(all of the above)
Battery
Cells can be connected together to make a battery
Does not move

48. What instrument measures voltage?
Unlike poles attract
Composition of the resistor
Voltmeter
Heat and current control(both a and c)

49. To what measurement do the conductor mills refer?
Heat and current control(both a and c)
1/1000th of an inch
Insulation resistance and Dielectric strength(Both A and B)
Silver

50. What is a type of capacitor?
Porcelain
Wire splices
Start with the band on the end and read to the center
Fixed - Electrolytic - Variable(all of the above)

Can you answer 50 questions in 15 minutes?

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Basic Electricity

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