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Basic Electricity

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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 are the names of two of the six primary methods of producing a voltage?
Electromagnetic field
Opposition to electrical current
Produce heat - light - or limit current to control it(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

2. What does a third band of brown mean?
Common - not rechargable - gradually discharges when in storage(All of the above)
5%
10
Wire splices

3. What makes electrons flow?
Alternating current
Potential difference
Wire splices
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

4. What is resistance?
15 -000 ohms - 20%
Symbol
Opposition to movement of free electrons
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 do transducers do in electrical terms?
Solenoid and Relay(both A and B)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Use an effect to produce another effect

6. What is voltage?
A difference in potential energy
Heat
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Relay

7. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Parallel
Insulation resistance
Cell
First digit

8. What type of circuit has one path of follow through a load?
Electromagnetic field
Potential difference - E*I - current times current change from point to point(all of the above)
Series circuit
Parallel

9. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Electromagnetic field
20%
Fixed - tapped - variable(all of the above)
Magnetic properties

10. What is resistance in electrical terms?
Opposition to electrical current
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Ohms

11. What types of protective tapes are used?
Resistance value can not be changed
75 Ohms
Plastic - Rubber - Friction(all of the above)
Relay

12. What is a rigid metal conduit?
Insulation resistance
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Series circuit
Current change in a coil creates a magnetic change

13. What does an object have if a magnetic field acts on it?
Insulation resistance and Dielectric strength(Both A and B)
12 volts
Magnetic properties
Stranded

14. Which of the following materials is NOT a good conductor?
Porcelain
Gauge number
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
High resistance

15. What is a common measure of wire diameter?
Symbol
Gauge number
Choke
Opposition to movement of free electrons

16. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
50 Ohms
Secondary cell
Chemical action

17. Identify the blueprint symbol for capacitors.
Symbol
Fixed - Electrolytic - Variable(all of the above)
The direction the negative charge moves
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)

18. How many kinds of poles do magnets have?
Ohms
Two
12 volts
Opposition to electrical current

19. Which type of cell can be recharged?
Cell
15 -000 ohms - 20%
Volts
Secondary cell

20. When reading resistance color codes - what does the fourth band indicate?
Plastic - Rubber - Friction(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Electrical resistance against the flow of current
Tolerence

21. What is a wire classification?
Bare - covered - insulated - stranded - cable(All of the above)
10
Ability to store an electric charge
Opposition to movement of free electrons

22. What is a way to classify wires and cables?
By their covering
Resistance increases as the conductor length increases
Start with the band on the end and read to the center
Volts

23. What is another name for an inductor?
The direction of the magnetic field
Relay
Ohms
Choke

24. Which material has the lowest resistance at ordinary temperatures?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Tolerence
Insulation resistance
Silver

25. What is an electromagnet?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Electromagnetic field
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Fixed - tapped - variable(all of the above)

26. How is capacitance determined?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Area and spacing of capacitor - static current in the capacitor(both A and B)
Silver
Heat

27. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Battery
Electromagnetism

28. What does a transformer transform?
DC flows continuously in one direction and AC potential difference and current both change direction
The relationship of potential difference to current
Secondary cell
Chemical action

29. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Choke
Opposition to movement of free electrons
Ability to store an electric charge
Serial

30. What information do the Left-Hand Rules provide?
Circular and square mills(Both A and B)
Relay
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
75 Ohms

31. What is the relationship between cells and batteries?
Serial
Resistance increases as the conductor length increases
Energy
Cells can be connected together to make a battery

32. What is the purpose of capacitors in electrical circuits?
Heat
50 Ohms
The direction the negative charge moves
Stores electrical charge

33. What is a property of inductors in electrical circuits?
DC current
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Stranded
Opposes any change in the current flowing in a circuit

34. How do static charges distribute themselves?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Serial
20%

35. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
50 Ohms
Battery
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

36. What is the unit of measurement of electrical current?
Opposes any change in the current flowing in a circuit
Voltmeter
Volts
Amperes

37. What type of circuit has two or more paths for current to follow?
Gauge number
Parallel circuit
Current change in a coil creates a magnetic change
Insulation resistance and Dielectric strength(Both A and B)

38. Identify the blueprint symbol for resistors.
Voltmeter
Wire splices
Moving vehicles
--^V^V^V^---

39. What is a conductor?
Parallel circuit
5%
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Wire splices

40. The dry cell is what method for creating potential energy?
High resistance
Chemical action
Silver
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

41. What do junction boxes protect?
First digit is 9
1 watt
Wire splices
A magnetic field

42. The thermocouple uses which method for creating potential energy?
Strength of the charge
Heat
Opposition to electrical current
Potential difference

43. What is an arrangement of materials that create a potential difference by chemistry?
Symbol
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Strength of the charge
Cell

44. What does a first band of white mean?
Choke
Start with the band on the end and read to the center
Tolerence
First digit is 9

45. Where does the thumb point in both Left-Hand Rules?
The direction the negative charge moves
Cell
Relationship between current and potential difference
Tolerence

46. What is the measure of potential difference?
Volts
Porcelain
High resistance
Symbol

47. How is the heat production measured in a resistor?
Tolerence
Potential difference - E*I - current times current change from point to point(all of the above)
Symbol
Stores electrical charge

48. What cannot be transformed to higher or lower potential differences?
DC current
Insulation resistance
Produce heat - light - or limit current to control it(all of the above)
Alternating current

49. What do we call the ability to do work?
Energy
Fixed - Electrolytic - Variable(all of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)
Volts

50. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
Ohms
Does not move
Stranded

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Basic Electricity

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