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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. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Bonding and grounding
Parallel
Electromagnetic field
Wire splices

2. What is a conductor?
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 of the magnetic field
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Plastic - Rubber - Friction(all of the above)

3. What is needed for electric heating elements and the filaments of light bulbs?
Electromagnetic field
Does not move
High resistance
The rate of doing work

4. The dry cell is what method for creating potential energy?
Chemical action
Electrical resistance against the flow of current
By their covering
Circular and square mills(Both A and B)

5. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
Heat and current control(both a and c)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Fixed - Electrolytic - Variable(all of the above)

6. What must be large enough to carry the largest current likely to occur?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Grounding wire
Alternating current
The direction the negative charge moves

7. What determines whether a spark can be produced?
Strength of the charge
Gauge number
Mutual induction
First digit is 9

8. What is the purpose of resistors in electrical circuits?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
A magnetic field
Produce heat - light - or limit current to control it(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)

9. What is true about a dry cell?
Heat
Common - not rechargable - gradually discharges when in storage(All of the above)
Circular and square mills(Both A and B)
Relationship between current and potential difference

10. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Current change in a coil creates a magnetic change
Electrical resistance against the flow of current
Purging
Insulation resistance

11. 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
75 Ohms
Breakdown voltage
Composition of the resistor
Fixed - tapped - variable(all of the above)

12. What is a common cause of static electricity in a shop?
Breakdown voltage
Opposition to electrical current
Moving vehicles
Current change in a coil creates a magnetic change

13. What are the two generic methods to eliminate static electricity from metal objects?
A difference in potential energy
Secondary cell
Series circuit
Bonding and grounding

14. What does static electricity do?
Does not move
Relationship between current and potential difference
Electromagnetism
Strength of the charge

15. What type of circuit has two or more paths for current to follow?
DC flows continuously in one direction and AC potential difference and current both change direction
Parallel circuit
Voltage
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

16. Identify the general blueprint symbol for inductors.
Area and spacing of capacitor - static current in the capacitor(both A and B)
Cells can be connected together to make a battery
Grounding wire
Symbol

17. What is the unit of measurement of resistance?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Ohms
Heat
The direction of the magnetic field

18. Identify the blueprint symbol for resistors.
Grounding wire
DC flows continuously in one direction and AC potential difference and current both change direction
--^V^V^V^---
DC current

19. What is a property of inductors in electrical circuits?
Two
Symbol
Opposes any change in the current flowing in a circuit
Serial

20. What cannot be transformed to higher or lower potential differences?
DC current
1/1000th of an inch
Voltmeter
Grounding wire

21. What is the unit of measurement of potential difference?
Porcelain
Bare - covered - insulated - stranded - cable(All of the above)
Ability to store an electric charge
Volts

22. What does a third band of brown mean?
Electrical resistance against the flow of current
Bare - covered - insulated - stranded - cable(All of the above)
10
From the negative battery terminal to the positive terminal

23. How many kinds of poles do magnets have?
Two
Parallel circuit
5%
Potential difference

24. Which material has the lowest resistance at ordinary temperatures?
Silver
1 watt
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Heat

25. What is the unit of measurement of electrical current?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
American wire gauge(AWG)
First digit is 9
Amperes

26. What is a DC circuit characteristic?
A magnetic field
Heat
Current flows in one direction - potential differences across a load does not change(Both A and B)
Common - not rechargable - gradually discharges when in storage(All of the above)

27. What is voltage?
Voltage
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
A difference in potential energy
Resistance value can not be changed

28. What do junction boxes protect?
Plastic - Rubber - Friction(all of the above)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Grounding wire
Wire splices

29. What is the purpose of a raceway?
Bonding and grounding
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Plastic - Rubber - Friction(all of the above)
Volts

30. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
Opposes any change in the current flowing in a circuit
Breakdown voltage
Start with the band on the end and read to the center

31. What is the relationship between cells and batteries?
5%
Cells can be connected together to make a battery
Relationship between current and potential difference
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

32. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Symbol
10%
Secondary cell
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

33. What is an electromagnet?
Heat
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Heat
Potential difference - E*I - current times current change from point to point(all of the above)

34. What is the basic law of magnetic force?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Unlike poles attract
Potential difference
Circular and square mills(Both A and B)

35. What are the common units of measurement for round and square conductor cross - sections?
Cell
Circular and square mills(Both A and B)
Grounding wire
First digit

36. What does an object have if a magnetic field acts on it?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
American wire gauge(AWG)
Series circuit
Magnetic properties

37. What types of protective tapes are used?
Ohms
Plastic - Rubber - Friction(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
From the negative battery terminal to the positive terminal

38. What is a common measure of wire diameter?
50 Ohms
Moving vehicles
Magnetic properties
Gauge number

39. What is a way to classify wires and cables?
By their covering
Tolerence
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
The relationship of potential difference to current

40. Identify the blueprint symbol for capacitors.
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Symbol
75 Ohms
Voltmeter

41. When reading resistance color codes - what does the fourth band indicate?
Tolerence
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Potential difference
Serial

42. What instrument measures voltage?
Opposition to electrical current
Cells can be connected together to make a battery
Voltmeter
Purging

43. What makes electrons flow?
Produce heat - light - or limit current to control it(all of the above)
Opposition to electrical current
Mutual induction
Potential difference

44. What results when current is run through a material with high resistance?
Potential difference - E*I - current times current change from point to point(all of the above)
First digit
Two
Heat and current control(both a and c)

45. How do you read resistor color codes?
Serial
Wire splices
Start with the band on the end and read to the center
Insulation resistance and Dielectric strength(Both A and B)

46. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Parallel
1/1000th of an inch
Voltmeter
Serial

47. What is a characteristic of insulators?
Symbol
Magnetic properties
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Resistance increases as the conductor length increases

48. What is a wire classification?
Bare - covered - insulated - stranded - cable(All of the above)
20%
Choke
Current change in a coil creates a magnetic change

49. What is dielectric strength?
Fixed - tapped - variable(all of the above)
How much potential difference can a material withstand before breaking down
Moving vehicles
High resistance

50. What is the name for electrical resistance of insulation?
Breakdown voltage
Insulation resistance
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
From the negative battery terminal to the positive terminal

Can you answer 50 questions in 15 minutes?

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Basic Electricity

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