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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 is the type of cable composed of many fine wires?
Tolerence
The rate of doing work
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Stranded

2. What is a switch that operates by electricity?
Relay
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Voltmeter

3. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
Electrical resistance against the flow of current
Parallel

4. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Volts
Magnetic properties
Symbol

5. What is a DC circuit characteristic?
From the negative battery terminal to the positive terminal
Unlike poles attract
Battery
Current flows in one direction - potential differences across a load does not change(Both A and B)

6. How do you read resistor color codes?
A magnetic field
Does not move
Start with the band on the end and read to the center
Produce heat - light - or limit current to control it(all of the above)

7. What are the common units of measurement for round and square conductor cross - sections?
Circular and square mills(Both A and B)
The relationship of potential difference to current
From the negative battery terminal to the positive terminal
Grounding wire

8. What is needed for electric heating elements and the filaments of light bulbs?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Opposes any change in the current flowing in a circuit
High resistance
Cell

9. What is another name for an inductor?
Breakdown voltage
Ohms
Choke
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

10. Identify the blueprint symbol for resistors.
A magnetic field
The direction of the magnetic field
--^V^V^V^---
Circular and square mills(Both A and B)

11. What does Ohm's Law represent?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Relationship between current and potential difference
Heat

12. How do static charges distribute themselves?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Electromagnetic field
Choke
Electrical resistance against the flow of current

13. How is the heat production measured in a resistor?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)
Circular and square mills(Both A and B)
Chemical action

14. What is the unit of measurement of resistance?
Ohms
The rate of doing work
Battery
Cables

15. To what measurement do the conductor mills refer?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Parallel circuit
1/1000th of an inch
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

16. What are the two generic methods to eliminate static electricity from metal objects?
Amperes
12 volts
Bonding and grounding
First digit is 9

17. What information do the Left-Hand Rules provide?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Cells can be connected together to make a battery
Gauge number
Current change in a coil creates a magnetic change

18. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
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)
Volts
How much potential difference can a material withstand before breaking down

19. What do junction boxes protect?
The rate of doing work
DC flows continuously in one direction and AC potential difference and current both change direction
Wire splices
Opposes any change in the current flowing in a circuit

20. Where do the fingers point in both Left-Hand Rules?
The rate of doing work
The direction of the magnetic field
Gauge number
Strength of the charge

21. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
75 Ohms
Voltage
Symbol
Moving vehicles

22. What makes electrons flow?
75 Ohms
Potential difference
Use an effect to produce another effect
Composition of the resistor

23. What determines whether a spark can be produced?
Strength of the charge
Parallel
Potential difference - E*I - current times current change from point to point(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

24. Why is the transformer important to AC electricity?

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25. What does an object have if a magnetic field acts on it?
Amperes
Magnetic properties
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
A magnetic field

26. Which way is the current going in the circuit shown?(electron flow)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
20%
From the negative battery terminal to the positive terminal
Serial

27. What is dielectric strength?
Voltmeter
Unlike poles attract
1/1000th of an inch
How much potential difference can a material withstand before breaking down

28. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Energy
Purging
Ability to store an electric charge
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

29. What does resistance produce?
1/1000th of an inch
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Heat
Voltage

30. A resistor is color coded brown - green - orange. What is its resistance?
Opposes any change in the current flowing in a circuit
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
15 -000 ohms - 20%
Circular and square mills(Both A and B)

31. What is a property of inductors in electrical circuits?
Opposes any change in the current flowing in a circuit
Heat
Symbol
Produce heat - light - or limit current to control it(all of the above)

32. What results when current is run through a material with high resistance?
By their covering
Produce heat - light - or limit current to control it(all of the above)
Heat and current control(both a and c)
Chemical action

33. What is the name for electrical resistance of insulation?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Symbol
A magnetic field
Insulation resistance

34. What is resistance?
Energy
Opposition to movement of free electrons
Relay
Mutual induction

35. The generator is what method of creating potential energy?
Electromagnetism
Volts
Does not move
Mutual induction

36. What is the measure of potential difference?
Volts
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Serial
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

37. What is power?
The rate of doing work
Gauge number
Purging
Choke

38. What is induction?
20%
75 Ohms
Current change in a coil creates a magnetic change
Electrical resistance against the flow of current

39. What is an arrangement of materials that create a potential difference by chemistry?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Purging
First digit is 9
Cell

40. What does static electricity do?
75 Ohms
Does not move
Unlike poles attract
From the negative battery terminal to the positive terminal

41. What makes electrons flow?
Fixed - Electrolytic - Variable(all of the above)
75 Ohms
A difference in potential energy
Potential difference

42. What do transducers do in electrical terms?
Voltmeter
Symbol
Use an effect to produce another effect
Stranded

43. What determines the resistance of a resistor?
Composition of the resistor
Choke
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

44. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Parallel
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
The rate of doing work
Wire splices

45. What must be large enough to carry the largest current likely to occur?
Grounding wire
The direction the negative charge moves
15 -000 ohms - 20%
Fixed - tapped - variable(all of the above)

46. What is voltage?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
5%
A difference in potential energy
Voltage

47. When reading resistance color codes - what does the fourth band indicate?
Tolerence
Heat and current control(both a and c)
Cells can be connected together to make a battery
A difference in potential energy

48. The thermocouple uses which method for creating potential energy?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Heat
Gauge number
Parallel

49. When reading resistance color codes - what does the first band indicate?
Electrical resistance against the flow of current
Cell
Amperes
First digit

50. Where does the thumb point in both Left-Hand Rules?
The direction the negative charge moves
Fixed - tapped - variable(all of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

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Basic Electricity

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