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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 a switch that operates by electricity?
10
Relay
First digit
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

2. What is a way to classify wires and cables?
Voltmeter
Current change in a coil creates a magnetic change
By their covering
Mutual induction

3. What are the names of two of the six primary methods of producing a voltage?
Mutual induction
High resistance
Relationship between current and potential difference
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

4. What can permanently break down a capacitor?
Breakdown voltage
Magnetic properties
DC flows continuously in one direction and AC potential difference and current both change direction
Use an effect to produce another effect

5. What type of circuit has two or more paths for current to follow?
Symbol
Grounding wire
Parallel circuit
Current change in a coil creates a magnetic change

6. What is voltage?
A difference in potential energy
10%
Cell
Battery

7. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
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
Grounding wire

8. What is the use of the electromagnet?
A difference in potential energy
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)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Potential difference

9. Why is the transformer important to AC electricity?

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10. Which way is the current going in the circuit shown?(electron flow)
Breakdown voltage
Current flows in one direction - potential differences across a load does not change(Both A and B)
Symbol
From the negative battery terminal to the positive terminal

11. What is the term for doing work at the rate of joule per second?
Ohms
1 watt
Current flows in one direction - potential differences across a load does not change(Both A and B)
Volts

12. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
1/1000th of an inch
Volts
Current change in a coil creates a magnetic change

13. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Parallel
Symbol
Ability to store an electric charge

14. What determines whether a spark can be produced?
Strength of the charge
Ability to store an electric charge
Insulation resistance and Dielectric strength(Both A and B)
Voltmeter

15. What is a common form used in conductors?
Mutual induction
Cables
Choke
Common - not rechargable - gradually discharges when in storage(All of the above)

16. What is insulation resistance?
Serial
Amperes
Potential difference
Electrical resistance against the flow of current

17. What is a conductor?
Breakdown voltage
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)
From the negative battery terminal to the positive terminal

18. What does static electricity do?
Does not move
Battery
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Grounding wire

19. What are the common units of measurement for round and square conductor cross - sections?
Potential difference - E*I - current times current change from point to point(all of the above)
Fixed - Electrolytic - Variable(all of the above)
Circular and square mills(Both A and B)
Bonding and grounding

20. What does a moving charge produce?
A magnetic field
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Relay
Porcelain

21. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Parallel
DC flows continuously in one direction and AC potential difference and current both change direction
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

22. Which of the following materials is NOT a good conductor?
Porcelain
Plastic - Rubber - Friction(all of the above)
50 Ohms
Current change in a coil creates a magnetic change

23. What is a wire classification?
Ohms
10%
Bare - covered - insulated - stranded - cable(All of the above)
Alternating current

24. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
Wire splices
Heat and current control(both a and c)
Voltage

25. What is dielectric strength?
Heat and current control(both a and c)
12 volts
75 Ohms
How much potential difference can a material withstand before breaking down

26. Identify the blueprint symbol for resistors.
1 watt
--^V^V^V^---
Opposes any change in the current flowing in a circuit
Current change in a coil creates a magnetic change

27. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10%
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)
Gauge number
Volts

28. Identify the general blueprint symbol for inductors.
Moving vehicles
Symbol
Stores electrical charge
Breakdown voltage

29. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
5%
--^V^V^V^---
Silver

30. When reading resistance color codes - what does the fourth band indicate?
Tolerence
12 volts
Produce heat - light - or limit current to control it(all of the above)
Ohms

31. What is the relationship between magnetism and electricity?
Relay
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
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)
Wire splices

32. What is a common cause of static electricity in a shop?
Strength of the charge
Moving vehicles
Electrical resistance against the flow of current
50 Ohms

33. What is another name for an inductor?
Potential difference
Bonding and grounding
Choke
Circular and square mills(Both A and B)

34. Where do the fingers point in both Left-Hand Rules?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Symbol
American wire gauge(AWG)
The direction of the magnetic field

35. What is the unit of measurement of electrical current?
Heat
5%
Amperes
Does not move

36. What makes electrons flow?
50 Ohms
Alternating current
A difference in potential energy
Potential difference

37. What is the relationship of conductor size and length to resistance?
Porcelain
Amperes
Resistance increases as the conductor length increases
Potential difference - E*I - current times current change from point to point(all of the above)

38. What does a third band of brown mean?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
10
Silver
Gauge number

39. Where does the thumb point in both Left-Hand Rules?
Serial
Current flows in one direction - potential differences across a load does not change(Both A and B)
The direction the negative charge moves
Ohms

40. What do we call the ability to do work?
Parallel
Energy
Bonding and grounding
Fixed - tapped - variable(all of the above)

41. What information do the Left-Hand Rules provide?
Cell
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)
Electrical resistance against the flow of current

42. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Resistance value can not be changed
The direction of the magnetic field
Heat

43. What does Ohm's Law represent?
Relationship between current and potential difference
Start with the band on the end and read to the center
75 Ohms
Heat

44. What determines the resistance of a resistor?
1/1000th of an inch
First digit is 9
Choke
Composition of the resistor

45. How many kinds of poles do magnets have?
DC current
Two
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)
20%

46. What is the name for electrical resistance of insulation?
Insulation resistance
Secondary cell
Ohms
12 volts

47. What does resistance produce?
Heat
1 watt
A magnetic field
Volts

48. To what measurement do the conductor mills refer?
Alternating current
Symbol
1/1000th of an inch
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

49. What is the unit of measurement of resistance?
Electromagnetic field
Plastic - Rubber - Friction(all of the above)
Ohms
Serial

50. What does a first band of white mean?
First digit is 9
High resistance
Solenoid and Relay(both A and B)
Magnetic properties