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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 instrument measures voltage?
Stores electrical charge
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Voltmeter
Relationship between current and potential difference

2. What do we call the ability to do work?
Symbol
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Alternating current
Energy

3. What information do the Left-Hand Rules provide?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
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)

4. What is another name for an inductor?
Choke
Moving vehicles
High resistance
50 Ohms

5. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
Parallel circuit
Battery
Solenoid and Relay(both A and B)

6. When reading resistance color codes - what does the first band indicate?
Circular and square mills(Both A and B)
First digit
First digit is 9
Volts

7. What do electrical charges need to cause a fire or explosion?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Fixed - Electrolytic - Variable(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Heat

8. What is a common measure of wire diameter?
Secondary cell
Gauge number
Magnetic properties
75 Ohms

9. Where does the thumb point in both Left-Hand Rules?
Volts
Electrical resistance against the flow of current
The direction the negative charge moves
Cables

10. What is an arrangement of materials that create a potential difference by chemistry?
Opposes any change in the current flowing in a circuit
Cell
Heat
Unlike poles attract

11. What are the common units of measurement for round and square conductor cross - sections?
Fixed - tapped - variable(all of the above)
Circular and square mills(Both A and B)
Resistance increases as the conductor length increases
Produce heat - light - or limit current to control it(all of the above)

12. What is the name for electrical resistance of insulation?
--^V^V^V^---
Insulation resistance
Secondary cell
American wire gauge(AWG)

13. What is a property of inductors in electrical circuits?
Opposes any change in the current flowing in a circuit
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
First digit
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

14. What is a common form used in conductors?
By their covering
Cables
DC flows continuously in one direction and AC potential difference and current both change direction
Series circuit

15. What are the two generic methods to eliminate static electricity from metal objects?
Bonding and grounding
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Parallel circuit
Cells can be connected together to make a battery

16. What cannot be transformed to higher or lower potential differences?
Bare - covered - insulated - stranded - cable(All of the above)
DC current
Area and spacing of capacitor - static current in the capacitor(both A and B)
Produce heat - light - or limit current to control it(all of the above)

17. What does a first band of white mean?
Voltmeter
Volts
Grounding wire
First digit is 9

18. What is a type of mechanical transducer?
75 Ohms
Ability to store an electric charge
Solenoid and Relay(both A and B)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

19. Which type of cell can be recharged?
Heat
Wire splices
Area and spacing of capacitor - static current in the capacitor(both A and B)
Secondary cell

20. What is voltage?
Stranded
A difference in potential energy
Insulation resistance
Relay

21. What is a conductor?
Serial
A difference in potential energy
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Grounding wire

22. The dry cell is what method for creating potential energy?
Electrical resistance against the flow of current
First digit
Chemical action
15 -000 ohms - 20%

23. To what measurement do the conductor mills refer?
1/1000th of an inch
Magnetic properties
Resistance increases as the conductor length increases
Electromagnetism

24. What is resistance?
How much potential difference can a material withstand before breaking down
--^V^V^V^---
Opposition to movement of free electrons
Fixed - Electrolytic - Variable(all of the above)

25. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Electromagnetic field
Purging
DC current
Parallel

26. Identify the blueprint symbol for capacitors.
1/1000th of an inch
Porcelain
The direction of the magnetic field
Symbol

27. Identify the blueprint symbol for resistors.
Potential difference
Current flows in one direction - potential differences across a load does not change(Both A and B)
--^V^V^V^---
Relationship between current and potential difference

28. What must be large enough to carry the largest current likely to occur?
Grounding wire
Produce heat - light - or limit current to control it(all of the above)
Series circuit
Ability to store an electric charge

29. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Silver
20%
American wire gauge(AWG)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

30. The generator is what method of creating potential energy?
Insulation resistance and Dielectric strength(Both A and B)
Parallel
Electromagnetism
Stores electrical charge

31. Which material has the lowest resistance at ordinary temperatures?
Electrical resistance against the flow of current
Series circuit
A magnetic field
Silver

32. When reading resistance color codes - what does the fourth band indicate?
Energy
Voltmeter
Breakdown voltage
Tolerence

33. How many kinds of poles do magnets have?
Porcelain
Secondary cell
Two
Ability to store an electric charge

34. What type of circuit has one path of follow through a load?
First digit
Grounding wire
Series circuit
Choke

35. Identify the general blueprint symbol for inductors.
Symbol
Resistance increases as the conductor length increases
1 watt
American wire gauge(AWG)

36. What is the measure of potential difference?
Parallel circuit
High resistance
Volts
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

37. What does an object have if a magnetic field acts on it?
Opposition to electrical current
20%
Magnetic properties
Gauge number

38. What is the term for doing work at the rate of joule per second?
Produce heat - light - or limit current to control it(all of the above)
1 watt
75 Ohms
Magnetic properties

39. What is insulation resistance?
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)
Tolerence
Electrical resistance against the flow of current
Gauge number

40. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
Energy
Fixed - tapped - variable(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)

41. What is the purpose of resistors in electrical circuits?
Opposes any change in the current flowing in a circuit
Produce heat - light - or limit current to control it(all of the above)
Opposition to movement of free electrons
Fixed - Electrolytic - Variable(all of the above)

42. What are the names of two of the six primary methods of producing a voltage?
Fixed - tapped - variable(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Start with the band on the end and read to the center
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

43. What is the relationship between cells and batteries?
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)
Cells can be connected together to make a battery
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)

44. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
Unlike poles attract
Electromagnetism
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

45. What determines whether a spark can be produced?
Strength of the charge
Circular and square mills(Both A and B)
Opposition to electrical current
Potential difference

46. What is a wire classification?
Electrical resistance against the flow of current
DC flows continuously in one direction and AC potential difference and current both change direction
Bare - covered - insulated - stranded - cable(All of the above)
Electromagnetic field

47. What is induction?
Current change in a coil creates a magnetic change
Heat and current control(both a and c)
Purging
A difference in potential energy

48. What is a characteristic of insulators?
DC current
Electromagnetic field
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Does not move

49. What is resistance in electrical terms?
Opposition to electrical current
Potential difference - E*I - current times current change from point to point(all of the above)
Voltmeter
Cells can be connected together to make a battery

50. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Serial
From the negative battery terminal to the positive terminal
Unlike poles attract
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

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