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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 the relationship of conductor size and length to resistance?
20%
Resistance increases as the conductor length increases
50 Ohms
Resistance value can not be changed

2. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
By their covering
Series circuit
Parallel
Electrical resistance against the flow of current

3. Where does the thumb point in both Left-Hand Rules?
--^V^V^V^---
The direction the negative charge moves
The relationship of potential difference to current
The direction of the magnetic field

4. What are the names of two of the six primary methods of producing a voltage?
Opposition to movement of free electrons
Potential difference
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Electromagnetism

5. What does a first band of white mean?
Gauge number
Fixed - Electrolytic - Variable(all of the above)
First digit is 9
Purging

6. What is the difference between AC and DC?
Ohms
DC flows continuously in one direction and AC potential difference and current both change direction
DC current
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

7. What is a type of capacitor?
American wire gauge(AWG)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Fixed - Electrolytic - Variable(all of the above)
Magnetic properties

8. Which of the following materials is NOT a good conductor?
Bonding and grounding
Porcelain
The direction the negative charge moves
Silver

9. What is the unit of measurement of resistance?
Porcelain
Ohms
Voltage
Plastic - Rubber - Friction(all of the above)

10. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Serial
Alternating current
Grounding wire
Stranded

11. What is the purpose of capacitors in electrical circuits?
Unlike poles attract
Serial
Opposes any change in the current flowing in a circuit
Stores electrical charge

12. What wire measurement is commonly used in the U.S.?
Electromagnetic field
American wire gauge(AWG)
Amperes
Solenoid and Relay(both A and B)

13. When does a DC circuit oppose current flow?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Insulation resistance
Bare - covered - insulated - stranded - cable(All of the above)
First digit is 9

14. What is power?
A magnetic field
The rate of doing work
20%
Stores electrical charge

15. What is voltage?
Alternating current
A difference in potential energy
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)

16. What is another name for an inductor?
High resistance
Choke
Symbol
10

17. When reading resistance color codes - what does the fourth band indicate?
Tolerence
Current flows in one direction - potential differences across a load does not change(Both A and B)
Serial
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

18. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Two
Chemical action

19. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Alternating current
Composition of the resistor
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Unlike poles attract

20. What do transducers do in electrical terms?
Use an effect to produce another effect
The direction of the magnetic field
Ohms
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)

21. What is a common cause of static electricity in a shop?
75 Ohms
Heat
Moving vehicles
The relationship of potential difference to current

22. 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
American wire gauge(AWG)
Symbol
Chemical action

23. What is a common measure of wire diameter?
The direction the negative charge moves
Gauge number
Ohms
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

24. What is the name for electrical resistance of insulation?
50 Ohms
Heat
Series circuit
Insulation resistance

25. What is the measure of potential difference?
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)
Parallel
Volts
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

26. What can permanently break down a capacitor?
Breakdown voltage
Opposes any change in the current flowing in a circuit
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

27. What determines whether a spark can be produced?
Start with the band on the end and read to the center
Strength of the charge
Opposition to movement of free electrons
Potential difference - E*I - current times current change from point to point(all of the above)

28. What is a characteristic of insulators?
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)
Stores electrical charge
By their covering

29. What is a common form used in conductors?
Serial
Magnetic properties
Cables
Use an effect to produce another effect

30. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Magnetic properties
5%
Heat
Purging

31. What is a conductor?
Silver
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Grounding wire
Potential difference

32. What is the relationship between cells and batteries?
Bonding and grounding
First digit is 9
Parallel
Cells can be connected together to make a battery

33. The thermocouple uses which method for creating potential energy?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Heat
Symbol
Fixed - Electrolytic - Variable(all of the above)

34. What do junction boxes protect?
Wire splices
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
DC current
Gauge number

35. What is an electromagnet?
Wire splices
Amperes
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Moving vehicles

36. What information do the Left-Hand Rules provide?
Porcelain
Choke
Volts
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

37. What type of circuit has two or more paths for current to follow?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Heat
Parallel circuit
Ohms

38. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
Gauge number
Use an effect to produce another effect
10%

39. What is a switch that operates by electricity?
Energy
Tolerence
Relay
10

40. What is the type of cable composed of many fine wires?
Ohms
Stranded
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Volts

41. What must be large enough to carry the largest current likely to occur?
Voltage
Chemical action
Grounding wire
Resistance increases as the conductor length increases

42. What results when current is run through a material with high resistance?
12 volts
Heat and current control(both a and c)
Opposes any change in the current flowing in a circuit
Series circuit

43. Identify the general blueprint symbol for inductors.
Battery
Symbol
Electromagnetic field
Insulation resistance and Dielectric strength(Both A and B)

44. What are the common units of measurement for round and square conductor cross - sections?
Resistance increases as the conductor length increases
Insulation resistance and Dielectric strength(Both A and B)
Circular and square mills(Both A and B)
Fixed - Electrolytic - Variable(all of the above)

45. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
15 -000 ohms - 20%
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)
Potential difference

46. What is a wire classification?
Voltmeter
Bare - covered - insulated - stranded - cable(All of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Insulation resistance

47. What is a characteristic of a fixed resistor?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Solenoid and Relay(both A and B)
Potential difference - E*I - current times current change from point to point(all of the above)
Resistance value can not be changed

48. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Cables
75 Ohms
20%
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

49. What does an object have if a magnetic field acts on it?
DC current
Magnetic properties
--^V^V^V^---
15 -000 ohms - 20%

50. What determines the resistance of a resistor?
Composition of the resistor
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)
Insulation resistance and Dielectric strength(Both A and B)
Series circuit