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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 needed for electric heating elements and the filaments of light bulbs?
High resistance
DC flows continuously in one direction and AC potential difference and current both change direction
Purging
Circular and square mills(Both A and B)

2. What does a third band of brown mean?
10
Energy
Breakdown voltage
12 volts

3. What is a switch that operates by electricity?
Start with the band on the end and read to the center
Serial
Fixed - tapped - variable(all of the above)
Relay

4. What is a way to classify wires and cables?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
50 Ohms
By their covering
Grounding wire

5. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
High resistance
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
From the negative battery terminal to the positive terminal

6. What is resistance in electrical terms?
Ability to store an electric charge
Opposition to electrical current
Cables
1/1000th of an inch

7. What types of protective tapes are used?
Serial
Silver
12 volts
Plastic - Rubber - Friction(all of the above)

8. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
First digit is 9
From the negative battery terminal to the positive terminal
Produce heat - light - or limit current to control it(all of the above)

9. How do static charges distribute themselves?
A magnetic field
Relay
DC current
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

10. What is the unit of measurement of potential difference?
Heat and current control(both a and c)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Opposes any change in the current flowing in a circuit
Volts

11. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
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)
Serial
Gauge number

12. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Magnetic properties
DC current
Current change in a coil creates a magnetic change

13. 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
Opposes any change in the current flowing in a circuit
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)
Heat

14. What is the use of the electromagnet?
Ability to store an electric charge
Purging
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
By their covering

15. What is the purpose of capacitors in electrical circuits?
10%
Current flows in one direction - potential differences across a load does not change(Both A and B)
Stores electrical charge
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

16. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Series circuit
Alternating current
Electromagnetism
How much potential difference can a material withstand before breaking down

17. What is a characteristic of insulators?
Cells can be connected together to make a battery
Gauge number
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

18. What must be large enough to carry the largest current likely to occur?
From the negative battery terminal to the positive terminal
Heat
Grounding wire
Use an effect to produce another effect

19. When does a DC circuit oppose current flow?
First digit
Circular and square mills(Both A and B)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Use an effect to produce another effect

20. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Moving vehicles
Ohms
50 Ohms

21. What type of circuit has one path of follow through a load?
Breakdown voltage
Stores electrical charge
Series circuit
12 volts

22. When reading resistance color codes - what does the first band indicate?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Opposes any change in the current flowing in a circuit
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
First digit

23. What is a wire classification?
Voltage
Bare - covered - insulated - stranded - cable(All of the above)
A magnetic field
Wire splices

24. What can permanently break down a capacitor?
Breakdown voltage
50 Ohms
Strength of the charge
DC current

25. What are the names of two of the six primary methods of producing a voltage?
Battery
Amperes
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Cells can be connected together to make a battery

26. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Heat
Mutual induction
Grounding wire
Secondary cell

27. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Parallel
Fixed - tapped - variable(all of the above)
A magnetic field
Opposes any change in the current flowing in a circuit

28. How many kinds of poles do magnets have?
Unlike poles attract
Fixed - tapped - variable(all of the above)
Two
Strength of the charge

29. What is a common cause of static electricity in a shop?
Cells can be connected together to make a battery
Moving vehicles
Current flows in one direction - potential differences across a load does not change(Both A and B)
First digit

30. What is a DC circuit characteristic?
Alternating current
Potential difference
Serial
Current flows in one direction - potential differences across a load does not change(Both A and B)

31. What is a common form used in conductors?
Grounding wire
Cables
12 volts
Solenoid and Relay(both A and B)

32. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
5%
Potential difference - E*I - current times current change from point to point(all of the above)
Wire splices
Volts

33. What is a common measure of wire diameter?
Symbol
Amperes
Gauge number
20%

34. Which of the following materials is NOT a good conductor?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Porcelain
Insulation resistance and Dielectric strength(Both A and B)
Chemical action

35. Which type of cell can be recharged?
Circular and square mills(Both A and B)
Secondary cell
Series circuit
Electromagnetism

36. What determines the resistance of a resistor?
Composition of the resistor
Bonding and grounding
Symbol
Voltmeter

37. What are the common units of measurement for round and square conductor cross - sections?
Voltmeter
Circular and square mills(Both A and B)
Potential difference
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

38. What is the unit of measurement of electrical current?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Opposition to electrical current
Electromagnetic field
Amperes

39. What is the term for two or more cells attached together?
Secondary cell
Battery
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)
Breakdown voltage

40. What is a type of mechanical transducer?
A magnetic field
Secondary cell
Solenoid and Relay(both A and B)
Electrical resistance against the flow of current

41. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Bonding and grounding
Purging

42. What is voltage?
A difference in potential energy
Opposes any change in the current flowing in a circuit
Electromagnetic field
Ability to store an electric charge

43. What makes electrons flow?
Potential difference
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Battery

44. What are the two generic methods to eliminate static electricity from metal objects?
Relay
12 volts
Insulation resistance and Dielectric strength(Both A and B)
Bonding and grounding

45. What is the term for doing work at the rate of joule per second?
1 watt
How much potential difference can a material withstand before breaking down
Relay
Stores electrical charge

46. Where does the thumb point in both Left-Hand Rules?
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)
12 volts
The direction the negative charge moves
Two

47. What cannot be transformed to higher or lower potential differences?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Heat
DC current
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)

48. What do we call the ability to do work?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Energy
Current flows in one direction - potential differences across a load does not change(Both A and B)
First digit

49. What do junction boxes protect?
50 Ohms
1 watt
Opposes any change in the current flowing in a circuit
Wire splices

50. What is the relationship between magnetism and electricity?
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)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Fixed - tapped - variable(all of the above)
American wire gauge(AWG)