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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 common measure of wire diameter?
Gauge number
Fixed - tapped - variable(all of the above)
Tolerence
First digit

2. The generator is what method of creating potential energy?
Grounding wire
10
Electromagnetism
Potential difference - E*I - current times current change from point to point(all of the above)

3. Identify the blueprint symbol for resistors.
--^V^V^V^---
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Breakdown voltage
Unlike poles attract

4. What makes electrons flow?
Insulation resistance
Potential difference
Relationship between current and potential difference
Wire splices

5. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Use an effect to produce another effect
Mutual induction

6. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Unlike poles attract
A difference in potential energy
1/1000th of an inch
Alternating current

7. Which material has the lowest resistance at ordinary temperatures?
Silver
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)
Ability to store an electric charge
Porcelain

8. What is the type of cable composed of many fine wires?
Energy
Stranded
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Circular and square mills(Both A and B)

9. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
Insulation resistance and Dielectric strength(Both A and B)
Parallel circuit
20%

10. What wire measurement is commonly used in the U.S.?
Electromagnetism
American wire gauge(AWG)
Bare - covered - insulated - stranded - cable(All of the above)
Solenoid and Relay(both A and B)

11. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
Purging
12 volts
--^V^V^V^---

12. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Ability to store an electric charge
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Magnetic properties
Voltage

13. What is the unit of measurement of electrical current?
Ohms
Amperes
Circular and square mills(Both A and B)
Tolerence

14. What do junction boxes protect?
Parallel
Wire splices
Silver
Volts

15. What can permanently break down a capacitor?
Electromagnetism
Breakdown voltage
Voltage
Does not move

16. What does a first band of white mean?
1/1000th of an inch
Mutual induction
First digit is 9
--^V^V^V^---

17. What do we call the ability to do work?
Energy
DC current
15 -000 ohms - 20%
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

18. What does a moving charge produce?
A magnetic field
Start with the band on the end and read to the center
Use an effect to produce another effect
From the negative battery terminal to the positive terminal

19. What does Ohm's Law represent?
Potential difference - E*I - current times current change from point to point(all of the above)
Relationship between current and potential difference
Ability to store an electric charge
Gauge number

20. Why is the transformer important to AC electricity?

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21. What does an object have if a magnetic field acts on it?
High resistance
Magnetic properties
Composition of the resistor
Secondary cell

22. What is the relationship between magnetism and electricity?
10
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)
The direction of the magnetic field
American wire gauge(AWG)

23. What are the two generic methods to eliminate static electricity from metal objects?
Electromagnetism
Bonding and grounding
Parallel
15 -000 ohms - 20%

24. When reading resistance color codes - what does the fourth band indicate?
Tolerence
Stores electrical charge
Moving vehicles
Opposes any change in the current flowing in a circuit

25. How many kinds of poles do magnets have?
From the negative battery terminal to the positive terminal
The direction of the magnetic field
Two
Ability to store an electric charge

26. What is a type of mechanical transducer?
Parallel circuit
Use an effect to produce another effect
Composition of the resistor
Solenoid and Relay(both A and B)

27. Where does the thumb point in both Left-Hand Rules?
The direction the negative charge moves
Heat
Strength of the charge
The rate of doing work

28. What is power?
DC current
Resistance value can not be changed
The rate of doing work
First digit is 9

29. What is a rigid metal conduit?
1/1000th of an inch
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Energy
Potential difference

30. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Solenoid and Relay(both A and B)
Heat
Cables

31. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Porcelain
20%
Common - not rechargable - gradually discharges when in storage(All of the above)
Cables

32. The dry cell is what method for creating potential energy?
Electromagnetic field
Porcelain
Chemical action
75 Ohms

33. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
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)
Parallel
Resistance value can not be changed
Solenoid and Relay(both A and B)

34. 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
Volts
75 Ohms
Insulation resistance
Energy

35. What is a common cause of static electricity in a shop?
Moving vehicles
Common - not rechargable - gradually discharges when in storage(All of the above)
Stranded
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)

36. What is resistance in electrical terms?
Opposition to electrical current
By their covering
Symbol
American wire gauge(AWG)

37. What is insulation resistance?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
The relationship of potential difference to current
Electrical resistance against the flow of current
10

38. What is the use of the electromagnet?
Strength of the charge
Tolerence
Volts
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

39. What is a characteristic of insulators?
75 Ohms
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Moving vehicles
Silver

40. What is a type of capacitor?
Electrical resistance against the flow of current
Magnetic properties
Fixed - Electrolytic - Variable(all of the above)
Opposes any change in the current flowing in a circuit

41. What is needed for electric heating elements and the filaments of light bulbs?
High resistance
Bare - covered - insulated - stranded - cable(All of the above)
1 watt
Amperes

42. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Tolerence
First digit is 9
5%
Wire splices

43. Identify the general blueprint symbol for inductors.
Current flows in one direction - potential differences across a load does not change(Both A and B)
Symbol
Grounding wire
Porcelain

44. What is a characteristic of a fixed resistor?
Resistance value can not be changed
Common - not rechargable - gradually discharges when in storage(All of the above)
Strength of the charge
Potential difference - E*I - current times current change from point to point(all of the above)

45. What instrument measures voltage?
Heat and current control(both a and c)
Voltmeter
Ohms
Common - not rechargable - gradually discharges when in storage(All of the above)

46. What cannot be transformed to higher or lower potential differences?
Ability to store an electric charge
DC current
The direction of the magnetic field
Cells can be connected together to make a battery

47. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Relationship between current and potential difference
Heat
Amperes
Purging

48. What are the names of two of the six primary methods of producing a voltage?
Voltage
Opposition to electrical current
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)

49. What is another name for an inductor?
Solenoid and Relay(both A and B)
Cells can be connected together to make a battery
Serial
Choke

50. Which of the following materials is NOT a good conductor?
Porcelain
Volts
Area and spacing of capacitor - static current in the capacitor(both A and B)
The direction the negative charge moves