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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. How do static charges distribute themselves?
High resistance
Plastic - Rubber - Friction(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Heat

2. Which of the following is a type of resistor?
Strength of the charge
From the negative battery terminal to the positive terminal
Fixed - tapped - variable(all of the above)
Plastic - Rubber - Friction(all of the above)

3. What instrument measures voltage?
Battery
From the negative battery terminal to the positive terminal
Tolerence
Voltmeter

4. How many kinds of poles do magnets have?
Fixed - tapped - variable(all of the above)
Two
American wire gauge(AWG)
A difference in potential energy

5. What is power?
The rate of doing work
Does not move
Electromagnetism
Potential difference - E*I - current times current change from point to point(all of the above)

6. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Fixed - Electrolytic - Variable(all of the above)
The direction the negative charge moves
Insulation resistance and Dielectric strength(Both A and B)
5%

7. What are the two generic methods to eliminate static electricity from metal objects?
Bonding and grounding
Battery
Opposition to electrical current
Electrical resistance against the flow of current

8. What does a first band of white mean?
Does not move
Fixed - tapped - variable(all of the above)
First digit is 9
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

9. What is a wire classification?
Mutual induction
Electrical resistance against the flow of current
Fixed - tapped - variable(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)

10. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
15 -000 ohms - 20%
Mutual induction
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)
10

11. Which of the following materials is NOT a good conductor?
Stores electrical charge
Porcelain
Battery
Symbol

12. Identify the general blueprint symbol for inductors.
Electromagnetism
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Symbol
Stranded

13. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Potential difference
Stranded
Area and spacing of capacitor - static current in the capacitor(both A and B)

14. Which type of cell can be recharged?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Electromagnetism
Secondary cell

15. What is a common measure of wire diameter?
Gauge number
The rate of doing work
Common - not rechargable - gradually discharges when in storage(All of the above)
Use an effect to produce another effect

16. What is the type of cable composed of many fine wires?
Relay
Opposes any change in the current flowing in a circuit
Stranded
Moving vehicles

17. What is the purpose of capacitors in electrical circuits?
Cables
Heat
Energy
Stores electrical charge

18. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
Series circuit
Does not move
Porcelain

19. What is a property of inductors in electrical circuits?
Unlike poles attract
Opposes any change in the current flowing in a circuit
Parallel circuit
First digit is 9

20. Where do the fingers point in both Left-Hand Rules?
Opposition to movement of free electrons
The direction of the magnetic field
Voltmeter
The rate of doing work

21. What is the purpose of resistors in electrical circuits?
Cells can be connected together to make a battery
Relationship between current and potential difference
Produce heat - light - or limit current to control it(all of the above)
Bonding and grounding

22. What is capacitance in electrical terms?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Series circuit
Ability to store an electric charge
Does not move

23. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Secondary cell
By their covering
20%
Potential difference

24. When reading resistance color codes - what does the first band indicate?
Alternating current
Choke
First digit
Porcelain

25. What does a third band of brown mean?
Resistance value can not be changed
10
How much potential difference can a material withstand before breaking down
Electromagnetism

26. What is a type of mechanical transducer?
Potential difference
Solenoid and Relay(both A and B)
Does not move
Cell

27. What are the common units of measurement for round and square conductor cross - sections?
Parallel circuit
Circular and square mills(Both A and B)
A material capable of carrying an electric current Silver - Copper - and Aluminum(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)

28. What is a type of capacitor?
1 watt
Fixed - Electrolytic - Variable(all of the above)
Cell
Area and spacing of capacitor - static current in the capacitor(both A and B)

29. What is a characteristic of insulators?
First digit is 9
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Fixed - Electrolytic - Variable(all of the above)
Voltmeter

30. What is the basic law of magnetic force?
Volts
From the negative battery terminal to the positive terminal
Unlike poles attract
Serial

31. The thermocouple uses which method for creating potential energy?
Cell
Heat
Opposition to movement of free electrons
A difference in potential energy

32. What do junction boxes protect?
DC flows continuously in one direction and AC potential difference and current both change direction
Energy
Chemical action
Wire splices

33. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Bare - covered - insulated - stranded - cable(All of the above)
Alternating current
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
12 volts

34. What is another name for an inductor?
Opposition to electrical current
Choke
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)
Current flows in one direction - potential differences across a load does not change(Both A and B)

35. What is a way to classify wires and cables?
Potential difference
Tolerence
By their covering
Start with the band on the end and read to the center

36. What is the unit of measurement of electrical current?
Serial
First digit
Area and spacing of capacitor - static current in the capacitor(both A and B)
Amperes

37. What is a common cause of static electricity in a shop?
Chemical action
Moving vehicles
DC current
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

38. What must be large enough to carry the largest current likely to occur?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Volts
By their covering
Grounding wire

39. What does resistance produce?
Heat
Battery
Silver
A magnetic field

40. What type of circuit has one path of follow through a load?
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)
How much potential difference can a material withstand before breaking down
Amperes
Series circuit

41. What does a moving charge produce?
A magnetic field
12 volts
Tolerence
Opposition to electrical current

42. What is a characteristic of a fixed resistor?
Serial
Two
First digit is 9
Resistance value can not be changed

43. What is true about a dry cell?
Potential difference - E*I - current times current change from point to point(all of the above)
15 -000 ohms - 20%
Strength of the charge
Common - not rechargable - gradually discharges when in storage(All of the above)

44. Given E=I X R and the following information - plug in the data and solve the problem for voltage. 0.015 ohms - 800 amps of current
Area and spacing of capacitor - static current in the capacitor(both A and B)
Chemical action
Volts
12 volts

45. What is resistance?
Opposes any change in the current flowing in a circuit
Opposition to movement of free electrons
First digit is 9
High resistance

46. What is induction?
First digit is 9
Opposition to electrical current
Current change in a coil creates a magnetic change
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

47. What is voltage?
Composition of the resistor
A difference in potential energy
Common - not rechargable - gradually discharges when in storage(All of the above)
Opposition to electrical current

48. A resistor is color coded brown - green - orange. What is its resistance?
1/1000th of an inch
Cables
15 -000 ohms - 20%
10

49. What is the name for electrical resistance of insulation?
Mutual induction
Purging
Insulation resistance
DC flows continuously in one direction and AC potential difference and current both change direction

50. What is the relationship between magnetism and electricity?
1/1000th of an inch
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)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)