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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 determines the resistance of a resistor?
Ohms
Composition of the resistor
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Potential difference

2. What is a rigid metal conduit?
A difference in potential energy
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Cables
Circular and square mills(Both A and B)

3. What is a wire classification?
A magnetic field
Opposition to movement of free electrons
Bare - covered - insulated - stranded - cable(All of the above)
A difference in potential energy

4. To what measurement do the conductor mills refer?
75 Ohms
Voltage
1/1000th of an inch
Potential difference

5. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
By their covering
1/1000th of an inch
Solenoid and Relay(both A and B)
10%

6. What is the term for doing work at the rate of joule per second?
A magnetic field
Battery
1 watt
Moving vehicles

7. What is the purpose of a raceway?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Produce heat - light - or limit current to control it(all of the above)
Insulation resistance and Dielectric strength(Both A and B)

8. What instrument measures voltage?
Ohms
Grounding wire
Voltmeter
Stores electrical charge

9. Identify the blueprint symbol for capacitors.
12 volts
20%
Bare - covered - insulated - stranded - cable(All of the above)
Symbol

10. What do transducers do in electrical terms?
Use an effect to produce another effect
12 volts
From the negative battery terminal to the positive terminal
Produce heat - light - or limit current to control it(all of the above)

11. How is the heat production measured in a resistor?
Potential difference - E*I - current times current change from point to point(all of the above)
The direction the negative charge moves
Plastic - Rubber - Friction(all of the above)
The rate of doing work

12. What type of circuit has one path of follow through a load?
Volts
Unlike poles attract
Series circuit
Electromagnetic field

13. When reading resistance color codes - what does the fourth band indicate?
Volts
10
Tolerence
1 watt

14. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Cell
50 Ohms
Grounding wire
From the negative battery terminal to the positive terminal

15. What is the relationship between magnetism and electricity?
Bonding and grounding
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
Choke

16. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
American wire gauge(AWG)
Voltage
Purging

17. What is insulation resistance?
Cables
Grounding wire
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)
Electrical resistance against the flow of current

18. 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
Wire splices
12 volts
20%
Fixed - Electrolytic - Variable(all of the above)

19. What is the purpose of resistors in electrical circuits?
Composition of the resistor
Produce heat - light - or limit current to control it(all of the above)
Parallel circuit
Purging

20. Identify the general blueprint symbol for inductors.
75 Ohms
1 watt
Symbol
First digit

21. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
Current flows in one direction - potential differences across a load does not change(Both A and B)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Produce heat - light - or limit current to control it(all of the above)

22. How is capacitance determined?
Relationship between current and potential difference
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
The relationship of potential difference to current

23. What do we call the ability to do work?
Use an effect to produce another effect
Energy
A difference in potential energy
Voltage

24. What types of protective tapes are used?
Battery
A difference in potential energy
Plastic - Rubber - Friction(all of the above)
Cell

25. What does Ohm's Law represent?
Relationship between current and potential difference
American wire gauge(AWG)
A magnetic field
Relay

26. What can permanently break down a capacitor?
Electrical resistance against the flow of current
DC current
Breakdown voltage
Cell

27. What is the difference between AC and DC?
Series circuit
Grounding wire
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)
DC flows continuously in one direction and AC potential difference and current both change direction

28. What wire measurement is commonly used in the U.S.?
Symbol
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Amperes
American wire gauge(AWG)

29. What is the purpose of capacitors in electrical circuits?
5%
First digit is 9
Bare - covered - insulated - stranded - cable(All of the above)
Stores electrical charge

30. What is needed for electric heating elements and the filaments of light bulbs?
Wire splices
High resistance
Cables
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

31. What is another name for an inductor?
Cell
10%
Choke
Relay

32. Which type of cell can be recharged?
Secondary cell
A magnetic field
Common - not rechargable - gradually discharges when in storage(All of the above)
1 watt

33. What determines whether a spark can be produced?
Strength of the charge
50 Ohms
Does not move
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

34. What makes electrons flow?
Potential difference
Relay
Common - not rechargable - gradually discharges when in storage(All of the above)
First digit is 9

35. Why is the transformer important to AC electricity?

36. What is a common cause of static electricity in a shop?
Moving vehicles
American wire gauge(AWG)
15 -000 ohms - 20%
Cell

37. Where do the fingers point in both Left-Hand Rules?
By their covering
Alternating current
The direction of the magnetic field
Produce heat - light - or limit current to control it(all of the above)

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

39. What is the measure of potential difference?
Cables
Volts
Magnetic properties
Stranded

40. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Composition of the resistor
Symbol
Amperes
Alternating current

41. How do static charges distribute themselves?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Area and spacing of capacitor - static current in the capacitor(both A and B)
First digit is 9
Parallel circuit

42. What does a first band of white mean?
First digit is 9
50 Ohms
Ability to store an electric charge
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

43. What is dielectric strength?
Parallel circuit
How much potential difference can a material withstand before breaking down
A magnetic field
Insulation resistance

44. What is the term for two or more cells attached together?
Heat
Fixed - Electrolytic - Variable(all of the above)
Battery
Opposition to movement of free electrons

45. What is a DC circuit characteristic?
Resistance value can not be changed
Current flows in one direction - potential differences across a load does not change(Both A and B)
Choke
Current change in a coil creates a magnetic change

46. What is induction?
Insulation resistance and Dielectric strength(Both A and B)
From the negative battery terminal to the positive terminal
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Current change in a coil creates a magnetic change

47. What is the name for electrical resistance of insulation?
Symbol
Heat and current control(both a and c)
Insulation resistance
The rate of doing work

48. What does a third band of brown mean?
Circular and square mills(Both A and B)
10
The rate of doing work
Ohms

49. When does a DC circuit oppose current flow?
Chemical action
Magnetic properties
How much potential difference can a material withstand before breaking down
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

50. What do electrical charges need to cause a fire or explosion?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Chemical action