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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. The dry cell is what method for creating potential energy?
Unlike poles attract
By their covering
Series circuit
Chemical action

2. What does a third band of brown mean?
1/1000th of an inch
Insulation resistance and Dielectric strength(Both A and B)
10
Cell

3. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
10
5%
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
By their covering

4. What do transducers do in electrical terms?
Energy
1 watt
Use an effect to produce another effect
Unlike poles attract

5. Why is the transformer important to AC electricity?

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6. What do we call the ability to do work?
Energy
15 -000 ohms - 20%
Does not move
Fixed - tapped - variable(all of the above)

7. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
20%
Current flows in one direction - potential differences across a load does not change(Both A and B)
Symbol
Voltage

8. What is an arrangement of materials that create a potential difference by chemistry?
Fixed - Electrolytic - Variable(all of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Potential difference - E*I - current times current change from point to point(all of the above)
Cell

9. What results when current is run through a material with high resistance?
Current change in a coil creates a magnetic change
Heat and current control(both a and c)
The direction the negative charge moves
Mutual induction

10. What do junction boxes protect?
American wire gauge(AWG)
20%
Grounding wire
Wire splices

11. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)
Porcelain
Battery

12. What is a type of mechanical transducer?
Parallel
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Solenoid and Relay(both A and B)
Bonding and grounding

13. What is the fundamental property of insulators?
Current change in a coil creates a magnetic change
Insulation resistance and Dielectric strength(Both A and B)
Does not move
Electromagnetic field

14. Which way is the current going in the circuit shown?(electron flow)
From the negative battery terminal to the positive terminal
Fixed - Electrolytic - Variable(all of the above)
Unlike poles attract
Serial

15. What is a rigid metal conduit?
Moving vehicles
Gauge number
Potential difference
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

16. To what measurement do the conductor mills refer?
1/1000th of an inch
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Gauge number
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

17. What does static electricity do?
Serial
Does not move
Fixed - tapped - variable(all of the above)
Volts

18. What is an electromagnet?
High resistance
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Symbol
First digit

19. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Purging
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)
Bare - covered - insulated - stranded - cable(All of the above)

20. What is a wire classification?
Strength of the charge
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Bare - covered - insulated - stranded - cable(All of the above)
Purging

21. What is the unit of measurement of potential difference?
Potential difference
Wire splices
Volts
Symbol

22. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Common - not rechargable - gradually discharges when in storage(All of the above)
Voltage
A magnetic field
5%

23. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Mutual induction
Serial

24. What are the two generic methods to eliminate static electricity from metal objects?
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)
Bonding and grounding
First digit is 9
Current change in a coil creates a magnetic change

25. What types of protective tapes are used?
Circular and square mills(Both A and B)
DC flows continuously in one direction and AC potential difference and current both change direction
Plastic - Rubber - Friction(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)

26. Which type of cell can be recharged?
Fixed - Electrolytic - Variable(all of the above)
Insulation resistance and Dielectric strength(Both A and B)
Cables
Secondary cell

27. What is capacitance in electrical terms?
Ability to store an electric charge
1/1000th of an inch
Bonding and grounding
DC current

28. What makes electrons flow?
Tolerence
The relationship of potential difference to current
How much potential difference can a material withstand before breaking down
Potential difference

29. What does Ohm's Law represent?
Moving vehicles
Relationship between current and potential difference
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
The direction of the magnetic field

30. What is needed for electric heating elements and the filaments of light bulbs?
Produce heat - light - or limit current to control it(all of the above)
Solenoid and Relay(both A and B)
High resistance
Chemical action

31. What is insulation resistance?
Symbol
Electrical resistance against the flow of current
Resistance value can not be changed
Mutual induction

32. What makes electrons flow?
Does not move
Use an effect to produce another effect
Stranded
Potential difference

33. What instrument measures voltage?
The direction of the magnetic field
Voltmeter
10
First digit is 9

34. What determines whether a spark can be produced?
Strength of the charge
Two
Fixed - tapped - variable(all of the above)
High resistance

35. When reading resistance color codes - what does the fourth band indicate?
Alternating current
Symbol
Opposes any change in the current flowing in a circuit
Tolerence

36. What is the relationship between cells and batteries?
Volts
Ability to store an electric charge
Cells can be connected together to make a battery
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

37. Where does the thumb point in both Left-Hand Rules?
Volts
The direction the negative charge moves
5%
Common - not rechargable - gradually discharges when in storage(All of the above)

38. What is induction?
Use an effect to produce another effect
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Current change in a coil creates a magnetic change
Unlike poles attract

39. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Ability to store an electric charge
Start with the band on the end and read to the center
Stranded
Alternating current

40. What is resistance in electrical terms?
Opposition to electrical current
Choke
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
The rate of doing work

41. Which of the following is a type of resistor?
Circular and square mills(Both A and B)
The relationship of potential difference to current
Fixed - tapped - variable(all of the above)
Insulation resistance and Dielectric strength(Both A and B)

42. What is power?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
The rate of doing work
DC flows continuously in one direction and AC potential difference and current both change direction
By their covering

43. What information do the Left-Hand Rules provide?
Amperes
DC current
Heat
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

44. The generator is what method of creating potential energy?
DC current
Electromagnetism
Chemical action
Battery

45. What is the use of the electromagnet?
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)
Breakdown voltage
Volts
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

46. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
The rate of doing work
Parallel
Breakdown voltage
15 -000 ohms - 20%

47. What is a common measure of wire diameter?
Gauge number
Cells can be connected together to make a battery
A magnetic field
Ohms

48. What can permanently break down a capacitor?
Electrical resistance against the flow of current
High resistance
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Breakdown voltage

49. In most applications - what remains constant if the current remains constant and flows in one direction?
Porcelain
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Use an effect to produce another effect
Electromagnetic field

50. What is the term for doing work at the rate of joule per second?
Opposes any change in the current flowing in a circuit
1 watt
Fixed - tapped - variable(all of the above)
Magnetic properties