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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 produced when an alternator rotates 360 electrical degrees through a magnetic field?
Gauge number
Resistance increases as the conductor length increases
Cables
Alternating current

2. What is insulation resistance?
10%
Parallel circuit
Heat
Electrical resistance against the flow of current

3. What is the unit of measurement of potential difference?
10%
Potential difference
Grounding wire
Volts

4. Identify the blueprint symbol for capacitors.
Opposition to movement of free electrons
Symbol
5%
Insulation resistance and Dielectric strength(Both A and B)

5. Identify the blueprint symbol for resistors.
Gauge number
Resistance value can not be changed
Purging
--^V^V^V^---

6. What makes electrons flow?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Potential difference
Current flows in one direction - potential differences across a load does not change(Both A and B)
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)

7. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Parallel
Potential difference
Symbol
High resistance

8. What is a wire classification?
Bare - covered - insulated - stranded - cable(All of the above)
American wire gauge(AWG)
Voltmeter
Area and spacing of capacitor - static current in the capacitor(both A and B)

9. What do transducers do in electrical terms?
Use an effect to produce another effect
Porcelain
Start with the band on the end and read to the center
The direction the negative charge moves

10. What determines the resistance of a resistor?
Gauge number
First digit is 9
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)
Composition of the resistor

11. What is a rigid metal conduit?
Secondary cell
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Stranded
Heat

12. What is power?
12 volts
By their covering
Cell
The rate of doing work

13. What can permanently break down a capacitor?
DC current
Breakdown voltage
Electrical resistance against the flow of current
Start with the band on the end and read to the center

14. What is the term for doing work at the rate of joule per second?
Volts
Energy
1 watt
Stores electrical charge

15. In most applications - what remains constant if the current remains constant and flows in one direction?
Breakdown voltage
15 -000 ohms - 20%
Amperes
Electromagnetic field

16. 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
12 volts
Stores electrical charge
Area and spacing of capacitor - static current in the capacitor(both A and B)
Volts

17. What does a third band of brown mean?
Wire splices
Opposition to movement of free electrons
Bare - covered - insulated - stranded - cable(All of the above)
10

18. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Serial
Current change in a coil creates a magnetic change
Composition of the resistor
Solenoid and Relay(both A and B)

19. When reading resistance color codes - what does the first band indicate?
Insulation resistance
The rate of doing work
First digit
Cables

20. When does a DC circuit oppose current flow?
Relay
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
The relationship of potential difference to current
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

21. The generator is what method of creating potential energy?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Electromagnetism
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)

22. What is the relationship between cells and batteries?
Insulation resistance and Dielectric strength(Both A and B)
Strength of the charge
Cells can be connected together to make a battery
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

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

24. What results when current is run through a material with high resistance?
Series circuit
1 watt
Heat and current control(both a and c)
Resistance increases as the conductor length increases

25. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
The rate of doing work
Mutual induction

26. What does an object have if a magnetic field acts on it?
Magnetic properties
15 -000 ohms - 20%
First digit is 9
By their covering

27. What is the type of cable composed of many fine wires?
Stranded
DC current
1/1000th of an inch
Fixed - Electrolytic - Variable(all of the above)

28. What is the basic law of magnetic force?
Bare - covered - insulated - stranded - cable(All of the above)
Unlike poles attract
A difference in potential energy
Two

29. What cannot be transformed to higher or lower potential differences?
Electrical resistance against the flow of current
Choke
DC current
From the negative battery terminal to the positive terminal

30. What is true about a dry cell?
Wire splices
Common - not rechargable - gradually discharges when in storage(All of the above)
Series circuit
Current change in a coil creates a magnetic change

31. What instrument measures voltage?
Voltmeter
First digit
Solenoid and Relay(both A and B)
Cables

32. What is the measure of potential difference?
Breakdown voltage
Cell
12 volts
Volts

33. What is needed for electric heating elements and the filaments of light bulbs?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Use an effect to produce another effect
Potential difference
High resistance

34. What makes electrons flow?
Parallel circuit
Potential difference
Wire splices
1/1000th of an inch

35. The thermocouple uses which method for creating potential energy?
Electromagnetism
Symbol
Heat
Ohms

36. What do electrical charges need to cause a fire or explosion?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
12 volts
Electromagnetism
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

37. What is an arrangement of materials that create a potential difference by chemistry?
Plastic - Rubber - Friction(all of the above)
Fixed - tapped - variable(all of the above)
Cell
Parallel circuit

38. What does Ohm's Law represent?
Stores electrical charge
By their covering
Relationship between current and potential difference
Magnetic properties

39. Which of the following materials is NOT a good conductor?
Tolerence
Current flows in one direction - potential differences across a load does not change(Both A and B)
Porcelain
--^V^V^V^---

40. Where do the fingers point in both Left-Hand Rules?
Serial
1/1000th of an inch
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
The direction of the magnetic field

41. What is an electromagnet?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
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
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

42. What determines whether a spark can be produced?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Common - not rechargable - gradually discharges when in storage(All of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Strength of the charge

43. What does resistance produce?
Heat and current control(both a and c)
Heat
Alternating current
Two

44. What is resistance in electrical terms?
From the negative battery terminal to the positive terminal
10%
Opposition to electrical current
A magnetic field

45. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
The rate of doing work
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
10%

46. Which way is the current going in the circuit shown?(electron flow)
Magnetic properties
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
From the negative battery terminal to the positive terminal
DC current

47. What is the unit of measurement of electrical current?
Amperes
Cell
Stranded
5%

48. What are the common units of measurement for round and square conductor cross - sections?
Serial
Circular and square mills(Both A and B)
Porcelain
Bare - covered - insulated - stranded - cable(All of the above)

49. Identify the general blueprint symbol for inductors.
Symbol
Potential difference
Magnetic properties
10

50. How is capacitance determined?
Silver
Purging
Cables
Area and spacing of capacitor - static current in the capacitor(both A and B)