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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. Identify the blueprint symbol for capacitors.
Symbol
Insulation resistance and Dielectric strength(Both A and B)
Heat and current control(both a and c)
10

2. What is resistance?
Parallel circuit
Opposition to movement of free electrons
Grounding wire
Bare - covered - insulated - stranded - cable(All of the above)

3. What do we call the ability to do work?
1 watt
Relationship between current and potential difference
Heat
Energy

4. What determines whether a spark can be produced?
Strength of the charge
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Volts
1 watt

5. What cannot be transformed to higher or lower potential differences?
Tolerence
Two
By their covering
DC current

6. What is a DC circuit characteristic?
Potential difference - E*I - current times current change from point to point(all of the above)
Stranded
Current flows in one direction - potential differences across a load does not change(Both A and B)
The direction of the magnetic field

7. How many kinds of poles do magnets have?
Current change in a coil creates a magnetic change
Two
How much potential difference can a material withstand before breaking down
Circular and square mills(Both A and B)

8. What is resistance in electrical terms?
Opposition to electrical current
The direction of the magnetic field
Tolerence
A difference in potential energy

9. The dry cell is what method for creating potential energy?
Chemical action
Purging
Cell
Energy

10. What is a switch that operates by electricity?
Secondary cell
Produce heat - light - or limit current to control it(all of the above)
Relay
Start with the band on the end and read to the center

11. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
Purging
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)
Wire splices

12. What information do the Left-Hand Rules provide?
Grounding wire
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
The direction the negative charge moves
--^V^V^V^---

13. What does a moving charge produce?
Ability to store an electric charge
Fixed - tapped - variable(all of the above)
Opposes any change in the current flowing in a circuit
A magnetic field

14. What is a wire classification?
DC current
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Tolerence
Bare - covered - insulated - stranded - cable(All of the above)

15. What makes electrons flow?
Serial
Symbol
Potential difference
Amperes

16. What does a third band of brown mean?
10
Alternating current
15 -000 ohms - 20%
Opposes any change in the current flowing in a circuit

17. What is the term for doing work at the rate of joule per second?
1 watt
Alternating current
Electromagnetic field
Tolerence

18. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Bonding and grounding
5%
Energy
Fixed - Electrolytic - Variable(all of the above)

19. What is a characteristic of insulators?
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)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Parallel circuit
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

20. What is a common form used in conductors?
Use an effect to produce another effect
By their covering
Cables
Relationship between current and potential difference

21. Identify the blueprint symbol for resistors.
Stranded
Solenoid and Relay(both A and B)
--^V^V^V^---
Cell

22. What do electrical charges need to cause a fire or explosion?
First digit is 9
Silver
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Cell

23. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Ohms
A difference in potential energy
Opposition to movement of free electrons

24. 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
Moving vehicles
12 volts
Bonding and grounding
Electromagnetic field

25. What are the names of two of the six primary methods of producing a voltage?
Battery
A magnetic field
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

26. What is voltage?
A difference in potential energy
Relationship between current and potential difference
12 volts
Opposition to electrical current

27. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
Electromagnetic field
5%
--^V^V^V^---

28. What type of circuit has one path of follow through a load?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Relay
Series circuit

29. What instrument measures voltage?
75 Ohms
Voltmeter
From the negative battery terminal to the positive terminal
Chemical action

30. What is a characteristic of a fixed resistor?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Resistance value can not be changed
Cables
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

31. How do you read resistor color codes?
Start with the band on the end and read to the center
Battery
Produce heat - light - or limit current to control it(all of the above)
Use an effect to produce another effect

32. What wire measurement is commonly used in the U.S.?
American wire gauge(AWG)
Silver
Parallel
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

33. What is an electromagnet?
Electromagnetism
Area and spacing of capacitor - static current in the capacitor(both A and B)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
1 watt

34. What is the use of the electromagnet?
High resistance
Electrical resistance against the flow of current
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Parallel circuit

35. What makes electrons flow?
Produce heat - light - or limit current to control it(all of the above)
50 Ohms
Potential difference
Secondary cell

36. What do transducers do in electrical terms?
75 Ohms
Use an effect to produce another effect
Voltmeter
Cells can be connected together to make a battery

37. What does an object have if a magnetic field acts on it?
Resistance increases as the conductor length increases
Symbol
Fixed - Electrolytic - Variable(all of the above)
Magnetic properties

38. What is a type of mechanical transducer?
Ability to store an electric charge
Solenoid and Relay(both A and B)
10%
Breakdown voltage

39. Which way is the current going in the circuit shown?(electron flow)
From the negative battery terminal to the positive terminal
Bare - covered - insulated - stranded - cable(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)
Voltmeter

40. What is an arrangement of materials that create a potential difference by chemistry?
Circular and square mills(Both A and B)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Cell
1/1000th of an inch

41. What does resistance produce?
Heat
Volts
Magnetic properties
Relay

42. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
Insulation resistance and Dielectric strength(Both A and B)
The direction of the magnetic field
Resistance increases as the conductor length increases

43. Which of the following is a type of resistor?
Unlike poles attract
DC flows continuously in one direction and AC potential difference and current both change direction
Fixed - tapped - variable(all of the above)
Ohms

44. What results when current is run through a material with high resistance?
Opposition to movement of free electrons
Ohms
Heat and current control(both a and c)
The relationship of potential difference to current

45. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Ohms
15 -000 ohms - 20%
Potential difference

46. What is a property of inductors in electrical circuits?
Volts
Opposes any change in the current flowing in a circuit
Current change in a coil creates a magnetic change
20%

47. The thermocouple uses which method for creating potential energy?
Potential difference
The direction the negative charge moves
Heat
15 -000 ohms - 20%

48. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Opposition to movement of free electrons
Alternating current
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Insulation resistance and Dielectric strength(Both A and B)

49. What is the purpose of resistors in electrical circuits?
Stores electrical charge
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Purging
Produce heat - light - or limit current to control it(all of the above)

50. To what measurement do the conductor mills refer?
1/1000th of an inch
Purging
Potential difference - E*I - current times current change from point to point(all of the above)
Battery