Test your basic knowledge |

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 the purpose of a raceway?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Two
Heat and current control(both a and c)

2. What types of protective tapes are used?
Opposes any change in the current flowing in a circuit
10
Secondary cell
Plastic - Rubber - Friction(all of the above)

3. What results when current is run through a material with high resistance?
Two
Heat and current control(both a and c)
A magnetic field
Alternating current

4. What does Ohm's Law represent?
Magnetic properties
Volts
DC flows continuously in one direction and AC potential difference and current both change direction
Relationship between current and potential difference

5. What is the use of the electromagnet?
5%
The direction of the magnetic field
Moving vehicles
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

6. What is a way to classify wires and cables?
By their covering
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(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)

7. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Plastic - Rubber - Friction(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Opposes any change in the current flowing in a circuit

8. What makes electrons flow?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
By their covering
Potential difference
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

9. What is a DC circuit characteristic?
Electrical resistance against the flow of current
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)
Produce heat - light - or limit current to control it(all of the above)

10. What is a characteristic of a fixed resistor?
Resistance value can not be changed
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Unlike poles attract
Stranded

11. What is the measure of potential difference?
Resistance value can not be changed
Volts
By their covering
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

12. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Magnetic properties
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Serial
Resistance value can not be changed

13. What is a common cause of static electricity in a shop?
Symbol
How much potential difference can a material withstand before breaking down
20%
Moving vehicles

14. What is the term for two or more cells attached together?
Battery
Volts
50 Ohms
Area and spacing of capacitor - static current in the capacitor(both A and B)

15. What is a common measure of wire diameter?
Circular and square mills(Both A and B)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Gauge number
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

16. When reading resistance color codes - what does the fourth band indicate?
Bare - covered - insulated - stranded - cable(All of the above)
Heat and current control(both a and c)
Tolerence
Alternating current

17. The thermocouple uses which method for creating potential energy?
Heat
Silver
Opposition to movement of free electrons
15 -000 ohms - 20%

18. What does a transformer transform?
Fixed - tapped - variable(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
The relationship of potential difference to current
20%

19. The generator is what method of creating potential energy?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Symbol
Electromagnetism
Does not move

20. What is the unit of measurement of electrical current?
Amperes
1/1000th of an inch
Stores electrical charge
High resistance

21. What is the relationship of conductor size and length to resistance?
Series circuit
Magnetic properties
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Resistance increases as the conductor length increases

22. What is power?
Silver
Fixed - Electrolytic - Variable(all of the above)
Start with the band on the end and read to the center
The rate of doing work

23. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Stranded
A difference in potential energy
Heat and current control(both a and c)
Purging

24. What is voltage?
A difference in potential energy
Fixed - Electrolytic - Variable(all of the above)
Electromagnetic field
Produce heat - light - or limit current to control it(all of the above)

25. The dry cell is what method for creating potential energy?
Porcelain
Chemical action
20%
Opposition to movement of free electrons

26. Identify the blueprint symbol for resistors.
Electrical resistance against the flow of current
Cables
--^V^V^V^---
Series circuit

27. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
20%
Gauge number
Heat and current control(both a and c)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

28. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Insulation resistance
Purging
Parallel
Resistance increases as the conductor length increases

29. Which type of cell can be recharged?
By their covering
Secondary cell
10
Potential difference

30. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Symbol
Moving vehicles
Mutual induction

31. What is a type of mechanical transducer?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Solenoid and Relay(both A and B)
Common - not rechargable - gradually discharges when in storage(All of the above)

32. What is the relationship between cells and batteries?
Purging
Cells can be connected together to make a battery
Start with the band on the end and read to the center
Electromagnetism

33. Given R=E / I and the following information - plug in the data and solve the problem for resistance. 1.5 volt walkman battery - 0.02 amps of current
Moving vehicles
75 Ohms
Start with the band on the end and read to the center
First digit

34. What is an electromagnet?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
The direction of the magnetic field
Electromagnetic field
Mutual induction

35. What cannot be transformed to higher or lower potential differences?
DC current
Purging
Fixed - Electrolytic - Variable(all of the above)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

36. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Heat
Voltage
From the negative battery terminal to the positive terminal
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

37. What must be large enough to carry the largest current likely to occur?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Electrical resistance against the flow of current
Grounding wire
First digit

38. Identify the general blueprint symbol for inductors.
Symbol
Voltmeter
10%
Silver

39. When does a DC circuit oppose current flow?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Series circuit
Wire splices
Purging

40. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Potential difference - E*I - current times current change from point to point(all of the above)
Alternating current
Cables
Moving vehicles

41. What is a type of capacitor?
Battery
12 volts
The direction of the magnetic field
Fixed - Electrolytic - Variable(all of the above)

42. What do transducers do in electrical terms?
Cables
Fixed - Electrolytic - Variable(all of the above)
Heat
Use an effect to produce another effect

43. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
Series circuit
Potential difference
75 Ohms

44. Which of the following is a type of resistor?
DC flows continuously in one direction and AC potential difference and current both change direction
Fixed - tapped - variable(all of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)
Cells can be connected together to make a battery

45. What type of circuit has one path of follow through a load?
Voltmeter
Series circuit
Serial
Circular and square mills(Both A and B)

46. What makes electrons flow?
Potential difference
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Ability to store an electric charge
Relay

47. How is capacitance determined?
A difference in potential energy
Opposition to movement of free electrons
Area and spacing of capacitor - static current in the capacitor(both A and B)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

48. What is a wire classification?
Unlike poles attract
Cables
Bare - covered - insulated - stranded - cable(All of the above)
Energy

49. What is the term for doing work at the rate of joule per second?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Potential difference
1 watt
Cells can be connected together to make a battery

50. What is resistance in electrical terms?
Opposition to electrical current
Cells can be connected together to make a battery
Does not move
Resistance value can not be changed