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 a characteristic of a fixed resistor?
Chemical action
The rate of doing work
Resistance value can not be changed
Porcelain

2. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Cables
Voltage
5%
The rate of doing work

3. What is a wire classification?
First digit is 9
Bare - covered - insulated - stranded - cable(All of the above)
From the negative battery terminal to the positive terminal
Series circuit

4. 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)
Opposition to movement of free electrons
Mutual induction
1/1000th of an inch

5. What is the unit of measurement of potential difference?
Resistance value can not be changed
Volts
Fixed - Electrolytic - Variable(all of the above)
Tolerence

6. What is insulation resistance?
Relay
Breakdown voltage
Silver
Electrical resistance against the flow of current

7. What is the type of cable composed of many fine wires?
Bare - covered - insulated - stranded - cable(All of the above)
Cell
Stores electrical charge
Stranded

8. What is a common measure of wire diameter?
Resistance increases as the conductor length increases
Magnetic properties
Gauge number
10

9. What is resistance in electrical terms?
Stranded
Opposition to electrical current
Purging
Start with the band on the end and read to the center

10. Why is the transformer important to AC electricity?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

11. The generator is what method of creating potential energy?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Electromagnetism
Gauge number

12. Which of the following materials is NOT a good conductor?
75 Ohms
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
1 watt
Porcelain

13. What is the purpose of capacitors in electrical circuits?
Chemical action
Series circuit
Composition of the resistor
Stores electrical charge

14. What is dielectric strength?
How much potential difference can a material withstand before breaking down
Voltage
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Cables

15. What is power?
The rate of doing work
Chemical action
High resistance
Volts

16. What is a common cause of static electricity in a shop?
The direction of the magnetic field
Grounding wire
Moving vehicles
Electromagnetism

17. When reading resistance color codes - what does the first band indicate?
First digit
Voltmeter
Circular and square mills(Both A and B)
Relay

18. What is the use of the electromagnet?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
Use an effect to produce another effect
Chemical action

19. Which material has the lowest resistance at ordinary temperatures?
Parallel
Cell
Silver
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

20. How many kinds of poles do magnets have?
Cables
Volts
Two
First digit is 9

21. What does resistance produce?
Heat
Series circuit
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Solenoid and Relay(both A and B)

22. 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 relationship of potential difference to current
Porcelain
American wire gauge(AWG)

23. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Serial
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Secondary cell
Cables

24. What is a way to classify wires and cables?
Unlike poles attract
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)
By their covering
Cell

25. What is the relationship between cells and batteries?
Moving vehicles
15 -000 ohms - 20%
Cells can be connected together to make a battery
A magnetic field

26. What is the difference between AC and DC?
Stores electrical charge
Silver
Volts
DC flows continuously in one direction and AC potential difference and current both change direction

27. 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
Parallel circuit
Cables
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
75 Ohms

28. What is resistance?
Opposition to movement of free electrons
Start with the band on the end and read to the center
Solenoid and Relay(both A and B)
Area and spacing of capacitor - static current in the capacitor(both A and B)

29. What is induction?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Magnetic properties
Bare - covered - insulated - stranded - cable(All of the above)
Current change in a coil creates a magnetic change

30. What is another name for an inductor?
Opposition to electrical current
Potential difference - E*I - current times current change from point to point(all of the above)
Choke
American wire gauge(AWG)

31. What is the purpose of a raceway?
Cells can be connected together to make a battery
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Fixed - Electrolytic - Variable(all of the above)

32. What instrument measures voltage?
10
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Voltmeter
Stranded

33. What does a third band of brown mean?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Wire splices
10
First digit is 9

34. What is a type of capacitor?
15 -000 ohms - 20%
Strength of the charge
Opposition to movement of free electrons
Fixed - Electrolytic - Variable(all of the above)

35. What is a rigid metal conduit?
A magnetic field
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Tolerence
Cell

36. What is needed for electric heating elements and the filaments of light bulbs?
Gauge number
DC flows continuously in one direction and AC potential difference and current both change direction
High resistance
10%

37. What do junction boxes protect?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Stores electrical charge
Wire splices
Current change in a coil creates a magnetic change

38. What do we call the ability to do work?
Cables
Energy
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)
Strength of the charge

39. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Opposition to electrical current
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

40. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Alternating current
20%
Area and spacing of capacitor - static current in the capacitor(both A and B)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

41. In most applications - what remains constant if the current remains constant and flows in one direction?
Choke
Volts
Electromagnetic field
Wire splices

42. What is the relationship of conductor size and length to resistance?
Potential difference
Resistance increases as the conductor length increases
Opposition to electrical current
The direction the negative charge moves

43. What is a characteristic of insulators?
Silver
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
50 Ohms

44. What are the two generic methods to eliminate static electricity from metal objects?
Area and spacing of capacitor - static current in the capacitor(both A and B)
The relationship of potential difference to current
Plastic - Rubber - Friction(all of the above)
Bonding and grounding

45. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Circular and square mills(Both A and B)
The direction the negative charge moves
Stores electrical charge
10%

46. What results when current is run through a material with high resistance?
Two
Heat and current control(both a and c)
A difference in potential energy
10

47. 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)
Choke
Two
Grounding wire

48. What is a type of mechanical transducer?
Bare - covered - insulated - stranded - cable(All of the above)
Bonding and grounding
Circular and square mills(Both A and B)
Solenoid and Relay(both A and B)

49. How do you read resistor color codes?
Magnetic properties
Voltage
Start with the band on the end and read to the center
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

50. What is a common form used in conductors?
Two
10%
Cables
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)