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 name for electrical resistance of insulation?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Porcelain
Current flows in one direction - potential differences across a load does not change(Both A and B)
Insulation resistance

2. What is a DC circuit characteristic?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Wire splices
Ability to store an electric charge
Current flows in one direction - potential differences across a load does not change(Both A and B)

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

4. The dry cell is what method for creating potential energy?
Magnetic properties
A magnetic field
Silver
Chemical action

5. Which of the following materials is NOT a good conductor?
Porcelain
American wire gauge(AWG)
High resistance
A difference in potential energy

6. What is the basic law of magnetic force?
20%
Volts
Voltage
Unlike poles attract

7. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Purging
Electromagnetic field
Serial
Battery

8. What determines whether a spark can be produced?
Relay
Strength of the charge
Heat
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

9. What do transducers do in electrical terms?
Use an effect to produce another effect
10
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)
The direction of the magnetic field

10. What is the measure of potential difference?
1/1000th of an inch
Potential difference
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Volts

11. What can permanently break down a capacitor?
Breakdown voltage
Secondary cell
Heat
From the negative battery terminal to the positive terminal

12. What is another name for an inductor?
Choke
Chemical action
Moving vehicles
Gauge number

13. What is a type of mechanical transducer?
How much potential difference can a material withstand before breaking down
Solenoid and Relay(both A and B)
Grounding wire
5%

14. What is power?
Heat
Insulation resistance
Start with the band on the end and read to the center
The rate of doing work

15. The thermocouple uses which method for creating potential energy?
Heat
1/1000th of an inch
Bare - covered - insulated - stranded - cable(All of the above)
Solenoid and Relay(both A and B)

16. What is the use of the electromagnet?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Insulation resistance
A magnetic field
Resistance increases as the conductor length increases

17. Which way is the current going in the circuit shown?(electron flow)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Current flows in one direction - potential differences across a load does not change(Both A and B)
From the negative battery terminal to the positive terminal
Bare - covered - insulated - stranded - cable(All of the above)

18. What is induction?
DC flows continuously in one direction and AC potential difference and current both change direction
Series circuit
Current change in a coil creates a magnetic change
Potential difference

19. What is the unit of measurement of electrical current?
Stranded
Symbol
Alternating current
Amperes

20. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Use an effect to produce another effect
10%
Potential difference
Plastic - Rubber - Friction(all of the above)

21. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Ability to store an electric charge
Heat
The direction of the magnetic field
Parallel

22. What does static electricity do?
Heat and current control(both a and c)
Strength of the charge
Does not move
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

23. What is a way to classify wires and cables?
By their covering
A magnetic field
Opposition to electrical current
1/1000th of an inch

24. What are the names of two of the six primary methods of producing a voltage?
Heat
Magnetic properties
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Ohms

25. What is a common measure of wire diameter?
Porcelain
Composition of the resistor
Insulation resistance
Gauge number

26. What does a first band of white mean?
Cables
Two
First digit is 9
Silver

27. What is the fundamental property of insulators?
75 Ohms
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Insulation resistance and Dielectric strength(Both A and B)
DC flows continuously in one direction and AC potential difference and current both change direction

28. What type of circuit has one path of follow through a load?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Volts
Series circuit

29. When does a DC circuit oppose current flow?
Fixed - Electrolytic - Variable(all of the above)
Magnetic properties
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Tolerence

30. What do junction boxes protect?
Wire splices
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Parallel
A difference in potential energy

31. Identify the blueprint symbol for capacitors.
Cell
Symbol
Potential difference
Voltmeter

32. What is resistance in electrical terms?
Moving vehicles
Circular and square mills(Both A and B)
Symbol
Opposition to electrical current

33. What are the common units of measurement for round and square conductor cross - sections?
Wire splices
Secondary cell
First digit
Circular and square mills(Both A and B)

34. What makes electrons flow?
Potential difference
Symbol
Resistance value can not be changed
Two

35. What is needed for electric heating elements and the filaments of light bulbs?
High resistance
By their covering
Fixed - Electrolytic - Variable(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

36. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Produce heat - light - or limit current to control it(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)
5%

37. What cannot be transformed to higher or lower potential differences?
Relay
DC current
Secondary cell
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

38. To what measurement do the conductor mills refer?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
1/1000th of an inch
From the negative battery terminal to the positive terminal

39. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
Series circuit
Amperes
Circular and square mills(Both A and B)

40. What is dielectric strength?
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)
How much potential difference can a material withstand before breaking down
Potential difference
Insulation resistance and Dielectric strength(Both A and B)

41. What is the unit of measurement of resistance?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Ohms
Current change in a coil creates a magnetic change
DC current

42. What is the unit of measurement of potential difference?
Volts
Insulation resistance and Dielectric strength(Both A and B)
Fixed - tapped - variable(all of the above)
High resistance

43. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
10
Symbol
Alternating current
Bare - covered - insulated - stranded - cable(All of the above)

44. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
15 -000 ohms - 20%
Voltmeter
Purging

45. What is a common form used in conductors?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Cables
Stores electrical charge
20%

46. What is resistance?
First digit
15 -000 ohms - 20%
Stranded
Opposition to movement of free electrons

47. What is an electromagnet?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Volts
Serial
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

48. How do you read resistor color codes?
Start with the band on the end and read to the center
Symbol
Bonding and grounding
High resistance

49. What are the two generic methods to eliminate static electricity from metal objects?
Volts
Parallel circuit
Bonding and grounding
Ohms

50. What type of circuit has two or more paths for current to follow?
Parallel circuit
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
5%
Ability to store an electric charge