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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. The generator is what method of creating potential energy?
5%
Volts
Electrical resistance against the flow of current
Electromagnetism

2. What is the unit of measurement of potential difference?
Composition of the resistor
Chemical action
Opposition to electrical current
Volts

3. Identify the general blueprint symbol for inductors.
Symbol
Tolerence
DC current
Resistance increases as the conductor length increases

4. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Ability to store an electric charge
The direction of the magnetic field
5%
Purging

5. What do transducers do in electrical terms?
10%
Use an effect to produce another effect
Moving vehicles
Bare - covered - insulated - stranded - cable(All of the above)

6. What is the relationship of conductor size and length to resistance?
Parallel
Mutual induction
Resistance increases as the conductor length increases
Electromagnetism

7. What does static electricity do?
Grounding wire
10
Does not move
Fixed - Electrolytic - Variable(all of the above)

8. What is the purpose of resistors in electrical circuits?
Two
DC flows continuously in one direction and AC potential difference and current both change direction
Produce heat - light - or limit current to control it(all of the above)
Moving vehicles

9. What do electrical charges need to cause a fire or explosion?
Cables
Ohms
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction

10. What do we call the ability to do work?
Energy
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Relationship between current and potential difference
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

11. What is the term for two or more cells attached together?
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)
DC flows continuously in one direction and AC potential difference and current both change direction
Battery
Fixed - tapped - variable(all of the above)

12. What is an arrangement of materials that create a potential difference by chemistry?
Cell
Heat
Voltage
Bare - covered - insulated - stranded - cable(All of the above)

13. Which of the following is a type of resistor?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Symbol
The direction of the magnetic field
Fixed - tapped - variable(all of the above)

14. What is a common form used in conductors?
Electromagnetism
Cables
Heat and current control(both a and c)
From the negative battery terminal to the positive terminal

15. What can permanently break down a capacitor?
Breakdown voltage
A magnetic field
Fixed - tapped - variable(all of the above)
Silver

16. What is the term for doing work at the rate of joule per second?
Choke
Fixed - tapped - variable(all of the above)
Volts
1 watt

17. What does an object have if a magnetic field acts on it?
Insulation resistance
Strength of the charge
Does not move
Magnetic properties

18. Which type of cell can be recharged?
Two
Stranded
Electromagnetism
Secondary cell

19. What is another name for an inductor?
Choke
Resistance value can not be changed
First digit
High resistance

20. What does a first band of white mean?
Insulation resistance and Dielectric strength(Both A and B)
Fixed - tapped - variable(all of the above)
First digit is 9
Stranded

21. What is power?
Fixed - tapped - variable(all of the above)
A magnetic field
The rate of doing work
Area and spacing of capacitor - static current in the capacitor(both A and B)

22. What is the name for electrical resistance of insulation?
Solenoid and Relay(both A and B)
Insulation resistance
Parallel circuit
Alternating current

23. What do junction boxes protect?
Wire splices
Relationship between current and potential difference
Purging
Secondary cell

24. What does a moving charge produce?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Fixed - Electrolytic - Variable(all of the above)
A magnetic field
Potential difference

25. Which way is the current going in the circuit shown?(electron flow)
Produce heat - light - or limit current to control it(all of the above)
Choke
From the negative battery terminal to the positive terminal
The direction the negative charge moves

26. What is a rigid metal conduit?
How much potential difference can a material withstand before breaking down
Electromagnetism
Wire splices
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

27. In most applications - what remains constant if the current remains constant and flows in one direction?
Heat and current control(both a and c)
Electromagnetic field
Resistance increases as the conductor length increases
Magnetic properties

28. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Cell
20%
Parallel
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

29. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
DC flows continuously in one direction and AC potential difference and current both change direction
Alternating current
Strength of the charge
15 -000 ohms - 20%

30. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Stranded
Cells can be connected together to make a battery
Bare - covered - insulated - stranded - cable(All of the above)

31. What is a common measure of wire diameter?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
1 watt
Resistance increases as the conductor length increases
Gauge number

32. A resistor is color coded brown - green - orange. What is its resistance?
Opposes any change in the current flowing in a circuit
15 -000 ohms - 20%
The direction the negative charge moves
Voltage

33. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
A magnetic field
Fixed - Electrolytic - Variable(all of the above)
Mutual induction
Ability to store an electric charge

34. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
A magnetic field
The relationship of potential difference to current
Insulation resistance
10%

35. What is insulation resistance?
Cables
High resistance
Electrical resistance against the flow of current
The rate of doing work

36. What is the measure of potential difference?
Solenoid and Relay(both A and B)
Volts
A difference in potential energy
Fixed - Electrolytic - Variable(all of the above)

37. What instrument measures voltage?
Cells can be connected together to make a battery
Potential difference
Voltmeter
Amperes

38. What is the fundamental property of insulators?
Cables
Insulation resistance and Dielectric strength(Both A and B)
50 Ohms
75 Ohms

39. What are the names of two of the six primary methods of producing a voltage?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Porcelain
10%
Cell

40. What type of circuit has two or more paths for current to follow?
Fixed - Electrolytic - Variable(all of the above)
Parallel circuit
Grounding wire
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

41. Which of the following materials is NOT a good conductor?
Bonding and grounding
Porcelain
Potential difference - E*I - current times current change from point to point(all of the above)
12 volts

42. Which material has the lowest resistance at ordinary temperatures?
Heat
The direction the negative charge moves
Volts
Silver

43. What is the type of cable composed of many fine wires?
Stranded
Unlike poles attract
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Symbol

44. What are the common units of measurement for round and square conductor cross - sections?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Circular and square mills(Both A and B)
Series circuit
Electromagnetic field

45. What is a characteristic of a fixed resistor?
High resistance
Potential difference
Resistance value can not be changed
Voltage

46. How is capacitance determined?
Alternating current
1/1000th of an inch
Porcelain
Area and spacing of capacitor - static current in the capacitor(both A and B)

47. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
How much potential difference can a material withstand before breaking down
American wire gauge(AWG)
Cell

48. What determines the resistance of a resistor?
Parallel circuit
Composition of the resistor
DC current
The rate of doing work

49. What is resistance?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Opposition to movement of free electrons
Amperes
Relationship between current and potential difference

50. What is a switch that operates by electricity?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Current change in a coil creates a magnetic change
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Relay