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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. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
Produce heat - light - or limit current to control it(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Gauge number

2. What is resistance in electrical terms?
Opposition to electrical current
Relationship between current and potential difference
Tolerence
Two

3. What is a conductor?
Cell
50 Ohms
Relay
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

4. What is the relationship of conductor size and length to resistance?
Cables
Purging
Potential difference - E*I - current times current change from point to point(all of the above)
Resistance increases as the conductor length increases

5. Where does the thumb point in both Left-Hand Rules?
1 watt
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
The direction the negative charge moves
Strength of the charge

6. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)
Insulation resistance and Dielectric strength(Both A and B)
Serial

7. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Insulation resistance
10%
Common - not rechargable - gradually discharges when in storage(All of the above)
Stores electrical charge

8. How do you read resistor color codes?
--^V^V^V^---
Mutual induction
Start with the band on the end and read to the center
Energy

9. What is a way to classify wires and cables?
Serial
The direction of the magnetic field
The relationship of potential difference to current
By their covering

10. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Resistance increases as the conductor length increases
20%

11. Identify the blueprint symbol for resistors.
--^V^V^V^---
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)
Heat
How much potential difference can a material withstand before breaking down

12. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
First digit is 9
The relationship of potential difference to current
Purging
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

13. 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)
Solenoid and Relay(both A and B)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Magnetic properties

14. When reading resistance color codes - what does the fourth band indicate?
Tolerence
From the negative battery terminal to the positive terminal
High resistance
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

15. What do transducers do in electrical terms?
Unlike poles attract
Amperes
Parallel
Use an effect to produce another effect

16. What are the two generic methods to eliminate static electricity from metal objects?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Breakdown voltage
Tolerence
Bonding and grounding

17. What makes electrons flow?
By their covering
Potential difference
The direction of the magnetic field
Electrical resistance against the flow of current

18. What is induction?
Current change in a coil creates a magnetic change
Resistance increases as the conductor length increases
Stranded
A magnetic field

19. What types of protective tapes are used?
Porcelain
Circular and square mills(Both A and B)
Plastic - Rubber - Friction(all of the above)
Symbol

20. What is the relationship between cells and batteries?
Parallel circuit
Cells can be connected together to make a battery
Relay
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

21. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
50 Ohms
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Use an effect to produce another effect

22. What is the term for two or more cells attached together?
Potential difference - E*I - current times current change from point to point(all of the above)
Stranded
The relationship of potential difference to current
Battery

23. What is a common form used in conductors?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Heat and current control(both a and c)
5%
Cables

24. What determines the resistance of a resistor?
Composition of the resistor
Electromagnetic field
Potential difference
By their covering

25. Which of the following is a type of resistor?
Fixed - tapped - variable(all of the above)
Tolerence
Bare - covered - insulated - stranded - cable(All of the above)
Heat

26. 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)
Moving vehicles
From the negative battery terminal to the positive terminal
Battery

27. What can permanently break down a capacitor?
Current change in a coil creates a magnetic change
Mutual induction
Breakdown voltage
Stores electrical charge

28. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
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)
Secondary cell
High resistance

29. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Start with the band on the end and read to the center
American wire gauge(AWG)
Ohms
Serial

30. What is a characteristic of insulators?
Bare - covered - insulated - stranded - cable(All of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Cables
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

31. What is a switch that operates by electricity?
Energy
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Relay
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

32. What does a first band of white mean?
1 watt
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
First digit is 9

33. To what measurement do the conductor mills refer?
1/1000th of an inch
Start with the band on the end and read to the center
Secondary cell
Fixed - tapped - variable(all of the above)

34. What information do the Left-Hand Rules provide?
The direction of the magnetic field
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Breakdown voltage
Symbol

35. In most applications - what remains constant if the current remains constant and flows in one direction?
Composition of the resistor
Gauge number
Electromagnetic field
Does not move

36. What cannot be transformed to higher or lower potential differences?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
DC current
Ohms
Silver

37. What is capacitance in electrical terms?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Ability to store an electric charge
1/1000th of an inch
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

38. Which type of cell can be recharged?
Secondary cell
Potential difference
A magnetic field
Area and spacing of capacitor - static current in the capacitor(both A and B)

39. What is a characteristic of a fixed resistor?
Stranded
Parallel circuit
Resistance value can not be changed
Bonding and grounding

40. What is resistance?
Opposition to movement of free electrons
The direction the negative charge moves
Porcelain
15 -000 ohms - 20%

41. What is the name for electrical resistance of insulation?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)
Insulation resistance
Circular and square mills(Both A and B)

42. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Current change in a coil creates a magnetic change
Insulation resistance
75 Ohms
Alternating current

43. Identify the blueprint symbol for capacitors.
Symbol
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)
1 watt
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

44. What does an object have if a magnetic field acts on it?
A magnetic field
Magnetic properties
--^V^V^V^---
Opposition to electrical current

45. How is the heat production measured in a resistor?
Symbol
Potential difference - E*I - current times current change from point to point(all of the above)
Energy
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

46. Which of the following materials is NOT a good conductor?
50 Ohms
Porcelain
Stores electrical charge
From the negative battery terminal to the positive terminal

47. What is a property of inductors in electrical circuits?
1 watt
Bonding and grounding
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

48. What wire measurement is commonly used in the U.S.?
Potential difference
American wire gauge(AWG)
12 volts
A difference in potential energy

49. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
Potential difference
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Amperes

50. What do electrical charges need to cause a fire or explosion?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Insulation resistance
The rate of doing work