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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 the name for electrical resistance of insulation?
Moving vehicles
Insulation resistance
How much potential difference can a material withstand before breaking down
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)

2. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Ability to store an electric charge
Voltage
Stranded
Cell

3. What is a way to classify wires and cables?
Potential difference
Start with the band on the end and read to the center
Potential difference - E*I - current times current change from point to point(all of the above)
By their covering

4. What type of circuit has one path of follow through a load?
Series circuit
Potential difference - E*I - current times current change from point to point(all of the above)
Choke
Does not move

5. Where do the fingers point in both Left-Hand Rules?
75 Ohms
The direction of the magnetic field
Current change in a coil creates a magnetic change
Electromagnetic field

6. What instrument measures voltage?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Voltmeter
Common - not rechargable - gradually discharges when in storage(All of the above)
Electromagnetic field

7. What is capacitance in electrical terms?
Ability to store an electric charge
Use an effect to produce another effect
Electrical resistance against the flow of current
Stores electrical charge

8. What is the fundamental property of insulators?
Purging
Insulation resistance and Dielectric strength(Both A and B)
How much potential difference can a material withstand before breaking down
Bare - covered - insulated - stranded - cable(All of the above)

9. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Fixed - Electrolytic - Variable(all of the above)
Potential difference
Voltmeter
Purging

10. What is a conductor?
Relay
Stranded
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Ability to store an electric charge

11. How do static charges distribute themselves?
Wire splices
Voltmeter
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

12. What is resistance in electrical terms?
Opposition to electrical current
Cables
Ability to store an electric charge
The relationship of potential difference to current

13. What is dielectric strength?
DC flows continuously in one direction and AC potential difference and current both change direction
The direction the negative charge moves
Heat
How much potential difference can a material withstand before breaking down

14. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Opposes any change in the current flowing in a circuit
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Resistance value can not be changed

15. What makes electrons flow?
Potential difference
Electromagnetism
15 -000 ohms - 20%
Composition of the resistor

16. What is a type of mechanical transducer?
Silver
Solenoid and Relay(both A and B)
Purging
Cables

17. What cannot be transformed to higher or lower potential differences?
Heat
Resistance increases as the conductor length increases
DC current
Bonding and grounding

18. What can permanently break down a capacitor?
Breakdown voltage
Moving vehicles
Opposes any change in the current flowing in a circuit
Gauge number

19. What does a third band of brown mean?
The relationship of potential difference to current
Relationship between current and potential difference
From the negative battery terminal to the positive terminal
10

20. What is the term for doing work at the rate of joule per second?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Heat
1 watt
Current flows in one direction - potential differences across a load does not change(Both A and B)

21. What is true about a dry cell?
Chemical action
Common - not rechargable - gradually discharges when in storage(All of the above)
Electromagnetic field
By their covering

22. What does static electricity do?
Heat
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)
Purging
Does not move

23. What does a transformer transform?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Tolerence
The relationship of potential difference to current
Porcelain

24. What are the common units of measurement for round and square conductor cross - sections?
Porcelain
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
First digit
Circular and square mills(Both A and B)

25. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Amperes
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
10%
Start with the band on the end and read to the center

26. What is resistance?
Magnetic properties
Tolerence
Opposition to movement of free electrons
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

27. What is a DC circuit characteristic?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Alternating current
Bare - covered - insulated - stranded - cable(All of the above)
Unlike poles attract

28. What types of protective tapes are used?
Start with the band on the end and read to the center
Plastic - Rubber - Friction(all of the above)
Ohms
Heat

29. Which material has the lowest resistance at ordinary temperatures?
Silver
Chemical action
Potential difference
Ohms

30. What is the term for two or more cells attached together?
Parallel
Battery
Secondary cell
A difference in potential energy

31. The generator is what method of creating potential energy?
Parallel circuit
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Electromagnetism
Insulation resistance

32. What does a first band of white mean?
Opposition to electrical current
First digit is 9
Composition of the resistor
Serial

33. Identify the general blueprint symbol for inductors.
Opposes any change in the current flowing in a circuit
--^V^V^V^---
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Symbol

34. What is the unit of measurement of resistance?
High resistance
Gauge number
Moving vehicles
Ohms

35. What is the use of the electromagnet?
Produce heat - light - or limit current to control it(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Cells can be connected together to make a battery
Stranded

36. What is a characteristic of insulators?
Gauge number
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
50 Ohms
By their covering

37. What does an object have if a magnetic field acts on it?
From the negative battery terminal to the positive terminal
Heat and current control(both a and c)
Start with the band on the end and read to the center
Magnetic properties

38. What is a switch that operates by electricity?
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)
Parallel circuit
Porcelain
Relay

39. What determines the resistance of a resistor?
Composition of the resistor
1/1000th of an inch
Resistance increases as the conductor length increases
Heat

40. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Mutual induction
50 Ohms
Moving vehicles
How much potential difference can a material withstand before breaking down

41. Which way is the current going in the circuit shown?(electron flow)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Potential difference
Current change in a coil creates a magnetic change
From the negative battery terminal to the positive terminal

42. What makes electrons flow?
Produce heat - light - or limit current to control it(all of the above)
Potential difference
75 Ohms
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

43. What does Ohm's Law represent?
Area and spacing of capacitor - static current in the capacitor(both A and B)
1/1000th of an inch
Stranded
Relationship between current and potential difference

44. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Stranded
Start with the band on the end and read to the center
Alternating current

45. What are the names of two of the six primary methods of producing a voltage?
Opposition to electrical current
20%
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Magnetic properties

46. What wire measurement is commonly used in the U.S.?
American wire gauge(AWG)
Symbol
Potential difference
Ohms

47. What is an electromagnet?
Symbol
DC current
5%
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

48. What is insulation resistance?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Porcelain
Mutual induction
Electrical resistance against the flow of current

49. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Potential difference
Does not move
5%
How much potential difference can a material withstand before breaking down

50. What is a characteristic of a fixed resistor?
Chemical action
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Tolerence
Resistance value can not be changed