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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 thermocouple uses which method for creating potential energy?
Heat
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Symbol
Insulation resistance

2. How do you read resistor color codes?
Opposition to movement of free electrons
Does not move
Start with the band on the end and read to the center
Stranded

3. What cannot be transformed to higher or lower potential differences?
Amperes
Electromagnetism
Relay
DC current

4. What is an arrangement of materials that create a potential difference by chemistry?
Cell
DC flows continuously in one direction and AC potential difference and current both change direction
Does not move
Secondary cell

5. What is a switch that operates by electricity?
Relay
10%
Use an effect to produce another effect
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

6. What is power?
The rate of doing work
How much potential difference can a material withstand before breaking down
Current flows in one direction - potential differences across a load does not change(Both A and B)
Potential difference

7. What does a moving charge produce?
15 -000 ohms - 20%
Moving vehicles
Mutual induction
A magnetic field

8. To what measurement do the conductor mills refer?
Tolerence
1/1000th of an inch
Heat
50 Ohms

9. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Stores electrical charge
Current change in a coil creates a magnetic change
Grounding wire
5%

10. What is the difference between AC and DC?
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
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
1/1000th of an inch

11. What is a common form used in conductors?
1 watt
Cables
Unlike poles attract
Start with the band on the end and read to the center

12. What is the basic law of magnetic force?
Electrical resistance against the flow of current
Unlike poles attract
Cells can be connected together to make a battery
Energy

13. What does static electricity do?
Heat
Battery
Use an effect to produce another effect
Does not move

14. What is the relationship between cells and batteries?
Relay
Fixed - Electrolytic - Variable(all of the above)
Gauge number
Cells can be connected together to make a battery

15. What do junction boxes protect?
Wire splices
Magnetic properties
Fixed - Electrolytic - Variable(all of the above)
50 Ohms

16. What can permanently break down a capacitor?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Breakdown voltage
Cables

17. What does a transformer transform?
Heat and current control(both a and c)
Volts
The relationship of potential difference to current
Wire splices

18. What is the term for two or more cells attached together?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Electromagnetism
1 watt
Battery

19. In most applications - what remains constant if the current remains constant and flows in one direction?
Fixed - tapped - variable(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Silver
Electromagnetic field

20. What is insulation resistance?
Electromagnetism
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Electrical resistance against the flow of current
A difference in potential energy

21. Which material has the lowest resistance at ordinary temperatures?
Does not move
Solenoid and Relay(both A and B)
Silver
Current change in a coil creates a magnetic change

22. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Relay
10%
Electrical resistance against the flow of current
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

23. How is the heat production measured in a resistor?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Silver
Electromagnetic field
Potential difference - E*I - current times current change from point to point(all of the above)

24. What is the measure of potential difference?
Volts
Relationship between current and potential difference
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Battery

25. What does an object have if a magnetic field acts on it?
Silver
Stranded
Choke
Magnetic properties

26. What is the unit of measurement of resistance?
Parallel circuit
Ohms
Chemical action
Voltmeter

27. Identify the general blueprint symbol for inductors.
Stores electrical charge
Symbol
Opposition to electrical current
Unlike poles attract

28. What information do the Left-Hand Rules provide?
Resistance value can not be changed
10%
Alternating current
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

29. Where does the thumb point in both Left-Hand Rules?
Potential difference
Composition of the resistor
The direction the negative charge moves
Ability to store an electric charge

30. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Resistance increases as the conductor length increases
Parallel
Volts
Insulation resistance and Dielectric strength(Both A and B)

31. Identify the blueprint symbol for capacitors.
Cables
Symbol
Electromagnetism
Two

32. Which way is the current going in the circuit shown?(electron flow)
Volts
The relationship of potential difference to current
Area and spacing of capacitor - static current in the capacitor(both A and B)
From the negative battery terminal to the positive terminal

33. What are the common units of measurement for round and square conductor cross - sections?
Symbol
How much potential difference can a material withstand before breaking down
Circular and square mills(Both A and B)
A magnetic field

34. What is true about a dry cell?
DC current
Common - not rechargable - gradually discharges when in storage(All of the above)
The direction of the magnetic field
A difference in potential energy

35. What do transducers do in electrical terms?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Insulation resistance and Dielectric strength(Both A and B)
Use an effect to produce another effect
Bonding and grounding

36. What is a property of inductors in electrical circuits?
Opposes any change in the current flowing in a circuit
--^V^V^V^---
Use an effect to produce another effect
From the negative battery terminal to the positive terminal

37. What are the two generic methods to eliminate static electricity from metal objects?
Serial
Gauge number
Bonding and grounding
Area and spacing of capacitor - static current in the capacitor(both A and B)

38. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
American wire gauge(AWG)
Moving vehicles
First digit

39. When does a DC circuit oppose current flow?
Choke
1/1000th of an inch
Serial
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

40. What is the type of cable composed of many fine wires?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Stranded
Ohms
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

41. Where do the fingers point in both Left-Hand Rules?
Composition of the resistor
Resistance increases as the conductor length increases
The direction of the magnetic field
Electrical resistance against the flow of current

42. What does resistance produce?
By their covering
Heat
Volts
Two

43. What is dielectric strength?
High resistance
Heat
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
How much potential difference can a material withstand before breaking down

44. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
DC current
12 volts
Alternating current
Ohms

45. What wire measurement is commonly used in the U.S.?
American wire gauge(AWG)
1 watt
Voltage
Choke

46. What does a third band of brown mean?
Bonding and grounding
Silver
10
Plastic - Rubber - Friction(all of the above)

47. What is a conductor?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

48. The dry cell is what method for creating potential energy?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Chemical action
Plastic - Rubber - Friction(all of the above)

49. What type of circuit has one path of follow through a load?
Series circuit
Chemical action
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Parallel circuit

50. 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
Series circuit
Bare - covered - insulated - stranded - cable(All of the above)
75 Ohms
Amperes