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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 a conductor?
Unlike poles attract
Relationship between current and potential difference
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Heat

2. When reading resistance color codes - what does the first band indicate?
A difference in potential energy
Relationship between current and potential difference
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
First digit

3. What cannot be transformed to higher or lower potential differences?
Common - not rechargable - gradually discharges when in storage(All of the above)
Opposition to movement of free electrons
Heat
DC current

4. What does an object have if a magnetic field acts on it?
5%
Heat
Magnetic properties
Electromagnetic field

5. What is the purpose of a raceway?
Heat and current control(both a and c)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Potential difference
First digit

6. Which of the following materials is NOT a good conductor?
Chemical action
Resistance value can not be changed
Porcelain
Use an effect to produce another effect

7. What is the type of cable composed of many fine wires?
The relationship of potential difference to current
First digit is 9
Stranded
Relationship between current and potential difference

8. How is the heat production measured in a resistor?
50 Ohms
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Potential difference - E*I - current times current change from point to point(all of the above)
Electrical resistance against the flow of current

9. Identify the general blueprint symbol for inductors.
Secondary cell
Symbol
--^V^V^V^---
Choke

10. What is the purpose of resistors in electrical circuits?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Produce heat - light - or limit current to control it(all of the above)
Alternating current
Fixed - Electrolytic - Variable(all of the above)

11. What is the difference between AC and DC?
The direction of the magnetic field
Purging
DC flows continuously in one direction and AC potential difference and current both change direction
1/1000th of an inch

12. Where does the thumb point in both Left-Hand Rules?
Cell
Electromagnetism
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
The direction the negative charge moves

13. Which type of cell can be recharged?
Symbol
75 Ohms
Does not move
Secondary cell

14. What determines the resistance of a resistor?
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)
Composition of the resistor
Chemical action
Parallel

15. What is a type of mechanical transducer?
Common - not rechargable - gradually discharges when in storage(All of the above)
Voltage
Mutual induction
Solenoid and Relay(both A and B)

16. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Cell
Gauge number
Serial
Two

17. What is power?
Amperes
How much potential difference can a material withstand before breaking down
The rate of doing work
Ohms

18. What makes electrons flow?
Common - not rechargable - gradually discharges when in storage(All of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Potential difference
5%

19. What are the common units of measurement for round and square conductor cross - sections?
Parallel
Circular and square mills(Both A and B)
Bonding and grounding
Produce heat - light - or limit current to control it(all of the above)

20. What is a switch that operates by electricity?
How much potential difference can a material withstand before breaking down
American wire gauge(AWG)
DC current
Relay

21. What is capacitance in electrical terms?
Voltmeter
Resistance value can not be changed
Ability to store an electric charge
By their covering

22. What is a characteristic of insulators?
Grounding wire
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Solenoid and Relay(both A and B)
75 Ohms

23. A resistor is color coded brown - green - orange. What is its resistance?
Common - not rechargable - gradually discharges when in storage(All of the above)
Insulation resistance
50 Ohms
15 -000 ohms - 20%

24. Which of the following is a type of resistor?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Fixed - tapped - variable(all of the above)
Electromagnetic field
A difference in potential energy

25. What does a third band of brown mean?
Silver
Stores electrical charge
A magnetic field
10

26. What do electrical charges need to cause a fire or explosion?
Heat and current control(both a and c)
Opposes any change in the current flowing in a circuit
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

27. What is the name for electrical resistance of insulation?
Insulation resistance
Parallel circuit
Breakdown voltage
Mutual induction

28. What is the use of the electromagnet?
DC flows continuously in one direction and AC potential difference and current both change direction
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Electrical resistance against the flow of current
Plastic - Rubber - Friction(all of the above)

29. What types of protective tapes are used?
The relationship of potential difference to current
Common - not rechargable - gradually discharges when in storage(All of the above)
10%
Plastic - Rubber - Friction(all of the above)

30. What is another name for an inductor?
Silver
Choke
Current flows in one direction - potential differences across a load does not change(Both A and B)
Plastic - Rubber - Friction(all of the above)

31. What are the two generic methods to eliminate static electricity from metal objects?
Opposes any change in the current flowing in a circuit
Bonding and grounding
Insulation resistance and Dielectric strength(Both A and B)
Alternating current

32. What is resistance?
Cables
Opposition to movement of free electrons
Potential difference
Breakdown voltage

33. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Alternating current
Potential difference
Fixed - Electrolytic - Variable(all of the above)
Circular and square mills(Both A and B)

34. Identify the blueprint symbol for capacitors.
Symbol
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Common - not rechargable - gradually discharges when in storage(All of the above)
Solenoid and Relay(both A and B)

35. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10%
Choke
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
How much potential difference can a material withstand before breaking down

36. How do static charges distribute themselves?
Bonding and grounding
First digit is 9
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
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)

37. Identify the blueprint symbol for resistors.
Stranded
Fixed - tapped - variable(all of the above)
20%
--^V^V^V^---

38. What is the relationship between cells and batteries?
Stores electrical charge
15 -000 ohms - 20%
Cells can be connected together to make a battery
American wire gauge(AWG)

39. What does Ohm's Law represent?
Does not move
Opposes any change in the current flowing in a circuit
Relationship between current and potential difference
Cell

40. What makes electrons flow?
Moving vehicles
Insulation resistance and Dielectric strength(Both A and B)
Potential difference
A difference in potential energy

41. What does a first band of white mean?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
First digit is 9
Purging
Volts

42. In most applications - what remains constant if the current remains constant and flows in one direction?
12 volts
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Relationship between current and potential difference
Electromagnetic field

43. When reading resistance color codes - what does the fourth band indicate?
Tolerence
50 Ohms
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Potential difference

44. To what measurement do the conductor mills refer?
1 watt
1/1000th of an inch
Alternating current
Silver

45. What is a wire classification?
The direction the negative charge moves
Bare - covered - insulated - stranded - cable(All of the above)
Use an effect to produce another effect
Series circuit

46. What type of circuit has one path of follow through a load?
Series circuit
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Serial
Electrical resistance against the flow of current

47. What is the unit of measurement of potential difference?
Volts
Amperes
Secondary cell
Symbol

48. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Electromagnetic field
The relationship of potential difference to current
Current change in a coil creates a magnetic change
Mutual induction

49. What is the relationship of conductor size and length to resistance?
Secondary cell
Mutual induction
American wire gauge(AWG)
Resistance increases as the conductor length increases

50. What is voltage?
DC current
Stores electrical charge
A difference in potential energy
50 Ohms