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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. How is the heat production measured in a resistor?
Potential difference - E*I - current times current change from point to point(all of the above)
Fixed - tapped - variable(all of the above)
American wire gauge(AWG)
Fixed - Electrolytic - Variable(all of the above)

2. When reading resistance color codes - what does the first band indicate?
First digit
Purging
Potential difference - E*I - current times current change from point to point(all of the above)
Breakdown voltage

3. What is power?
50 Ohms
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
The rate of doing work
1 watt

4. What is the purpose of resistors in electrical circuits?
First digit is 9
Does not move
The relationship of potential difference to current
Produce heat - light - or limit current to control it(all of the above)

5. What determines the resistance of a resistor?
Composition of the resistor
Symbol
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)

6. What do junction boxes protect?
Wire splices
Cables
Chemical action
Serial

7. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Stores electrical charge
10%
10

8. What is a common form used in conductors?
Wire splices
Insulation resistance and Dielectric strength(Both A and B)
Cables
Serial

9. What is a conductor?
The direction of the magnetic field
12 volts
Silver
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

10. Which material has the lowest resistance at ordinary temperatures?
Fixed - Electrolytic - Variable(all of the above)
Volts
Energy
Silver

11. What does Ohm's Law represent?
Ability to store an electric charge
Insulation resistance
Relationship between current and potential difference
Circular and square mills(Both A and B)

12. What is the type of cable composed of many fine wires?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Symbol
Stranded
Cables

13. What does a third band of brown mean?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
From the negative battery terminal to the positive terminal
10
10%

14. What is an arrangement of materials that create a potential difference by chemistry?
Cells can be connected together to make a battery
Cell
Symbol
American wire gauge(AWG)

15. What is the purpose of a raceway?
Tolerence
Ability to store an electric charge
Energy
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

16. When reading resistance color codes - what does the fourth band indicate?
Voltage
Heat
Cables
Tolerence

17. What are the common units of measurement for round and square conductor cross - sections?
Cables
Use an effect to produce another effect
Parallel
Circular and square mills(Both A and B)

18. The thermocouple uses which method for creating potential energy?
Use an effect to produce another effect
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Heat
Heat and current control(both a and c)

19. What is a way to classify wires and cables?
50 Ohms
The direction of the magnetic field
Opposes any change in the current flowing in a circuit
By their covering

20. Identify the blueprint symbol for resistors.
10%
Symbol
Fixed - tapped - variable(all of the above)
--^V^V^V^---

21. What does a first band of white mean?
Heat
First digit is 9
The direction of the magnetic field
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

22. Which way is the current going in the circuit shown?(electron flow)
Electromagnetism
From the negative battery terminal to the positive terminal
High resistance
The direction of the magnetic field

23. What is a common measure of wire diameter?
Solenoid and Relay(both A and B)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Bonding and grounding
Gauge number

24. What is the term for doing work at the rate of joule per second?
1 watt
Breakdown voltage
DC current
Opposition to electrical current

25. What makes electrons flow?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Electromagnetic field
Potential difference
The direction of the magnetic field

26. What is a rigid metal conduit?
Potential difference - E*I - current times current change from point to point(all of the above)
Insulation resistance
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)

27. What is resistance?
By their covering
Strength of the charge
Opposition to movement of free electrons
Cables

28. What does static electricity do?
Energy
Does not move
10%
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

29. What is an electromagnet?
Use an effect to produce another effect
Volts
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Opposes any change in the current flowing in a circuit

30. What type of circuit has two or more paths for current to follow?
Resistance increases as the conductor length increases
Parallel circuit
The rate of doing work
The relationship of potential difference to current

31. Identify the general blueprint symbol for inductors.
Current flows in one direction - potential differences across a load does not change(Both A and B)
Symbol
A difference in potential energy
Voltmeter

32. What is true about a dry cell?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Common - not rechargable - gradually discharges when in storage(All of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Stranded

33. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Two
Electromagnetism
Alternating current

34. What is a type of mechanical transducer?
Breakdown voltage
Alternating current
Potential difference
Solenoid and Relay(both A and B)

35. Identify the blueprint symbol for capacitors.
Potential difference
Energy
Symbol
Common - not rechargable - gradually discharges when in storage(All of the above)

36. 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)
15 -000 ohms - 20%
Electrical resistance against the flow of current
How much potential difference can a material withstand before breaking down

37. What determines whether a spark can be produced?
12 volts
Strength of the charge
5%
First digit is 9

38. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
10%
Serial
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

39. What is a DC circuit characteristic?
Energy
Voltage
DC flows continuously in one direction and AC potential difference and current both change direction
Current flows in one direction - potential differences across a load does not change(Both A and B)

40. What is the relationship between magnetism and electricity?
20%
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)
Voltage
Solenoid and Relay(both A and B)

41. What must be large enough to carry the largest current likely to occur?
Bonding and grounding
Grounding wire
Resistance value can not be changed
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

42. How many kinds of poles do magnets have?
Potential difference
1 watt
Two
Electrical resistance against the flow of current

43. The dry cell is what method for creating potential energy?
Voltage
Ohms
Chemical action
--^V^V^V^---

44. What is a common cause of static electricity in a shop?
Moving vehicles
Gauge number
Alternating current
The direction the negative charge moves

45. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Secondary cell
Breakdown voltage
Choke
Voltage

46. What is capacitance in electrical terms?
Relay
Solenoid and Relay(both A and B)
Ability to store an electric charge
Choke

47. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Purging
Resistance value can not be changed
Energy
Bare - covered - insulated - stranded - cable(All of the above)

48. To what measurement do the conductor mills refer?
High resistance
1/1000th of an inch
The direction the negative charge moves
Choke

49. What is the difference between AC and DC?
Cell
Heat
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
DC flows continuously in one direction and AC potential difference and current both change direction

50. What do transducers do in electrical terms?
Use an effect to produce another effect
Bonding and grounding
Unlike poles attract
Circular and square mills(Both A and B)