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Basic Electricity

Instructions:

Answer 50 questions in 15 minutes.
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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 purpose of a raceway?
Produce heat - light - or limit current to control it(all of the above)
Stores electrical charge
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Choke

2. Given E=I X R and the following information - plug in the data and solve the problem for voltage. 0.015 ohms - 800 amps of current
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
12 volts
Unlike poles attract
A difference in potential energy

3. What is an electromagnet?
Stores electrical charge
Heat
Fixed - tapped - variable(all of the above)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

4. What does a transformer transform?
Chemical action
Porcelain
The relationship of potential difference to current
Parallel circuit

5. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Circular and square mills(Both A and B)
Area and spacing of capacitor - static current in the capacitor(both A and B)
10%
Start with the band on the end and read to the center

6. What is the relationship of conductor size and length to resistance?
12 volts
Opposition to movement of free electrons
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Resistance increases as the conductor length increases

7. What makes electrons flow?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Unlike poles attract
Electrical resistance against the flow of current
Potential difference

8. What is a rigid metal conduit?
Insulation resistance
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Tolerence
Relay

9. What does a third band of brown mean?
Volts
10
Voltmeter
Common - not rechargable - gradually discharges when in storage(All of the above)

10. Which type of cell can be recharged?
Does not move
75 Ohms
By their covering
Secondary cell

11. What is a DC circuit characteristic?
--^V^V^V^---
10%
Current flows in one direction - potential differences across a load does not change(Both A and B)
1 watt

12. What are the common units of measurement for round and square conductor cross - sections?
Circular and square mills(Both A and B)
First digit is 9
American wire gauge(AWG)
Produce heat - light - or limit current to control it(all of the above)

13. Which way is the current going in the circuit shown?(electron flow)
Alternating current
Ohms
From the negative battery terminal to the positive terminal
Potential difference

14. What is true about a dry cell?
Chemical action
DC flows continuously in one direction and AC potential difference and current both change direction
1 watt
Common - not rechargable - gradually discharges when in storage(All of the above)

15. What is resistance?
Chemical action
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
1 watt
Opposition to movement of free electrons

16. When does a DC circuit oppose current flow?
Produce heat - light - or limit current to control it(all of the above)
Series circuit
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Breakdown voltage

17. What is the term for two or more cells attached together?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
75 Ohms
Battery
Insulation resistance and Dielectric strength(Both A and B)

18. The dry cell is what method for creating potential energy?
Gauge number
Alternating current
Chemical action
Fixed - Electrolytic - Variable(all of the above)

19. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
Tolerence
Circular and square mills(Both A and B)
Unlike poles attract

20. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Parallel circuit
A magnetic field
A difference in potential energy

21. What do electrical charges need to cause a fire or explosion?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Plastic - Rubber - Friction(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

22. 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
Use an effect to produce another effect
Opposition to electrical current
75 Ohms
Potential difference - E*I - current times current change from point to point(all of the above)

23. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Opposes any change in the current flowing in a circuit
The rate of doing work
5%
Mutual induction

24. What type of circuit has one path of follow through a load?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Series circuit
Heat and current control(both a and c)
Circular and square mills(Both A and B)

25. What can permanently break down a capacitor?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Grounding wire
Potential difference
Breakdown voltage

26. What results when current is run through a material with high resistance?
Breakdown voltage
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Heat and current control(both a and c)
First digit

27. What is a conductor?
Breakdown voltage
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
American wire gauge(AWG)
Magnetic properties

28. What is needed for electric heating elements and the filaments of light bulbs?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
High resistance
First digit is 9
Amperes

29. What is a common cause of static electricity in a shop?
Moving vehicles
Common - not rechargable - gradually discharges when in storage(All of the above)
High resistance
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

30. What does an object have if a magnetic field acts on it?
Magnetic properties
Cells can be connected together to make a battery
Strength of the charge
Current flows in one direction - potential differences across a load does not change(Both A and B)

31. What is the purpose of capacitors in electrical circuits?
Chemical action
Stores electrical charge
Choke
Cells can be connected together to make a battery

32. What makes electrons flow?
Potential difference
First digit
Circular and square mills(Both A and B)
First digit is 9

33. What type of circuit has two or more paths for current to follow?
Porcelain
Parallel circuit
Grounding wire
Bonding and grounding

34. What is power?
Plastic - Rubber - Friction(all of the above)
Silver
The rate of doing work
Heat

35. What is the relationship between cells and batteries?
High resistance
Fixed - Electrolytic - Variable(all of the above)
Cells can be connected together to make a battery
From the negative battery terminal to the positive terminal

36. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
1/1000th of an inch
Fixed - tapped - variable(all of the above)
20%
Insulation resistance

37. What is the name for electrical resistance of insulation?
A magnetic field
Cells can be connected together to make a battery
Current change in a coil creates a magnetic change
Insulation resistance

38. How is capacitance determined?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Grounding wire
Electromagnetic field
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

39. What is a common form used in conductors?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Cables
Relay
Insulation resistance and Dielectric strength(Both A and B)

40. What types of protective tapes are used?
Opposes any change in the current flowing in a circuit
American wire gauge(AWG)
Current change in a coil creates a magnetic change
Plastic - Rubber - Friction(all of the above)

41. What is the difference between AC and DC?
DC flows continuously in one direction and AC potential difference and current both change direction
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Electromagnetic field
Amperes

42. What is the unit of measurement of electrical current?
Amperes
1/1000th of an inch
Two
Purging

43. What is the measure of potential difference?
Volts
Porcelain
Start with the band on the end and read to the center
Cell

44. What is a type of mechanical transducer?
The direction the negative charge moves
Ability to store an electric charge
Solenoid and Relay(both A and B)
Symbol

45. What is a common measure of wire diameter?
Porcelain
Produce heat - light - or limit current to control it(all of the above)
10%
Gauge number

46. What are the two generic methods to eliminate static electricity from metal objects?
Fixed - Electrolytic - Variable(all of the above)
Cells can be connected together to make a battery
DC flows continuously in one direction and AC potential difference and current both change direction
Bonding and grounding

47. What instrument measures voltage?
The rate of doing work
50 Ohms
Symbol
Voltmeter

48. What is resistance in electrical terms?
Relay
The rate of doing work
Heat
Opposition to electrical current

49. To what measurement do the conductor mills refer?
Cell
1/1000th of an inch
Heat
Insulation resistance and Dielectric strength(Both A and B)

50. Identify the blueprint symbol for capacitors.
Insulation resistance
Amperes
Symbol
Fixed - tapped - variable(all of the above)

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Basic Electricity

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