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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 a common form used in conductors?
Cables
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Symbol
Fixed - Electrolytic - Variable(all of the above)

2. What is the difference between AC and DC?
Electromagnetic field
DC flows continuously in one direction and AC potential difference and current both change direction
1/1000th of an inch
Strength of the charge

3. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
DC current
Choke
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

4. What is the relationship of conductor size and length to resistance?
10
Resistance increases as the conductor length increases
Fixed - tapped - variable(all of the above)
By their covering

5. Identify the general blueprint symbol for inductors.
Fixed - Electrolytic - Variable(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Symbol
Gauge number

6. How many kinds of poles do magnets have?
Two
Chemical action
Relationship between current and potential difference
10

7. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Electromagnetic field

8. What is voltage?
Series circuit
Ability to store an electric charge
50 Ohms
A difference in potential energy

9. What is capacitance in electrical terms?
The direction of the magnetic field
Ability to store an electric charge
Symbol
Porcelain

10. Which of the following materials is NOT a good conductor?
Porcelain
American wire gauge(AWG)
Circular and square mills(Both A and B)
Bonding and grounding

11. What is the relationship between cells and batteries?
Alternating current
Cells can be connected together to make a battery
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Secondary cell

12. What is another name for an inductor?
Amperes
Choke
Voltage
Opposes any change in the current flowing in a circuit

13. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
20%
Circular and square mills(Both A and B)
Symbol

14. To what measurement do the conductor mills refer?
Resistance value can not be changed
A difference in potential energy
Symbol
1/1000th of an inch

15. The thermocouple uses which method for creating potential energy?
DC flows continuously in one direction and AC potential difference and current both change direction
Heat
Volts
Resistance increases as the conductor length increases

16. What is the unit of measurement of electrical current?
Amperes
Electromagnetic field
Produce heat - light - or limit current to control it(all of the above)
Symbol

17. What are the names of two of the six primary methods of producing a voltage?
Electrical resistance against the flow of current
Heat
1/1000th of an inch
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

18. How is the heat production measured in a resistor?
Fixed - tapped - variable(all of the above)
Insulation resistance and Dielectric strength(Both A and B)
Cell
Potential difference - E*I - current times current change from point to point(all of the above)

19. What is dielectric strength?
Electromagnetic field
How much potential difference can a material withstand before breaking down
Area and spacing of capacitor - static current in the capacitor(both A and B)
Insulation resistance and Dielectric strength(Both A and B)

20. The dry cell is what method for creating potential energy?
Chemical action
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Silver
Opposition to electrical current

21. 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
Does not move
12 volts
Energy
10

22. What do transducers do in electrical terms?
Potential difference
Use an effect to produce another effect
Current change in a coil creates a magnetic change
1/1000th of an inch

23. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Two
Resistance value can not be changed
The rate of doing work
5%

24. What does a transformer transform?
Relay
Does not move
The relationship of potential difference to current
Gauge number

25. What is a wire classification?
Cables
Bare - covered - insulated - stranded - cable(All of the above)
Does not move
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

26. The generator is what method of creating potential energy?
Amperes
Electromagnetism
Resistance value can not be changed
Bonding and grounding

27. What is a common cause of static electricity in a shop?
Moving vehicles
Ability to store an electric charge
Current flows in one direction - potential differences across a load does not change(Both A and B)
Wire splices

28. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Fixed - Electrolytic - Variable(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Mutual induction
20%

29. What types of protective tapes are used?
Insulation resistance and Dielectric strength(Both A and B)
How much potential difference can a material withstand before breaking down
Mutual induction
Plastic - Rubber - Friction(all of the above)

30. What can permanently break down a capacitor?
Breakdown voltage
The relationship of potential difference to current
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
10%

31. What is a characteristic of a fixed resistor?
Current change in a coil creates a magnetic change
Does not move
Current flows in one direction - potential differences across a load does not change(Both A and B)
Resistance value can not be changed

32. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Relay
75 Ohms
Grounding wire

33. What is a way to classify wires and cables?
Electrical resistance against the flow of current
The direction of the magnetic field
Two
By their covering

34. What determines the resistance of a resistor?
Heat
Moving vehicles
Composition of the resistor
Insulation resistance and Dielectric strength(Both A and B)

35. How do you read resistor color codes?
Start with the band on the end and read to the center
American wire gauge(AWG)
A difference in potential energy
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

36. What determines whether a spark can be produced?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Strength of the charge
15 -000 ohms - 20%
Silver

37. What is the measure of potential difference?
A magnetic field
Resistance value can not be changed
Breakdown voltage
Volts

38. What does a moving charge produce?
Solenoid and Relay(both A and B)
75 Ohms
A magnetic field
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

39. What is resistance?
Opposition to movement of free electrons
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Choke
75 Ohms

40. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Magnetic properties
50 Ohms
Plastic - Rubber - Friction(all of the above)

41. What must be large enough to carry the largest current likely to occur?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Opposition to movement of free electrons
Grounding wire

42. When reading resistance color codes - what does the fourth band indicate?
Opposition to electrical current
Heat
Tolerence
Insulation resistance

43. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
High resistance
Moving vehicles
Does not move

44. What type of circuit has two or more paths for current to follow?
5%
Parallel circuit
Use an effect to produce another effect
Unlike poles attract

45. What is a property of inductors in electrical circuits?
10%
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Opposes any change in the current flowing in a circuit
The rate of doing work

46. What does an object have if a magnetic field acts on it?
Relationship between current and potential difference
First digit
Magnetic properties
American wire gauge(AWG)

47. What is true about a dry cell?
Voltage
Alternating current
Solenoid and Relay(both A and B)
Common - not rechargable - gradually discharges when in storage(All of the above)

48. What is a type of mechanical transducer?
Resistance value can not be changed
Use an effect to produce another effect
Voltmeter
Solenoid and Relay(both A and B)

49. What is induction?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Current change in a coil creates a magnetic change
American wire gauge(AWG)
Area and spacing of capacitor - static current in the capacitor(both A and B)

50. Identify the blueprint symbol for resistors.
--^V^V^V^---
Chemical action
First digit is 9
Insulation resistance and Dielectric strength(Both A and B)

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Basic Electricity

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