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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. When reading resistance color codes - what does the fourth band indicate?
Tolerence
A magnetic field
Chemical action
Area and spacing of capacitor - static current in the capacitor(both A and B)

2. Identify the blueprint symbol for resistors.
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
The direction of the magnetic field
--^V^V^V^---
Purging

3. What is the relationship between cells and batteries?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
1/1000th of an inch
Cells can be connected together to make a battery
Circular and square mills(Both A and B)

4. What is the name for electrical resistance of insulation?
Insulation resistance
High resistance
Cables
Alternating current

5. What instrument measures voltage?
Stores electrical charge
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Voltmeter
20%

6. What is the term for doing work at the rate of joule per second?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
75 Ohms
1 watt
Start with the band on the end and read to the center

7. What is an arrangement of materials that create a potential difference by chemistry?
Use an effect to produce another effect
Cell
Alternating current
Amperes

8. What is a common form used in conductors?
Series circuit
Bonding and grounding
Cables
Electromagnetism

9. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Parallel
10
Secondary cell
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

10. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
Serial
Alternating current
Potential difference

11. What type of circuit has one path of follow through a load?
Plastic - Rubber - Friction(all of the above)
Potential difference
Series circuit
Fixed - tapped - variable(all of the above)

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

13. What can permanently break down a capacitor?
Breakdown voltage
The direction the negative charge moves
Plastic - Rubber - Friction(all of the above)
Use an effect to produce another effect

14. What is the difference between AC and DC?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
By their covering
High resistance
DC flows continuously in one direction and AC potential difference and current both change direction

15. The thermocouple uses which method for creating potential energy?
Heat
Moving vehicles
Circular and square mills(Both A and B)
Battery

16. What is a wire classification?
A magnetic field
Bare - covered - insulated - stranded - cable(All of the above)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)

17. What is the unit of measurement of resistance?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
A magnetic field
Purging
Ohms

18. What does a first band of white mean?
First digit is 9
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Symbol
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)

19. Where do the fingers point in both Left-Hand Rules?
15 -000 ohms - 20%
10%
Electromagnetism
The direction of the magnetic field

20. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Resistance increases as the conductor length increases
15 -000 ohms - 20%
First digit is 9

21. What is the purpose of a raceway?
20%
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
DC current
Cell

22. What is a type of mechanical transducer?
Breakdown voltage
15 -000 ohms - 20%
Solenoid and Relay(both A and B)
Potential difference - E*I - current times current change from point to point(all of the above)

23. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Serial
Solenoid and Relay(both A and B)
Insulation resistance and Dielectric strength(Both A and B)
From the negative battery terminal to the positive terminal

24. In most applications - what remains constant if the current remains constant and flows in one direction?
Bare - covered - insulated - stranded - cable(All of the above)
Serial
Electromagnetic field
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

25. To what measurement do the conductor mills refer?
1/1000th of an inch
DC current
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Serial

26. What is an electromagnet?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Insulation resistance and Dielectric strength(Both A and B)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Moving vehicles

27. 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
12 volts
Potential difference
10%
Unlike poles attract

28. What type of circuit has two or more paths for current to follow?
Volts
Symbol
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Parallel circuit

29. How do you read resistor color codes?
20%
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Symbol
Start with the band on the end and read to the center

30. What is induction?
Current change in a coil creates a magnetic change
Current flows in one direction - potential differences across a load does not change(Both A and B)
Composition of the resistor
Fixed - tapped - variable(all of the above)

31. What is the relationship between magnetism and electricity?
Secondary cell
Ability to store an electric charge
Unlike poles attract
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)

32. What is a switch that operates by electricity?
Strength of the charge
Grounding wire
Relay
Purging

33. What is voltage?
--^V^V^V^---
Bonding and grounding
A difference in potential energy
Wire splices

34. What is a property of inductors in electrical circuits?
Opposes any change in the current flowing in a circuit
Parallel
Start with the band on the end and read to the center
Cells can be connected together to make a battery

35. What is dielectric strength?
How much potential difference can a material withstand before breaking down
75 Ohms
Common - not rechargable - gradually discharges when in storage(All of the above)
Strength of the charge

36. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
75 Ohms
Purging
Parallel

37. What is the measure of potential difference?
Symbol
Cables
Composition of the resistor
Volts

38. What is true about a dry cell?
Electrical resistance against the flow of current
Common - not rechargable - gradually discharges when in storage(All of the above)
Resistance increases as the conductor length increases
Potential difference - E*I - current times current change from point to point(all of the above)

39. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10%
Cells can be connected together to make a battery
1/1000th of an inch
The direction of the magnetic field

40. Which of the following materials is NOT a good conductor?
1 watt
Heat and current control(both a and c)
Chemical action
Porcelain

41. Why is the transformer important to AC electricity?

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42. What is insulation resistance?
Electrical resistance against the flow of current
Relay
Porcelain
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

43. What does a third band of brown mean?
Parallel
10
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Symbol

44. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Serial
Voltage
Purging
Parallel circuit

45. What do transducers do in electrical terms?
Relay
Voltage
Use an effect to produce another effect
The direction the negative charge moves

46. How many kinds of poles do magnets have?
Opposition to movement of free electrons
Two
Produce heat - light - or limit current to control it(all of the above)
Symbol

47. When does a DC circuit oppose current flow?
Moving vehicles
Magnetic properties
Potential difference - E*I - current times current change from point to point(all of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

48. What is a characteristic of a fixed resistor?
Porcelain
Resistance value can not be changed
Cell
50 Ohms

49. What does resistance produce?
Parallel circuit
Heat
Relationship between current and potential difference
Moving vehicles

50. What is the purpose of resistors in electrical circuits?
Relationship between current and potential difference
Produce heat - light - or limit current to control it(all of the above)
Serial
20%