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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. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
5%
20%
--^V^V^V^---
Cells can be connected together to make a battery

2. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
Secondary cell
Bonding and grounding
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

3. When reading resistance color codes - what does the fourth band indicate?
Tolerence
Two
10
Silver

4. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Electromagnetism
Strength of the charge
Does not move
Purging

5. What is dielectric strength?
Ability to store an electric charge
Bonding and grounding
The direction of the magnetic field
How much potential difference can a material withstand before breaking down

6. What do junction boxes protect?
Opposition to electrical current
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)
Wire splices
Volts

7. What do transducers do in electrical terms?
Gauge number
Use an effect to produce another effect
Opposition to electrical current
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

8. What are the common units of measurement for round and square conductor cross - sections?
Use an effect to produce another effect
Circular and square mills(Both A and B)
Ability to store an electric charge
Electromagnetism

9. Where does the thumb point in both Left-Hand Rules?
Wire splices
The direction the negative charge moves
Common - not rechargable - gradually discharges when in storage(All of the above)
Volts

10. What is the unit of measurement of resistance?
Resistance value can not be changed
Ohms
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)
Electromagnetic field

11. What information do the Left-Hand Rules provide?
The direction the negative charge moves
Relay
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Cells can be connected together to make a battery

12. What instrument measures voltage?
10%
Relay
Voltmeter
Cables

13. What is a way to classify wires and cables?
By their covering
The direction of the magnetic field
The rate of doing work
Symbol

14. Which way is the current going in the circuit shown?(electron flow)
From the negative battery terminal to the positive terminal
5%
Unlike poles attract
75 Ohms

15. What is resistance in electrical terms?
Amperes
Resistance increases as the conductor length increases
Opposition to electrical current
Cells can be connected together to make a battery

16. What is a DC circuit characteristic?
Relationship between current and potential difference
Moving vehicles
First digit
Current flows in one direction - potential differences across a load does not change(Both A and B)

17. What is the name for electrical resistance of insulation?
Fixed - Electrolytic - Variable(all of the above)
Start with the band on the end and read to the center
Insulation resistance
Current flows in one direction - potential differences across a load does not change(Both A and B)

18. What is the term for two or more cells attached together?
Battery
Magnetic properties
Volts
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. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
5%
Wire splices
Mutual induction
Unlike poles attract

20. A resistor is color coded brown - green - orange. What is its resistance?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
10
15 -000 ohms - 20%
Parallel circuit

21. Where do the fingers point in both Left-Hand Rules?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Silver
Solenoid and Relay(both A and B)
The direction of the magnetic field

22. What must be large enough to carry the largest current likely to occur?
Grounding wire
Tolerence
Heat
The relationship of potential difference to current

23. What does a transformer transform?
Strength of the charge
Does not move
Magnetic properties
The relationship of potential difference to current

24. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Unlike poles attract
Serial
Produce heat - light - or limit current to control it(all of the above)
Opposes any change in the current flowing in a circuit

25. What do we call the ability to do work?
Plastic - Rubber - Friction(all of the above)
Energy
Insulation resistance
Volts

26. What is needed for electric heating elements and the filaments of light bulbs?
Potential difference
Parallel circuit
Choke
High resistance

27. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
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)
Relationship between current and potential difference
50 Ohms
Voltage

28. The dry cell is what method for creating potential energy?
Cell
Opposition to movement of free electrons
Chemical action
Start with the band on the end and read to the center

29. Which of the following materials is NOT a good conductor?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Stores electrical charge
Porcelain
Two

30. How is the heat production measured in a resistor?
5%
Common - not rechargable - gradually discharges when in storage(All of the above)
Potential difference - E*I - current times current change from point to point(all of the above)
Alternating current

31. Identify the general blueprint symbol for inductors.
Heat
Symbol
20%
Resistance value can not be changed

32. What is a characteristic of insulators?
The direction of the magnetic field
Porcelain
Insulation resistance
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

33. What is a common form used in conductors?
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)
Moving vehicles
Cables
Voltmeter

34. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
Mutual induction
DC current
Electromagnetism

35. What does a moving charge produce?
American wire gauge(AWG)
A magnetic field
Opposes any change in the current flowing in a circuit
Symbol

36. What wire measurement is commonly used in the U.S.?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
American wire gauge(AWG)
Cells can be connected together to make a battery
Unlike poles attract

37. Identify the blueprint symbol for capacitors.
Resistance increases as the conductor length increases
Resistance value can not be changed
Opposes any change in the current flowing in a circuit
Symbol

38. How do you read resistor color codes?
The relationship of potential difference to current
Electromagnetism
How much potential difference can a material withstand before breaking down
Start with the band on the end and read to the center

39. What cannot be transformed to higher or lower potential differences?
Cells can be connected together to make a battery
DC current
Volts
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

40. What type of circuit has one path of follow through a load?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Series circuit
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

41. What is a rigid metal conduit?
By their covering
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Stores electrical charge
Magnetic properties

42. When reading resistance color codes - what does the first band indicate?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Opposition to movement of free electrons
50 Ohms
First digit

43. Which type of cell can be recharged?
Circular and square mills(Both A and B)
Secondary cell
Potential difference
Cables

44. How is capacitance determined?
--^V^V^V^---
Area and spacing of capacitor - static current in the capacitor(both A and B)
Cells can be connected together to make a battery
75 Ohms

45. What is the type of cable composed of many fine wires?
Stranded
Circular and square mills(Both A and B)
Cell
50 Ohms

46. What is the use of the electromagnet?
12 volts
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Secondary cell
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

47. What is an arrangement of materials that create a potential difference by chemistry?
Parallel
Solenoid and Relay(both A and B)
Cell
Current flows in one direction - potential differences across a load does not change(Both A and B)

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

49. How do static charges distribute themselves?
Bare - covered - insulated - stranded - cable(All of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
20%
Common - not rechargable - gradually discharges when in storage(All of the above)

50. The thermocouple uses which method for creating potential energy?
Ohms
Heat and current control(both a and c)
Heat
10%