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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. What is another name for an inductor?
Produce heat - light - or limit current to control it(all of the above)
Choke
Potential difference
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

2. Where does the thumb point in both Left-Hand Rules?
How much potential difference can a material withstand before breaking down
10
The direction the negative charge moves
Potential difference - E*I - current times current change from point to point(all of the above)

3. What does static electricity do?
Does not move
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Opposition to electrical current
DC flows continuously in one direction and AC potential difference and current both change direction

4. Which of the following is a type of resistor?
Resistance value can not be changed
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)
Fixed - tapped - variable(all of the above)

5. What is needed for electric heating elements and the filaments of light bulbs?
Voltmeter
DC current
High resistance
Heat

6. What determines the resistance of a resistor?
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)
Composition of the resistor
Heat and current control(both a and c)
Bonding and grounding

7. What is the measure of potential difference?
Ohms
Series circuit
The direction of the magnetic field
Volts

8. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Does not move
Parallel
Parallel circuit
50 Ohms

9. To what measurement do the conductor mills refer?
Energy
1/1000th of an inch
Serial
Bonding and grounding

10. What is the term for doing work at the rate of joule per second?
1 watt
First digit is 9
Bonding and grounding
Insulation resistance

11. What is the unit of measurement of electrical current?
Amperes
--^V^V^V^---
Series circuit
1 watt

12. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Purging
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
20%

13. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
High resistance
10
Amperes

14. What is a rigid metal conduit?
Magnetic properties
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Electromagnetic field
Insulation resistance and Dielectric strength(Both A and B)

15. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Does not move
Serial
Fixed - Electrolytic - Variable(all of the above)
Unlike poles attract

16. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Produce heat - light - or limit current to control it(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
10%

17. What information do the Left-Hand Rules provide?
Secondary cell
Plastic - Rubber - Friction(all of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
American wire gauge(AWG)

18. What is the relationship between cells and batteries?
Parallel
Common - not rechargable - gradually discharges when in storage(All of the above)
Cells can be connected together to make a battery
Parallel circuit

19. What do junction boxes protect?
Wire splices
Opposition to electrical current
Cell
Potential difference

20. How is the heat production measured in a resistor?
Cells can be connected together to make a battery
Potential difference - E*I - current times current change from point to point(all of the above)
1/1000th of an inch
Opposition to movement of free electrons

21. What does a third band of brown mean?
Gauge number
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
10
Produce heat - light - or limit current to control it(all of the above)

22. In most applications - what remains constant if the current remains constant and flows in one direction?
Parallel circuit
Breakdown voltage
Electrical resistance against the flow of current
Electromagnetic field

23. 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
Series circuit
How much potential difference can a material withstand before breaking down
Tolerence
12 volts

24. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Parallel circuit
American wire gauge(AWG)
10
Mutual induction

25. What is a wire classification?
Cell
Electromagnetism
Bare - covered - insulated - stranded - cable(All of the above)
Parallel circuit

26. What is a common cause of static electricity in a shop?
How much potential difference can a material withstand before breaking down
A difference in potential energy
Ability to store an electric charge
Moving vehicles

27. What is the use of the electromagnet?
Opposition to electrical current
Secondary cell
Wire splices
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

28. What is a common measure of wire diameter?
Heat
Gauge number
1/1000th of an inch
Current flows in one direction - potential differences across a load does not change(Both A and B)

29. What is the name for electrical resistance of insulation?
Insulation resistance
Plastic - Rubber - Friction(all of the above)
How much potential difference can a material withstand before breaking down
Parallel

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

31. What is the type of cable composed of many fine wires?
Stranded
Insulation resistance and Dielectric strength(Both A and B)
Opposes any change in the current flowing in a circuit
Electromagnetic field

32. What does resistance produce?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Heat
Fixed - tapped - variable(all of the above)
Insulation resistance

33. What is a type of capacitor?
High resistance
Bare - covered - insulated - stranded - cable(All of the above)
Fixed - Electrolytic - Variable(all of the above)
Ability to store an electric charge

34. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Does not move
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Heat
Alternating current

35. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Voltage
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Purging
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)

36. Where do the fingers point in both Left-Hand Rules?
Fixed - tapped - variable(all of the above)
The direction of the magnetic field
Porcelain
Fixed - Electrolytic - Variable(all of the above)

37. What is a way to classify wires and cables?
By their covering
Magnetic properties
Produce heat - light - or limit current to control it(all of the above)
75 Ohms

38. What does Ohm's Law represent?
1/1000th of an inch
Relationship between current and potential difference
Electromagnetism
Alternating current

39. What instrument measures voltage?
Heat
Voltmeter
From the negative battery terminal to the positive terminal
Serial

40. What is a switch that operates by electricity?
Energy
A difference in potential energy
Porcelain
Relay

41. How many kinds of poles do magnets have?
Volts
Insulation resistance and Dielectric strength(Both A and B)
Two
Amperes

42. What do we call the ability to do work?
Choke
Energy
--^V^V^V^---
The rate of doing work

43. A resistor is color coded brown - green - orange. What is its resistance?
10%
15 -000 ohms - 20%
Gauge number
Choke

44. What do transducers do in electrical terms?
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)
Purging
Series circuit
Use an effect to produce another effect

45. What is the difference between AC and DC?
DC flows continuously in one direction and AC potential difference and current both change direction
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Series circuit
Cell

46. What wire measurement is commonly used in the U.S.?
American wire gauge(AWG)
10
Bonding and grounding
Parallel

47. What is the unit of measurement of resistance?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Porcelain
Choke
Ohms

48. 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
Amperes
The rate of doing work
75 Ohms
Porcelain

49. What is the basic law of magnetic force?
Opposes any change in the current flowing in a circuit
15 -000 ohms - 20%
Unlike poles attract
Cells can be connected together to make a battery

50. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
5%
Mutual induction
Energy
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)