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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. Where does the thumb point in both Left-Hand Rules?
The direction the negative charge moves
Insulation resistance and Dielectric strength(Both A and B)
Symbol
From the negative battery terminal to the positive terminal

2. What is the term for doing work at the rate of joule per second?
Heat and current control(both a and c)
1 watt
Magnetic properties
By their covering

3. What information do the Left-Hand Rules provide?
Electromagnetism
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Does not move

4. What are the names of two of the six primary methods of producing a voltage?
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)
Voltmeter
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
American wire gauge(AWG)

5. What is capacitance in electrical terms?
American wire gauge(AWG)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Ability to store an electric charge
Cells can be connected together to make a battery

6. How do you read resistor color codes?
Opposition to electrical current
Start with the band on the end and read to the center
Series circuit
Bonding and grounding

7. What types of protective tapes are used?
Breakdown voltage
Opposition to electrical current
A magnetic field
Plastic - Rubber - Friction(all of the above)

8. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Moving vehicles
Voltage
Heat and current control(both a and c)

9. What does a moving charge produce?
Use an effect to produce another effect
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Cell
A magnetic field

10. What is a common cause of static electricity in a shop?
Moving vehicles
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Purging

11. The thermocouple uses which method for creating potential energy?
Heat
Cells can be connected together to make a battery
Magnetic properties
Symbol

12. What is power?
Series circuit
Resistance increases as the conductor length increases
DC flows continuously in one direction and AC potential difference and current both change direction
The rate of doing work

13. What is dielectric strength?
Potential difference - E*I - current times current change from point to point(all of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)
How much potential difference can a material withstand before breaking down
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

14. What is a rigid metal conduit?
Tolerence
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Voltmeter
Unlike poles attract

15. Which of the following is a type of resistor?
Stranded
Area and spacing of capacitor - static current in the capacitor(both A and B)
Fixed - tapped - variable(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

16. What instrument measures voltage?
Voltage
Current change in a coil creates a magnetic change
Voltmeter
From the negative battery terminal to the positive terminal

17. What is the use of the electromagnet?
Common - not rechargable - gradually discharges when in storage(All of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
A magnetic field

18. What is the name for electrical resistance of insulation?
Insulation resistance
American wire gauge(AWG)
Plastic - Rubber - Friction(all of the above)
First digit

19. 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
12 volts
Ohms
Opposes any change in the current flowing in a circuit
75 Ohms

20. What must be large enough to carry the largest current likely to occur?
Stranded
Grounding wire
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Heat

21. What is a type of capacitor?
Series circuit
Voltage
Fixed - Electrolytic - Variable(all of the above)
The direction of the magnetic field

22. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Gauge number
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
10%
DC flows continuously in one direction and AC potential difference and current both change direction

23. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Resistance value can not be changed
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Mutual induction
Series circuit

24. What is an electromagnet?
Bare - covered - insulated - stranded - cable(All of the above)
10
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
75 Ohms

25. When reading resistance color codes - what does the first band indicate?
First digit
By their covering
Bare - covered - insulated - stranded - cable(All of the above)
Relay

26. Which material has the lowest resistance at ordinary temperatures?
Silver
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Cell
Amperes

27. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Stranded
Purging
Volts
--^V^V^V^---

28. To what measurement do the conductor mills refer?
Parallel
1/1000th of an inch
Ohms
Insulation resistance

29. What is a wire classification?
Potential difference
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
20%
Bare - covered - insulated - stranded - cable(All of the above)

30. What are the common units of measurement for round and square conductor cross - sections?
--^V^V^V^---
Alternating current
Potential difference - E*I - current times current change from point to point(all of the above)
Circular and square mills(Both A and B)

31. What is the type of cable composed of many fine wires?
Opposition to electrical current
Heat and current control(both a and c)
The direction of the magnetic field
Stranded

32. What is the unit of measurement of electrical current?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Amperes
The rate of doing work
Current change in a coil creates a magnetic change

33. A resistor is color coded brown - green - orange. What is its resistance?
Breakdown voltage
15 -000 ohms - 20%
A difference in potential energy
A magnetic field

34. What is a common form used in conductors?
From the negative battery terminal to the positive terminal
Battery
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Cables

35. What are the two generic methods to eliminate static electricity from metal objects?
Bonding and grounding
The rate of doing work
Parallel circuit
Fixed - Electrolytic - Variable(all of the above)

36. What is insulation resistance?
Breakdown voltage
Mutual induction
Electrical resistance against the flow of current
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)

37. When does a DC circuit oppose current flow?
Voltage
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Potential difference
50 Ohms

38. What is the basic law of magnetic force?
The rate of doing work
Ohms
Insulation resistance and Dielectric strength(Both A and B)
Unlike poles attract

39. What is the purpose of a raceway?
Two
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Breakdown voltage
Moving vehicles

40. The generator is what method of creating potential energy?
5%
Electromagnetism
Volts
The rate of doing work

41. What is a common measure of wire diameter?
Chemical action
Potential difference
Gauge number
Produce heat - light - or limit current to control it(all of the above)

42. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Tolerence
Serial
Opposition to electrical current
Cells can be connected together to make a battery

43. What makes electrons flow?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Potential difference
Cell
5%

44. What do we call the ability to do work?
Two
Energy
50 Ohms
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

45. What is the purpose of capacitors in electrical circuits?
Resistance value can not be changed
Porcelain
Stores electrical charge
Cables

46. What is resistance in electrical terms?
50 Ohms
Area and spacing of capacitor - static current in the capacitor(both A and B)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Opposition to electrical current

47. When reading resistance color codes - what does the fourth band indicate?
Solenoid and Relay(both A and B)
Tolerence
Wire splices
Ability to store an electric charge

48. How is capacitance determined?
Strength of the charge
Fixed - tapped - variable(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Moving vehicles

49. What is a DC circuit characteristic?
High resistance
Current flows in one direction - potential differences across a load does not change(Both A and B)
Cells can be connected together to make a battery
12 volts

50. Identify the general blueprint symbol for inductors.
Symbol
Start with the band on the end and read to the center
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Mutual induction