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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 needed for electric heating elements and the filaments of light bulbs?
1/1000th of an inch
High resistance
First digit is 9
American wire gauge(AWG)

2. What is dielectric strength?
How much potential difference can a material withstand before breaking down
Use an effect to produce another effect
Resistance increases as the conductor length increases
Composition of the resistor

3. What is capacitance in electrical terms?
10%
Ability to store an electric charge
Insulation resistance and Dielectric strength(Both A and B)
A difference in potential energy

4. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
American wire gauge(AWG)
Resistance value can not be changed
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

5. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Series circuit
Two
The direction the negative charge moves
Purging

6. The generator is what method of creating potential energy?
Breakdown voltage
First digit
Electromagnetism
--^V^V^V^---

7. What is the term for doing work at the rate of joule per second?
Wire splices
Grounding wire
Battery
1 watt

8. What instrument measures voltage?
Electrical resistance against the flow of current
American wire gauge(AWG)
Solenoid and Relay(both A and B)
Voltmeter

9. What determines whether a spark can be produced?
Opposes any change in the current flowing in a circuit
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Potential difference
Strength of the charge

10. What does a moving charge produce?
Voltage
Silver
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)
A magnetic field

11. Which type of cell can be recharged?
Bare - covered - insulated - stranded - cable(All of the above)
A magnetic field
Area and spacing of capacitor - static current in the capacitor(both A and B)
Secondary cell

12. A resistor is color coded brown - green - orange. What is its resistance?
The rate of doing work
Current change in a coil creates a magnetic change
15 -000 ohms - 20%
Grounding wire

13. What is an electromagnet?
Secondary cell
Solenoid and Relay(both A and B)
Electrical resistance against the flow of current
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

14. How many kinds of poles do magnets have?
Purging
Alternating current
Two
Cell

15. What is induction?
Solenoid and Relay(both A and B)
Resistance value can not be changed
Electrical resistance against the flow of current
Current change in a coil creates a magnetic change

16. What is resistance?
5%
Opposition to movement of free electrons
Electromagnetism
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

17. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Electrical resistance against the flow of current
20%
How much potential difference can a material withstand before breaking down
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

18. What type of circuit has two or more paths for current to follow?
Bare - covered - insulated - stranded - cable(All of the above)
Parallel circuit
Magnetic properties
1 watt

19. What is an arrangement of materials that create a potential difference by chemistry?
Chemical action
DC current
Heat
Cell

20. What makes electrons flow?
Potential difference
Electrical resistance against the flow of current
Parallel
10

21. What is the measure of potential difference?
Electromagnetism
Energy
Volts
Electromagnetic field

22. What is another name for an inductor?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Composition of the resistor
Choke

23. What must be large enough to carry the largest current likely to occur?
Grounding wire
Symbol
Volts
Relay

24. What is a common form used in conductors?
Electrical resistance against the flow of current
Cell
Ohms
Cables

25. What is insulation resistance?
Stores electrical charge
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Choke
Electrical resistance against the flow of current

26. What is the relationship between magnetism and electricity?
Mutual induction
Potential difference
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)
Insulation resistance

27. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
Ability to store an electric charge
Strength of the charge
Gauge number

28. The thermocouple uses which method for creating potential energy?
Heat
Potential difference
Volts
Alternating current

29. What is a property of inductors in electrical circuits?
Opposes any change in the current flowing in a circuit
Cell
Cells can be connected together to make a battery
Grounding wire

30. What are the common units of measurement for round and square conductor cross - sections?
Circular and square mills(Both A and B)
Start with the band on the end and read to the center
Bonding and grounding
Voltmeter

31. What is power?
DC current
Series circuit
How much potential difference can a material withstand before breaking down
The rate of doing work

32. What is a common cause of static electricity in a shop?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
The rate of doing work
Composition of the resistor
Moving vehicles

33. What can permanently break down a capacitor?
Breakdown voltage
50 Ohms
The rate of doing work
Energy

34. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Serial
Heat
By their covering

35. What do electrical charges need to cause a fire or explosion?
How much potential difference can a material withstand before breaking down
Voltage
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)

36. What is the term for two or more cells attached together?
12 volts
By their covering
Battery
DC flows continuously in one direction and AC potential difference and current both change direction

37. Which of the following materials is NOT a good conductor?
Strength of the charge
Opposition to movement of free electrons
Porcelain
Voltmeter

38. When does a DC circuit oppose current flow?
Bonding and grounding
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Electrical resistance against the flow of current
Ability to store an electric charge

39. Which material has the lowest resistance at ordinary temperatures?
Stores electrical charge
Silver
Fixed - Electrolytic - Variable(all of the above)
Potential difference

40. What is a characteristic of insulators?
First digit
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Volts
Ohms

41. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Potential difference
10%
Serial
Cells can be connected together to make a battery

42. Identify the blueprint symbol for capacitors.
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Symbol
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Strength of the charge

43. What is resistance in electrical terms?
Bare - covered - insulated - stranded - cable(All of the above)
Insulation resistance
Opposition to electrical current
Parallel circuit

44. What makes electrons flow?
Gauge number
Potential difference
The direction the negative charge moves
Symbol

45. What cannot be transformed to higher or lower potential differences?
Breakdown voltage
Voltage
12 volts
DC current

46. The dry cell is what method for creating potential energy?
Resistance value can not be changed
Chemical action
Breakdown voltage
Alternating current

47. What does a first band of white mean?
Plastic - Rubber - Friction(all of the above)
Voltmeter
First digit is 9
The direction the negative charge moves

48. What does resistance produce?
Start with the band on the end and read to the center
Battery
Heat
Tolerence

49. 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
Opposition to electrical current
12 volts
Silver
American wire gauge(AWG)

50. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Series circuit
10%
Wire splices
Mutual induction