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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 a type of capacitor?
A magnetic field
Electrical resistance against the flow of current
Moving vehicles
Fixed - Electrolytic - Variable(all of the above)

2. What is a common cause of static electricity in a shop?
Relationship between current and potential difference
Ability to store an electric charge
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Moving vehicles

3. What is the type of cable composed of many fine wires?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Stranded
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Heat

4. What does a third band of brown mean?
The rate of doing work
Ability to store an electric charge
10
From the negative battery terminal to the positive terminal

5. What is a DC circuit characteristic?
Opposes any change in the current flowing in a circuit
Current flows in one direction - potential differences across a load does not change(Both A and B)
Unlike poles attract
Insulation resistance

6. What is the name for electrical resistance of insulation?
Ability to store an electric charge
The relationship of potential difference to current
Insulation resistance
Purging

7. What does static electricity do?
Does not move
50 Ohms
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Electrical resistance against the flow of current

8. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Heat
Plastic - Rubber - Friction(all of the above)
--^V^V^V^---
5%

9. Which material has the lowest resistance at ordinary temperatures?
Produce heat - light - or limit current to control it(all of the above)
Silver
--^V^V^V^---
The direction of the magnetic field

10. What is a common form used in conductors?
Cables
20%
Series circuit
Strength of the charge

11. What makes electrons flow?
Unlike poles attract
Potential difference
Purging
Symbol

12. What information do the Left-Hand Rules provide?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Breakdown voltage
Grounding wire
Opposes any change in the current flowing in a circuit

13. What is the relationship between magnetism and electricity?
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)
75 Ohms
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Cells can be connected together to make a battery

14. What is a way to classify wires and cables?
How much potential difference can a material withstand before breaking down
Volts
Serial
By their covering

15. What is another name for an inductor?
Bare - covered - insulated - stranded - cable(All of the above)
Chemical action
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Choke

16. What does a transformer transform?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
The relationship of potential difference to current
Alternating current
Heat and current control(both a and c)

17. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
1/1000th of an inch
Two
Volts

18. How many kinds of poles do magnets have?
How much potential difference can a material withstand before breaking down
High resistance
Two
Heat

19. A resistor is color coded brown - green - orange. What is its resistance?
5%
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Parallel circuit
15 -000 ohms - 20%

20. What wire measurement is commonly used in the U.S.?
1/1000th of an inch
The rate of doing work
By their covering
American wire gauge(AWG)

21. How do you read resistor color codes?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Start with the band on the end and read to the center
Circular and square mills(Both A and B)
Parallel circuit

22. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
20%
Parallel circuit
Does not move
The direction of the magnetic field

23. What is the unit of measurement of electrical current?
10
Amperes
Secondary cell
50 Ohms

24. What is resistance in electrical terms?
Opposition to electrical current
How much potential difference can a material withstand before breaking down
Bare - covered - insulated - stranded - cable(All of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

25. How is capacitance determined?
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)
Voltage
Area and spacing of capacitor - static current in the capacitor(both A and B)
Alternating current

26. Which of the following materials is NOT a good conductor?
Porcelain
Start with the band on the end and read to the center
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)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

27. In most applications - what remains constant if the current remains constant and flows in one direction?
1/1000th of an inch
Stranded
Heat and current control(both a and c)
Electromagnetic field

28. What do we call the ability to do work?
Mutual induction
Energy
The direction the negative charge moves
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

29. Which way is the current going in the circuit shown?(electron flow)
From the negative battery terminal to the positive terminal
High resistance
Circular and square mills(Both A and B)
Potential difference

30. What is capacitance in electrical terms?
Breakdown voltage
1/1000th of an inch
Ability to store an electric charge
Symbol

31. What determines the resistance of a resistor?
Composition of the resistor
Parallel
Resistance increases as the conductor length increases
Use an effect to produce another effect

32. What does a moving charge produce?
DC flows continuously in one direction and AC potential difference and current both change direction
Bare - covered - insulated - stranded - cable(All of the above)
A magnetic field
Stores electrical charge

33. Which type of cell can be recharged?
Opposes any change in the current flowing in a circuit
Secondary cell
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
The relationship of potential difference to current

34. Identify the general blueprint symbol for inductors.
Symbol
Relationship between current and potential difference
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Mutual induction

35. What is the difference between AC and DC?
The relationship of potential difference to current
DC flows continuously in one direction and AC potential difference and current both change direction
Resistance increases as the conductor length increases
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

36. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
Resistance value can not be changed
Magnetic properties
50 Ohms

37. Identify the blueprint symbol for resistors.
Fixed - Electrolytic - Variable(all of the above)
American wire gauge(AWG)
--^V^V^V^---
Two

38. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
Magnetic properties
--^V^V^V^---
Volts

39. What is a type of mechanical transducer?
Use an effect to produce another effect
Solenoid and Relay(both A and B)
Strength of the charge
Fixed - Electrolytic - Variable(all of the above)

40. What is true about a dry cell?
Stranded
Heat
Common - not rechargable - gradually discharges when in storage(All of the above)
Resistance value can not be changed

41. What is the term for two or more cells attached together?
Symbol
10
Battery
10%

42. What is dielectric strength?
Insulation resistance and Dielectric strength(Both A and B)
How much potential difference can a material withstand before breaking down
Composition of the resistor
Moving vehicles

43. What is a wire classification?
Common - not rechargable - gradually discharges when in storage(All of the above)
Start with the band on the end and read to the center
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)
Bare - covered - insulated - stranded - cable(All of the above)

44. What do electrical charges need to cause a fire or explosion?
15 -000 ohms - 20%
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Bonding and grounding

45. What is a characteristic of a fixed resistor?
Resistance value can not be changed
Unlike poles attract
From the negative battery terminal to the positive terminal
Porcelain

46. What results when current is run through a material with high resistance?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Grounding wire
Volts
Heat and current control(both a and c)

47. What are the names of two of the six primary methods of producing a voltage?
Voltage
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Choke
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

48. 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
The rate of doing work
Parallel circuit
12 volts
Electrical resistance against the flow of current

49. What is needed for electric heating elements and the filaments of light bulbs?
Choke
Composition of the resistor
High resistance
Relationship between current and potential difference

50. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Unlike poles attract
Mutual induction
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Opposition to electrical current