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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 does static electricity do?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Does not move
Choke
Unlike poles attract

2. What do electrical charges need to cause a fire or explosion?
Series circuit
Two
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Parallel circuit

3. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
The direction of the magnetic field
Current change in a coil creates a magnetic change
1 watt

4. What does a first band of white mean?
First digit is 9
The direction the negative charge moves
Unlike poles attract
Volts

5. What is a way to classify wires and cables?
Volts
By their covering
Opposition to electrical current
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

6. What do we call the ability to do work?
Bonding and grounding
From the negative battery terminal to the positive terminal
Energy
Stranded

7. How many kinds of poles do magnets have?
The direction the negative charge moves
Strength of the charge
15 -000 ohms - 20%
Two

8. Identify the blueprint symbol for capacitors.
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
20%
Symbol
How much potential difference can a material withstand before breaking down

9. What makes electrons flow?
Amperes
Potential difference
Alternating current
Battery

10. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
Composition of the resistor
Series circuit
Amperes

11. What is a type of capacitor?
Unlike poles attract
Energy
Does not move
Fixed - Electrolytic - Variable(all of the above)

12. What are the names of two of the six primary methods of producing a voltage?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Gauge number
American wire gauge(AWG)
Insulation resistance and Dielectric strength(Both A and B)

13. What determines the resistance of a resistor?
Composition of the resistor
Stranded
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)
Common - not rechargable - gradually discharges when in storage(All of the above)

14. What does Ohm's Law represent?
Voltage
From the negative battery terminal to the positive terminal
Relationship between current and potential difference
Energy

15. What is dielectric strength?
Silver
Resistance value can not be changed
Fixed - tapped - variable(all of the above)
How much potential difference can a material withstand before breaking down

16. What is the term for two or more cells attached together?
By their covering
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Battery
Magnetic properties

17. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Use an effect to produce another effect
10%
Moving vehicles
Electrical resistance against the flow of current

18. The dry cell is what method for creating potential energy?
Magnetic properties
Symbol
15 -000 ohms - 20%
Chemical action

19. What is the type of cable composed of many fine wires?
10%
Potential difference
Stranded
Choke

20. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Stranded
20%
Grounding wire
Use an effect to produce another effect

21. What does a moving charge produce?
Fixed - Electrolytic - Variable(all of the above)
10%
A magnetic field
Electromagnetism

22. Which of the following materials is NOT a good conductor?
Energy
High resistance
Porcelain
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

23. What does a transformer transform?
Chemical action
The relationship of potential difference to current
Circular and square mills(Both A and B)
Secondary cell

24. What is a wire classification?
Volts
The rate of doing work
Bare - covered - insulated - stranded - cable(All of the above)
Current change in a coil creates a magnetic change

25. What type of circuit has one path of follow through a load?
15 -000 ohms - 20%
Heat and current control(both a and c)
Use an effect to produce another effect
Series circuit

26. What does a third band of brown mean?
10
Wire splices
The rate of doing work
Silver

27. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
Relay
Does not move
10

28. What is the difference between AC and DC?
Stores electrical charge
The relationship of potential difference to current
Opposition to electrical current
DC flows continuously in one direction and AC potential difference and current both change direction

29. When reading resistance color codes - what does the fourth band indicate?
Tolerence
Grounding wire
Symbol
Voltage

30. What is power?
The rate of doing work
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
The direction the negative charge moves
Mutual induction

31. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
Ability to store an electric charge
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)
Relay

32. What is the measure of potential difference?
Volts
Area and spacing of capacitor - static current in the capacitor(both A and B)
15 -000 ohms - 20%
First digit

33. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
5%
Insulation resistance and Dielectric strength(Both A and B)
10%
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

34. What is resistance in electrical terms?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Ability to store an electric charge
Opposition to electrical current
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

35. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Porcelain
The direction of the magnetic field
Parallel

36. What is the term for doing work at the rate of joule per second?
1 watt
50 Ohms
15 -000 ohms - 20%
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

37. How is capacitance determined?
Voltage
Area and spacing of capacitor - static current in the capacitor(both A and B)
Bare - covered - insulated - stranded - cable(All of the above)
Cables

38. What is the relationship between magnetism and electricity?
Battery
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
Fixed - Electrolytic - Variable(all of the above)

39. 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
American wire gauge(AWG)
Plastic - Rubber - Friction(all of the above)
Secondary cell
12 volts

40. What wire measurement is commonly used in the U.S.?
Energy
Bonding and grounding
American wire gauge(AWG)
Bare - covered - insulated - stranded - cable(All of the above)

41. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Serial
Voltage
Strength of the charge
Voltmeter

42. What is a DC circuit characteristic?
The direction the negative charge moves
Current flows in one direction - potential differences across a load does not change(Both A and B)
1 watt
Two

43. What is the unit of measurement of resistance?
The rate of doing work
Potential difference
12 volts
Ohms

44. Identify the blueprint symbol for resistors.
Heat
--^V^V^V^---
Use an effect to produce another effect
Insulation resistance

45. When reading resistance color codes - what does the first band indicate?
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)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
First digit
Opposes any change in the current flowing in a circuit

46. What is the unit of measurement of potential difference?
Volts
Opposes any change in the current flowing in a circuit
Cell
Heat

47. In most applications - what remains constant if the current remains constant and flows in one direction?
1 watt
Electromagnetic field
Solenoid and Relay(both A and B)
1/1000th of an inch

48. The generator is what method of creating potential energy?
Electromagnetic field
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Electromagnetism

49. What do junction boxes protect?
Wire splices
Does not move
Current flows in one direction - potential differences across a load does not change(Both A and B)
Bare - covered - insulated - stranded - cable(All of the above)

50. What is needed for electric heating elements and the filaments of light bulbs?
High resistance
Electromagnetic field
First digit is 9
Current change in a coil creates a magnetic change