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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 the term for two or more cells attached together?
Battery
Relay
Resistance value can not be changed
Amperes

2. How is the heat production measured in a resistor?
Potential difference - E*I - current times current change from point to point(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)
Resistance value can not be changed
The direction the negative charge moves

3. What is an electromagnet?
Composition of the resistor
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Volts
Parallel

4. What is a DC circuit characteristic?
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)
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)
Plastic - Rubber - Friction(all of the above)

5. To what measurement do the conductor mills refer?
A difference in potential energy
Insulation resistance and Dielectric strength(Both A and B)
1/1000th of an inch
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

6. What determines whether a spark can be produced?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Voltage
A magnetic field
Strength of the charge

7. What is the purpose of a raceway?
Wire splices
50 Ohms
Chemical action
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

8. What does a first band of white mean?
High resistance
First digit is 9
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Heat

9. 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
12 volts
Gauge number
Resistance value can not be changed
Heat

10. What are the common units of measurement for round and square conductor cross - sections?
Circular and square mills(Both A and B)
5%
10%
20%

11. When reading resistance color codes - what does the first band indicate?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Choke
First digit
5%

12. In most applications - what remains constant if the current remains constant and flows in one direction?
Battery
Bare - covered - insulated - stranded - cable(All of the above)
Does not move
Electromagnetic field

13. What do junction boxes protect?
5%
The direction of the magnetic field
Wire splices
Use an effect to produce another effect

14. What is a type of capacitor?
Start with the band on the end and read to the center
Fixed - Electrolytic - Variable(all of the above)
First digit is 9
Heat

15. Identify the general blueprint symbol for inductors.
How much potential difference can a material withstand before breaking down
From the negative battery terminal to the positive terminal
DC current
Symbol

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

17. What type of circuit has one path of follow through a load?
Cell
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Symbol
Series circuit

18. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
First digit
50 Ohms
Potential difference - E*I - current times current change from point to point(all of the above)

19. What is the difference between AC and DC?
Circular and square mills(Both A and B)
15 -000 ohms - 20%
Voltmeter
DC flows continuously in one direction and AC potential difference and current both change direction

20. What is a switch that operates by electricity?
The direction the negative charge moves
Silver
Relay
From the negative battery terminal to the positive terminal

21. How many kinds of poles do magnets have?
Two
Composition of the resistor
From the negative battery terminal to the positive terminal
Fixed - Electrolytic - Variable(all of the above)

22. What makes electrons flow?
By their covering
Potential difference
The relationship of potential difference to current
5%

23. What is the measure of potential difference?
Volts
Unlike poles attract
Energy
Battery

24. When does a DC circuit oppose current flow?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
First digit is 9
Resistance increases as the conductor length increases
Gauge number

25. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
5%
Use an effect to produce another effect
Volts
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)

26. What are the names of two of the six primary methods of producing a voltage?
Ability to store an electric charge
Heat
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Chemical action

27. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Chemical action
10
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)
Voltage

28. What do we call the ability to do work?
DC flows continuously in one direction and AC potential difference and current both change direction
Purging
Grounding wire
Energy

29. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Mutual induction
Circular and square mills(Both A and B)
Electromagnetic field

30. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
Energy
First digit is 9
Voltmeter

31. Where does the thumb point in both Left-Hand Rules?
Insulation resistance
--^V^V^V^---
50 Ohms
The direction the negative charge moves

32. What does a moving charge produce?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
From the negative battery terminal to the positive terminal
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)
A magnetic field

33. What is the term for doing work at the rate of joule per second?
American wire gauge(AWG)
Composition of the resistor
1 watt
Potential difference

34. What is the unit of measurement of potential difference?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Does not move
10
Volts

35. What do transducers do in electrical terms?
Purging
Use an effect to produce another effect
Potential difference - E*I - current times current change from point to point(all of the above)
Chemical action

36. What must be large enough to carry the largest current likely to occur?
A difference in potential energy
Series circuit
DC current
Grounding wire

37. What determines the resistance of a resistor?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Composition of the resistor
Resistance increases as the conductor length increases

38. What is the name for electrical resistance of insulation?
Insulation resistance
American wire gauge(AWG)
First digit is 9
Cell

39. When reading resistance color codes - what does the fourth band indicate?
Tolerence
Insulation resistance and Dielectric strength(Both A and B)
Magnetic properties
Secondary cell

40. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
The relationship of potential difference to current
20%
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)
First digit

41. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Cells can be connected together to make a battery
Alternating current
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Battery

42. Which type of cell can be recharged?
Stores electrical charge
Voltmeter
Secondary cell
Ability to store an electric charge

43. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Two
Heat
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

44. What are the two generic methods to eliminate static electricity from metal objects?
A difference in potential energy
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Bonding and grounding
Opposition to movement of free electrons

45. Identify the blueprint symbol for resistors.
--^V^V^V^---
Cables
Potential difference
Wire splices

46. What is a characteristic of a fixed resistor?
Cell
Resistance value can not be changed
DC current
Parallel

47. What types of protective tapes are used?
Ability to store an electric charge
1 watt
Opposes any change in the current flowing in a circuit
Plastic - Rubber - Friction(all of the above)

48. What does static electricity do?
Use an effect to produce another effect
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)
Does not move

49. What information do the Left-Hand Rules provide?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Volts
Current flows in one direction - potential differences across a load does not change(Both A and B)
American wire gauge(AWG)

50. What is induction?
Volts
Current change in a coil creates a magnetic change
Chemical action
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)