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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. How many kinds of poles do magnets have?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Two
Moving vehicles
Purging

2. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
1/1000th of an inch
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
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)

3. How do you read resistor color codes?
Purging
10%
The rate of doing work
Start with the band on the end and read to the center

4. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Resistance value can not be changed
Energy
50 Ohms
Unlike poles attract

5. What does an object have if a magnetic field acts on it?
Magnetic properties
The relationship of potential difference to current
A difference in potential energy
Breakdown voltage

6. Which type of cell can be recharged?
Bonding and grounding
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)
Secondary cell
5%

7. A resistor is color coded brown - green - orange. What is its resistance?
Opposition to movement of free electrons
Stores electrical charge
Volts
15 -000 ohms - 20%

8. What is a type of mechanical transducer?
Bare - covered - insulated - stranded - cable(All of the above)
A difference in potential energy
Solenoid and Relay(both A and B)
1/1000th of an inch

9. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Serial
Parallel
Start with the band on the end and read to the center

10. What type of circuit has one path of follow through a load?
Plastic - Rubber - Friction(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Series circuit
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

11. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
Grounding wire
Use an effect to produce another effect
Solenoid and Relay(both A and B)

12. What instrument measures voltage?
Ohms
12 volts
Symbol
Voltmeter

13. The dry cell is what method for creating potential energy?
Cells can be connected together to make a battery
Chemical action
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Stores electrical charge

14. What makes electrons flow?
Heat
Potential difference
The rate of doing work
Series circuit

15. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Secondary cell
50 Ohms
Electrical resistance against the flow of current
Alternating current

16. What is a property of inductors in electrical circuits?
Opposes any change in the current flowing in a circuit
12 volts
Silver
Strength of the charge

17. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Cells can be connected together to make a battery
Electromagnetism
Potential difference

18. What is a characteristic of a fixed resistor?
Resistance value can not be changed
Ohms
Moving vehicles
Purging

19. Identify the blueprint symbol for capacitors.
Symbol
Does not move
Bare - covered - insulated - stranded - cable(All of the above)
Unlike poles attract

20. Identify the blueprint symbol for resistors.
--^V^V^V^---
Relay
Composition of the resistor
Serial

21. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Secondary cell
DC flows continuously in one direction and AC potential difference and current both change direction
Serial
10%

22. What is capacitance in electrical terms?
Ability to store an electric charge
Heat
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Amperes

23. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Gauge number
Ability to store an electric charge
Symbol
Mutual induction

24. Why is the transformer important to AC electricity?

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25. What types of protective tapes are used?
Relationship between current and potential difference
Resistance value can not be changed
Alternating current
Plastic - Rubber - Friction(all of the above)

26. When reading resistance color codes - what does the fourth band indicate?
Cables
Tolerence
Mutual induction
Stranded

27. What do transducers do in electrical terms?
Chemical action
Use an effect to produce another effect
Voltmeter
Tolerence

28. What does a transformer transform?
How much potential difference can a material withstand before breaking down
Stranded
12 volts
The relationship of potential difference to current

29. What is the purpose of resistors in electrical circuits?
Current change in a coil creates a magnetic change
12 volts
Gauge number
Produce heat - light - or limit current to control it(all of the above)

30. What is the use of the electromagnet?
High resistance
The direction of the magnetic field
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Alternating current

31. What is a rigid metal conduit?
Strength of the charge
Insulation resistance and Dielectric strength(Both A and B)
Ohms
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

32. What is another name for an inductor?
Heat
Choke
Area and spacing of capacitor - static current in the capacitor(both A and B)
Volts

33. What must be large enough to carry the largest current likely to occur?
Start with the band on the end and read to the center
--^V^V^V^---
Grounding wire
Current flows in one direction - potential differences across a load does not change(Both A and B)

34. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
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)
Amperes
20%

35. What is voltage?
By their covering
Relay
A difference in potential energy
Potential difference

36. Which of the following is a type of resistor?
Fixed - tapped - variable(all of the above)
Stranded
Symbol
Opposes any change in the current flowing in a circuit

37. 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
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Chemical action
12 volts
Fixed - tapped - variable(all of the above)

38. What cannot be transformed to higher or lower potential differences?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Opposition to electrical current
DC current
The rate of doing work

39. What are the two generic methods to eliminate static electricity from metal objects?
Bonding and grounding
Choke
10
The direction the negative charge moves

40. What determines the resistance of a resistor?
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
Composition of the resistor
The direction of the magnetic field

41. What does static electricity do?
First digit
Ability to store an electric charge
Magnetic properties
Does not move

42. What is the measure of potential difference?
Volts
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Silver
Serial

43. What is the difference between AC and DC?
DC flows continuously in one direction and AC potential difference and current both change direction
Amperes
DC current
Electrical resistance against the flow of current

44. What is a way to classify wires and cables?
Current change in a coil creates a magnetic change
Chemical action
Produce heat - light - or limit current to control it(all of the above)
By their covering

45. Where does the thumb point in both Left-Hand Rules?
Parallel circuit
20%
The direction the negative charge moves
DC flows continuously in one direction and AC potential difference and current both change direction

46. Which of the following materials is NOT a good conductor?
The direction the negative charge moves
Moving vehicles
1 watt
Porcelain

47. What is the unit of measurement of electrical current?
American wire gauge(AWG)
Tolerence
Strength of the charge
Amperes

48. What type of circuit has two or more paths for current to follow?
Current change in a coil creates a magnetic change
Parallel circuit
Moving vehicles
Insulation resistance

49. What is the term for two or more cells attached together?
Resistance value can not be changed
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Battery
Secondary cell

50. What does Ohm's Law represent?
Relationship between current and potential difference
Tolerence
Insulation resistance and Dielectric strength(Both A and B)
1/1000th of an inch