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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. Identify the blueprint symbol for resistors.
Relay
Amperes
--^V^V^V^---
Alternating current

2. What does static electricity do?
Chemical action
Ohms
Does not move
Mutual induction

3. The thermocouple uses which method for creating potential energy?
Heat
The relationship of potential difference to current
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Fixed - tapped - variable(all of the above)

4. What is a common measure of wire diameter?
Purging
Gauge number
Magnetic properties
The direction of the magnetic field

5. What do transducers do in electrical terms?
Circular and square mills(Both A and B)
DC current
Use an effect to produce another effect
Stores electrical charge

6. What does a moving charge produce?
Electromagnetic field
Volts
Energy
A magnetic field

7. Given R=E / I and the following information - plug in the data and solve the problem for resistance. 1.5 volt walkman battery - 0.02 amps of current
Energy
Tolerence
75 Ohms
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

8. How is the heat production measured in a resistor?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)
Chemical action
Parallel

9. What is needed for electric heating elements and the filaments of light bulbs?
Electromagnetism
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Stores electrical charge
High resistance

10. Which of the following is a type of resistor?
Energy
Purging
A magnetic field
Fixed - tapped - variable(all of the above)

11. Which type of cell can be recharged?
1 watt
Strength of the charge
Magnetic properties
Secondary cell

12. What is a way to classify wires and cables?
DC current
By their covering
Purging
Resistance increases as the conductor length increases

13. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
From the negative battery terminal to the positive terminal
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Amperes

14. What does Ohm's Law represent?
Relationship between current and potential difference
Insulation resistance and Dielectric strength(Both A and B)
First digit is 9
10

15. How many kinds of poles do magnets have?
Breakdown voltage
Relationship between current and potential difference
Porcelain
Two

16. What is a characteristic of insulators?
Resistance value can not be changed
Composition of the resistor
Ohms
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

17. What does a first band of white mean?
Tolerence
Heat
Use an effect to produce another effect
First digit is 9

18. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
Composition of the resistor
10%
Voltage

19. What is the name for electrical resistance of insulation?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Circular and square mills(Both A and B)
Insulation resistance
Opposition to electrical current

20. What is a switch that operates by electricity?
Fixed - Electrolytic - Variable(all of the above)
Relay
Energy
The relationship of potential difference to current

21. What is voltage?
Electrical resistance against the flow of current
Composition of the resistor
The relationship of potential difference to current
A difference in potential energy

22. What is the use of the electromagnet?
Fixed - tapped - variable(all of the above)
75 Ohms
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
The direction of the magnetic field

23. The dry cell is what method for creating potential energy?
--^V^V^V^---
Resistance value can not be changed
Plastic - Rubber - Friction(all of the above)
Chemical action

24. How do static charges distribute themselves?
Volts
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
12 volts
Current flows in one direction - potential differences across a load does not change(Both A and B)

25. What does a transformer transform?
The relationship of potential difference to current
DC flows continuously in one direction and AC potential difference and current both change direction
Choke
Heat

26. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
1/1000th of an inch
Bonding and grounding
Stranded

27. What is the difference between AC and DC?
Grounding wire
1 watt
DC flows continuously in one direction and AC potential difference and current both change direction
Relationship between current and potential difference

28. What is true about a dry cell?
Grounding wire
Common - not rechargable - gradually discharges when in storage(All of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

29. What is an arrangement of materials that create a potential difference by chemistry?
Alternating current
Electrical resistance against the flow of current
Cell
The direction the negative charge moves

30. What is resistance?
High resistance
Symbol
The direction of the magnetic field
Opposition to movement of free electrons

31. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Serial
Current change in a coil creates a magnetic change
Magnetic properties
Opposition to electrical current

32. Which of the following materials is NOT a good conductor?
Porcelain
Parallel circuit
Ohms
Insulation resistance

33. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Grounding wire
Series circuit
Amperes
Parallel

34. What is dielectric strength?
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)
How much potential difference can a material withstand before breaking down
Heat
Use an effect to produce another effect

35. Where do the fingers point in both Left-Hand Rules?
Voltmeter
Unlike poles attract
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
The direction of the magnetic field

36. What is insulation resistance?
12 volts
Electrical resistance against the flow of current
1/1000th of an inch
Volts

37. What is a characteristic of a fixed resistor?
Resistance value can not be changed
Volts
Potential difference
Chemical action

38. What can permanently break down a capacitor?
Breakdown voltage
The relationship of potential difference to current
20%
50 Ohms

39. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Use an effect to produce another effect
Purging
Cell

40. What is the term for doing work at the rate of joule per second?
Energy
Porcelain
Mutual induction
1 watt

41. What is a type of capacitor?
A magnetic field
5%
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Fixed - Electrolytic - Variable(all of the above)

42. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
The direction of the magnetic field
Electromagnetism
Heat

43. What is resistance in electrical terms?
Opposition to electrical current
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Does not move
First digit is 9

44. What is a common cause of static electricity in a shop?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
20%
Moving vehicles
Volts

45. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
High resistance
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Heat

46. Where does the thumb point in both Left-Hand Rules?
The direction the negative charge moves
Electrical resistance against the flow of current
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Volts

47. What makes electrons flow?
Relay
Mutual induction
Fixed - tapped - variable(all of the above)
Potential difference

48. What is the unit of measurement of resistance?
Fixed - tapped - variable(all of the above)
Electromagnetic field
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Ohms

49. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Heat
Parallel
5%

50. What is a rigid metal conduit?
Current change in a coil creates a magnetic change
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Parallel circuit
Insulation resistance and Dielectric strength(Both A and B)