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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 switch that operates by electricity?
Relay
Circular and square mills(Both A and B)
Electromagnetism
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

2. What is the difference between AC and DC?
DC current
DC flows continuously in one direction and AC potential difference and current both change direction
Bare - covered - insulated - stranded - cable(All of the above)
Chemical action

3. To what measurement do the conductor mills refer?
Composition of the resistor
Cell
Heat
1/1000th of an inch

4. What does a transformer transform?
The relationship of potential difference to current
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
First digit is 9
The direction of the magnetic field

5. When reading resistance color codes - what does the first band indicate?
5%
Resistance increases as the conductor length increases
American wire gauge(AWG)
First digit

6. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Start with the band on the end and read to the center
1 watt
Electromagnetism
Serial

7. What is dielectric strength?
How much potential difference can a material withstand before breaking down
Tolerence
Relay
Insulation resistance

8. Identify the general blueprint symbol for inductors.
Electromagnetism
Symbol
Solenoid and Relay(both A and B)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

9. What is the term for two or more cells attached together?
Resistance increases as the conductor length increases
Battery
Unlike poles attract
Fixed - Electrolytic - Variable(all of the above)

10. What is a wire classification?
Wire splices
Circular and square mills(Both A and B)
Bare - covered - insulated - stranded - cable(All of the above)
First digit

11. What type of circuit has two or more paths for current to follow?
By their covering
Composition of the resistor
Parallel circuit
Produce heat - light - or limit current to control it(all of the above)

12. What does resistance produce?
Cables
Current flows in one direction - potential differences across a load does not change(Both A and B)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Heat

13. What is resistance in electrical terms?
From the negative battery terminal to the positive terminal
Opposition to electrical current
Fixed - Electrolytic - Variable(all of the above)
15 -000 ohms - 20%

14. What is the type of cable composed of many fine wires?
Stranded
15 -000 ohms - 20%
Insulation resistance and Dielectric strength(Both A and B)
Use an effect to produce another effect

15. What is voltage?
A difference in potential energy
High resistance
Area and spacing of capacitor - static current in the capacitor(both A and B)
Opposition to movement of free electrons

16. What type of circuit has one path of follow through a load?
First digit
Common - not rechargable - gradually discharges when in storage(All of the above)
10
Series circuit

17. How do static charges distribute themselves?
15 -000 ohms - 20%
Potential difference
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Electromagnetism

18. What is the term for doing work at the rate of joule per second?
Voltage
1 watt
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)
Breakdown voltage

19. What is a rigid metal conduit?
Opposes any change in the current flowing in a circuit
Resistance value can not be changed
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Current change in a coil creates a magnetic change

20. What makes electrons flow?
Battery
Potential difference
Electromagnetism
Bare - covered - insulated - stranded - cable(All of the above)

21. Identify the blueprint symbol for resistors.
--^V^V^V^---
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
50 Ohms
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

22. What is the relationship between cells and batteries?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Opposes any change in the current flowing in a circuit
Voltmeter
Cells can be connected together to make a battery

23. What is the purpose of resistors in electrical circuits?
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)
10%
Symbol
Produce heat - light - or limit current to control it(all of the above)

24. Where do the fingers point in both Left-Hand Rules?
Use an effect to produce another effect
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
The direction of the magnetic field
Volts

25. What wire measurement is commonly used in the U.S.?
Start with the band on the end and read to the center
Does not move
Insulation resistance
American wire gauge(AWG)

26. Which way is the current going in the circuit shown?(electron flow)
Battery
Tolerence
From the negative battery terminal to the positive terminal
Heat

27. Which of the following is a type of resistor?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Fixed - tapped - variable(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
DC current

28. The thermocouple uses which method for creating potential energy?
The direction the negative charge moves
Symbol
Heat
75 Ohms

29. When does a DC circuit oppose current flow?
Resistance value can not be changed
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Start with the band on the end and read to the center

30. What instrument measures voltage?
Voltage
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
5%
Voltmeter

31. What do transducers do in electrical terms?
Use an effect to produce another effect
Composition of the resistor
Start with the band on the end and read to the center
Opposition to electrical current

32. What is the unit of measurement of resistance?
Ohms
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Parallel
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)

33. What is power?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Stranded
Bare - covered - insulated - stranded - cable(All of the above)
The rate of doing work

34. What is an arrangement of materials that create a potential difference by chemistry?
Current change in a coil creates a magnetic change
Cell
High resistance
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

35. What is the relationship between magnetism and electricity?
DC flows continuously in one direction and AC potential difference and current both change direction
Grounding wire
1/1000th of an inch
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)

36. What is insulation resistance?
Electrical resistance against the flow of current
Porcelain
The relationship of potential difference to current
Choke

37. What is a conductor?
Plastic - Rubber - Friction(all of the above)
1/1000th of an inch
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
The direction of the magnetic field

38. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
The relationship of potential difference to current
Parallel circuit
Voltage

39. What is a common form used in conductors?
Resistance value can not be changed
Voltage
Parallel circuit
Cables

40. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10%
Opposes any change in the current flowing in a circuit
Ohms
Insulation resistance

41. Which type of cell can be recharged?
Silver
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Potential difference
Secondary cell

42. Which of the following materials is NOT a good conductor?
Heat
Symbol
Porcelain
--^V^V^V^---

43. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Mutual induction
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)
Parallel

44. What is induction?
75 Ohms
Cables
Resistance increases as the conductor length increases
Current change in a coil creates a magnetic change

45. Where does the thumb point in both Left-Hand Rules?
Magnetic properties
Ability to store an electric charge
The direction the negative charge moves
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

46. What must be large enough to carry the largest current likely to occur?
Circular and square mills(Both A and B)
Battery
Grounding wire
Gauge number

47. What is the purpose of a raceway?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
The direction of the magnetic field
10%

48. What does an object have if a magnetic field acts on it?
Cables
Magnetic properties
Use an effect to produce another effect
Alternating current

49. What is a DC circuit characteristic?
Start with the band on the end and read to the center
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)
Potential difference
Current flows in one direction - potential differences across a load does not change(Both A and B)

50. What is needed for electric heating elements and the filaments of light bulbs?
High resistance
12 volts
Silver
Insulation resistance