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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 general blueprint symbol for inductors.
Ability to store an electric charge
A magnetic field
Fixed - tapped - variable(all of the above)
Symbol

2. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
American wire gauge(AWG)
Moving vehicles
Produce heat - light - or limit current to control it(all of the above)

3. What is a rigid metal conduit?
Heat
Opposition to electrical current
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
A difference in potential energy

4. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Grounding wire
Moving vehicles
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

5. What does static electricity do?
Bare - covered - insulated - stranded - cable(All of the above)
Does not move
Electromagnetism
50 Ohms

6. What is resistance in electrical terms?
Opposition to electrical current
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Fixed - tapped - variable(all of the above)

7. What is a DC circuit characteristic?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Amperes
Fixed - tapped - variable(all of the above)
Opposition to electrical current

8. What is a common cause of static electricity in a shop?
DC current
--^V^V^V^---
Alternating current
Moving vehicles

9. What is the difference between AC and DC?
Moving vehicles
DC flows continuously in one direction and AC potential difference and current both change direction
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)
Heat and current control(both a and c)

10. The dry cell is what method for creating potential energy?
Chemical action
Breakdown voltage
Series circuit
Opposition to movement of free electrons

11. What cannot be transformed to higher or lower potential differences?
5%
DC current
Serial
Potential difference

12. Where does the thumb point in both Left-Hand Rules?
The direction the negative charge moves
Bare - covered - insulated - stranded - cable(All of the above)
Electromagnetism
A difference in potential energy

13. To what measurement do the conductor mills refer?
First digit is 9
Plastic - Rubber - Friction(all of the above)
1/1000th of an inch
Moving vehicles

14. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Parallel circuit
50 Ohms
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
5%

15. What type of circuit has one path of follow through a load?
Common - not rechargable - gradually discharges when in storage(All of the above)
By their covering
Composition of the resistor
Series circuit

16. What does Ohm's Law represent?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Relationship between current and potential difference
Stores electrical charge
Potential difference - E*I - current times current change from point to point(all of the above)

17. Identify the blueprint symbol for capacitors.
Symbol
The rate of doing work
--^V^V^V^---
Opposes any change in the current flowing in a circuit

18. Identify the blueprint symbol for resistors.
Resistance value can not be changed
Magnetic properties
DC flows continuously in one direction and AC potential difference and current both change direction
--^V^V^V^---

19. What does resistance produce?
Symbol
Heat
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Battery

20. What types of protective tapes are used?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
10
Cables
Plastic - Rubber - Friction(all of the above)

21. What can permanently break down a capacitor?
Fixed - tapped - variable(all of the above)
Breakdown voltage
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
The direction of the magnetic field

22. What is a switch that operates by electricity?
Voltage
Volts
Cables
Relay

23. When reading resistance color codes - what does the first band indicate?
Circular and square mills(Both A and B)
First digit
Tolerence
Purging

24. How many kinds of poles do magnets have?
Two
DC current
Opposition to electrical current
Gauge number

25. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
Fixed - Electrolytic - Variable(all of the above)
Insulation resistance and Dielectric strength(Both A and B)
Strength of the charge

26. 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)
Stores electrical charge
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Alternating current

27. What is induction?
Current change in a coil creates a magnetic change
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Potential difference
DC current

28. Which way is the current going in the circuit shown?(electron flow)
Purging
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Ohms
From the negative battery terminal to the positive terminal

29. The generator is what method of creating potential energy?
Stranded
Electromagnetism
Alternating current
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

30. What does a transformer transform?
10
The relationship of potential difference to current
Area and spacing of capacitor - static current in the capacitor(both A and B)
Cell

31. What determines the resistance of a resistor?
Common - not rechargable - gradually discharges when in storage(All of the above)
From the negative battery terminal to the positive terminal
Composition of the resistor
Breakdown voltage

32. When does a DC circuit oppose current flow?
10%
Current change in a coil creates a magnetic change
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

33. What is the purpose of resistors in electrical circuits?
High resistance
Opposition to electrical current
Produce heat - light - or limit current to control it(all of the above)
75 Ohms

34. What wire measurement is commonly used in the U.S.?
Serial
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Potential difference
American wire gauge(AWG)

35. What does a first band of white mean?
First digit is 9
Composition of the resistor
Bonding and grounding
Symbol

36. What does a moving charge produce?
Breakdown voltage
Electromagnetic field
How much potential difference can a material withstand before breaking down
A magnetic field

37. What is the term for two or more cells attached together?
Battery
Gauge number
Circular and square mills(Both A and B)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

38. What is the purpose of capacitors in electrical circuits?
Opposition to electrical current
The rate of doing work
The direction of the magnetic field
Stores electrical charge

39. A resistor is color coded brown - green - orange. What is its resistance?
1 watt
15 -000 ohms - 20%
Composition of the resistor
1/1000th of an inch

40. What is the unit of measurement of potential difference?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Volts
Plastic - Rubber - Friction(all of the above)

41. What is the type of cable composed of many fine wires?
Stranded
Cell
Volts
Heat and current control(both a and c)

42. Which material has the lowest resistance at ordinary temperatures?
Parallel circuit
Moving vehicles
Silver
Purging

43. What is a property of inductors in electrical circuits?
Grounding wire
Series circuit
Electromagnetic field
Opposes any change in the current flowing in a circuit

44. What is the name for electrical resistance of insulation?
1/1000th of an inch
Insulation resistance
Serial
50 Ohms

45. What must be large enough to carry the largest current likely to occur?
DC current
Bare - covered - insulated - stranded - cable(All of the above)
Grounding wire
Potential difference - E*I - current times current change from point to point(all of the above)

46. What are the two generic methods to eliminate static electricity from metal objects?
Stores electrical charge
Breakdown voltage
Bonding and grounding
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

47. What is voltage?
Relay
10%
A difference in potential energy
Grounding wire

48. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10%
Use an effect to produce another effect
12 volts
A difference in potential energy

49. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Produce heat - light - or limit current to control it(all of the above)
Plastic - Rubber - Friction(all of the above)
High resistance
Parallel

50. Which of the following materials is NOT a good conductor?
Porcelain
Area and spacing of capacitor - static current in the capacitor(both A and B)
Cells can be connected together to make a battery
Does not move