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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.
50 Ohms
10
Potential difference
Symbol

2. What does a first band of white mean?
First digit is 9
Series circuit
Symbol
Start with the band on the end and read to the center

3. What is the relationship of conductor size and length to resistance?
Opposition to movement of free electrons
Resistance increases as the conductor length increases
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
--^V^V^V^---

4. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Use an effect to produce another effect
Electrical resistance against the flow of current
Unlike poles attract

5. What does a transformer transform?
Cables
Electromagnetism
The relationship of potential difference to current
Chemical action

6. What is the purpose of capacitors in electrical circuits?
Symbol
Volts
Stores electrical charge
20%

7. What must be large enough to carry the largest current likely to occur?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Grounding wire
50 Ohms
Start with the band on the end and read to the center

8. How do static charges distribute themselves?
Electromagnetic field
Current flows in one direction - potential differences across a load does not change(Both A and B)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

9. To what measurement do the conductor mills refer?
Unlike poles attract
Symbol
Potential difference
1/1000th of an inch

10. What do we call the ability to do work?
The direction the negative charge moves
Porcelain
Electromagnetic field
Energy

11. Which of the following is a type of resistor?
The rate of doing work
Bonding and grounding
First digit
Fixed - tapped - variable(all of the above)

12. What is voltage?
A difference in potential energy
Opposition to movement of free electrons
Cells can be connected together to make a battery
Stores electrical charge

13. The thermocouple uses which method for creating potential energy?
Heat
Bonding and grounding
Symbol
Porcelain

14. What is the difference between AC and DC?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
The direction of the magnetic field
DC flows continuously in one direction and AC potential difference and current both change direction
Secondary cell

15. When reading resistance color codes - what does the fourth band indicate?
Solenoid and Relay(both A and B)
Tolerence
Resistance value can not be changed
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

16. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
1 watt
Unlike poles attract
Current change in a coil creates a magnetic change
Purging

17. What is the basic law of magnetic force?
Stores electrical charge
Electrical resistance against the flow of current
Stranded
Unlike poles attract

18. What type of circuit has two or more paths for current to follow?
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)
Parallel circuit
Plastic - Rubber - Friction(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)

19. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Grounding wire
A magnetic field
Serial
Unlike poles attract

20. What is resistance?
1/1000th of an inch
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Opposition to movement of free electrons
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

21. What is a characteristic of a fixed resistor?
Resistance value can not be changed
Alternating current
75 Ohms
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

22. What does an object have if a magnetic field acts on it?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
50 Ohms
How much potential difference can a material withstand before breaking down
Magnetic properties

23. What is the unit of measurement of electrical current?
50 Ohms
Bonding and grounding
Amperes
Secondary cell

24. What is the relationship between magnetism and electricity?
12 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)
Tolerence
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

25. What is the use of the electromagnet?
Moving vehicles
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Strength of the charge
The direction the negative charge moves

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)
Volts
Bonding and grounding
Stranded

27. What does a moving charge produce?
First digit is 9
Heat
Parallel
A magnetic field

28. What do transducers do in electrical terms?
Solenoid and Relay(both A and B)
Ohms
Resistance increases as the conductor length increases
Use an effect to produce another effect

29. What is a wire classification?
Fixed - tapped - variable(all of the above)
Silver
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)

30. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Composition of the resistor
Amperes
Alternating current
Serial

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

32. Identify the blueprint symbol for resistors.
--^V^V^V^---
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Produce heat - light - or limit current to control it(all of the above)
Gauge number

33. What is a conductor?
Opposition to electrical current
Insulation resistance and Dielectric strength(Both A and B)
Grounding wire
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

34. Where do the fingers point in both Left-Hand Rules?
Wire splices
The direction of the magnetic field
Voltage
First digit is 9

35. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Silver
Alternating current
Voltage
Voltmeter

36. What is the unit of measurement of resistance?
1 watt
Composition of the resistor
Ohms
Potential difference

37. What is the name for electrical resistance of insulation?
Volts
The relationship of potential difference to current
Insulation resistance
1/1000th of an inch

38. Which of the following materials is NOT a good conductor?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Moving vehicles
Voltmeter
Porcelain

39. What determines whether a spark can be produced?
Heat and current control(both a and c)
Voltmeter
20%
Strength of the charge

40. What is a common form used in conductors?
First digit is 9
Resistance value can not be changed
Cables
10%

41. What is the type of cable composed of many fine wires?
Alternating current
Circular and square mills(Both A and B)
10
Stranded

42. What determines the resistance of a resistor?
Stranded
75 Ohms
Amperes
Composition of the resistor

43. How many kinds of poles do magnets have?
American wire gauge(AWG)
By their covering
Two
The rate of doing work

44. What is the relationship between cells and batteries?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Breakdown voltage
Voltmeter
Cells can be connected together to make a battery

45. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
How much potential difference can a material withstand before breaking down
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
1/1000th of an inch

46. What is a characteristic of insulators?
Purging
Cables
Moving vehicles
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

47. Which way is the current going in the circuit shown?(electron flow)
Relationship between current and potential difference
Mutual induction
Grounding wire
From the negative battery terminal to the positive terminal

48. What can permanently break down a capacitor?
Moving vehicles
75 Ohms
Breakdown voltage
Magnetic properties

49. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Wire splices
Electromagnetism
Stranded
20%

50. What makes electrons flow?
Potential difference
Cells can be connected together to make a battery
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Relay