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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 property of inductors in electrical circuits?
A magnetic field
Parallel
Insulation resistance
Opposes any change in the current flowing in a circuit

2. Which of the following is a type of resistor?
From the negative battery terminal to the positive terminal
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Relay
Fixed - tapped - variable(all of the above)

3. What is the use of the electromagnet?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Series circuit
Bare - covered - insulated - stranded - cable(All of the above)
Electromagnetism

4. Identify the blueprint symbol for resistors.
Voltage
75 Ohms
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
--^V^V^V^---

5. What is an electromagnet?
Relay
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)
Grounding wire
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

6. Where does the thumb point in both Left-Hand Rules?
Breakdown voltage
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
The direction the negative charge moves
Electromagnetism

7. What is a way to classify wires and cables?
Circular and square mills(Both A and B)
By their covering
Unlike poles attract
Symbol

8. What is the relationship of conductor size and length to resistance?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Moving vehicles
Resistance increases as the conductor length increases

9. What is the difference between AC and DC?
Symbol
DC flows continuously in one direction and AC potential difference and current both change direction
Series circuit
Amperes

10. The thermocouple uses which method for creating potential energy?
15 -000 ohms - 20%
Circular and square mills(Both A and B)
Heat
Secondary cell

11. When does a DC circuit oppose current flow?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
American wire gauge(AWG)
Chemical action
Area and spacing of capacitor - static current in the capacitor(both A and B)

12. What does resistance produce?
Insulation resistance and Dielectric strength(Both A and B)
Heat
10
First digit is 9

13. What do junction boxes protect?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
High resistance
Wire splices
Fixed - tapped - variable(all of the above)

14. What does a moving charge produce?
1 watt
Amperes
A magnetic field
Two

15. What is the purpose of a raceway?
DC current
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Potential difference
Stranded

16. Identify the general blueprint symbol for inductors.
Symbol
Volts
A difference in potential energy
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)

17. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Opposition to electrical current
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)
Volts

18. What does static electricity do?
Resistance increases as the conductor length increases
Does not move
High resistance
Magnetic properties

19. What do we call the ability to do work?
Energy
12 volts
50 Ohms
The rate of doing work

20. Which way is the current going in the circuit shown?(electron flow)
Stranded
--^V^V^V^---
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
From the negative battery terminal to the positive terminal

21. What does a third band of brown mean?
10
20%
Symbol
Parallel

22. What instrument measures voltage?
A magnetic field
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Voltmeter
Insulation resistance

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

24. What does a transformer transform?
The relationship of potential difference to current
Electromagnetism
20%
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

25. What is the unit of measurement of potential difference?
Energy
Volts
Solenoid and Relay(both A and B)
Tolerence

26. What is a common cause of static electricity in a shop?
High resistance
Moving vehicles
Potential difference
Symbol

27. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Stranded
Grounding wire

28. What is the name for electrical resistance of insulation?
Stranded
Insulation resistance
Tolerence
Bonding and grounding

29. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
50 Ohms
Relationship between current and potential difference
Chemical action

30. When reading resistance color codes - what does the fourth band indicate?
Electrical resistance against the flow of current
Tolerence
1/1000th of an inch
75 Ohms

31. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Magnetic properties
5%

32. Which of the following materials is NOT a good conductor?
Porcelain
Cables
The direction the negative charge moves
High resistance

33. 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
1 watt
Choke
Magnetic properties
12 volts

34. What is a switch that operates by electricity?
Gauge number
Two
The direction of the magnetic field
Relay

35. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
5%
Opposes any change in the current flowing in a circuit
Cables

36. Identify the blueprint symbol for capacitors.
Fixed - tapped - variable(all of the above)
Insulation resistance and Dielectric strength(Both A and B)
Symbol
Electromagnetic field

37. What is the measure of potential difference?
Volts
Energy
Tolerence
Fixed - Electrolytic - Variable(all of the above)

38. What is the relationship between magnetism and electricity?
Moving vehicles
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)
A difference in potential energy
Unlike poles attract

39. What is the relationship between cells and batteries?
Insulation resistance and Dielectric strength(Both A and B)
Composition of the resistor
Cells can be connected together to make a battery
Area and spacing of capacitor - static current in the capacitor(both A and B)

40. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
DC current
Area and spacing of capacitor - static current in the capacitor(both A and B)
The direction of the magnetic field

41. What type of circuit has one path of follow through a load?
DC current
Insulation resistance and Dielectric strength(Both A and B)
A magnetic field
Series circuit

42. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Electromagnetism
10%
Series circuit
Bonding and grounding

43. How do static charges distribute themselves?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
20%
15 -000 ohms - 20%
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

44. How many kinds of poles do magnets have?
Silver
Two
Does not move
Cells can be connected together to make a battery

45. What type of circuit has two or more paths for current to follow?
Secondary cell
Parallel circuit
The relationship of potential difference to current
Circular and square mills(Both A and B)

46. In most applications - what remains constant if the current remains constant and flows in one direction?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Electromagnetic field
Opposition to electrical current
Bonding and grounding

47. What is a common measure of wire diameter?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Resistance increases as the conductor length increases
Gauge number
Current change in a coil creates a magnetic change

48. What is voltage?
Composition of the resistor
Symbol
Voltage
A difference in potential energy

49. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Secondary cell
Fixed - tapped - variable(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
20%

50. What is resistance?
Secondary cell
Opposition to movement of free electrons
Potential difference - E*I - current times current change from point to point(all of the above)
Solenoid and Relay(both A and B)