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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. Which of the following materials is NOT a good conductor?
Potential difference
Mutual induction
Porcelain
Stores electrical charge

2. Where do the fingers point in both Left-Hand Rules?
Electrical resistance against the flow of current
The direction of the magnetic field
Wire splices
Moving vehicles

3. What is insulation resistance?
Potential difference
Fixed - tapped - variable(all of the above)
Electrical resistance against the flow of current
Tolerence

4. What does a transformer transform?
Electrical resistance against the flow of current
The relationship of potential difference to current
Cell
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)

5. What is the relationship between magnetism and electricity?
Two
Cells can be connected together to make a battery
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)
Symbol

6. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
By their covering
Circular and square mills(Both A and B)
Solenoid and Relay(both A and B)

7. What is the unit of measurement of resistance?
DC flows continuously in one direction and AC potential difference and current both change direction
Opposes any change in the current flowing in a circuit
Ohms
The direction of the magnetic field

8. What does an object have if a magnetic field acts on it?
Symbol
Magnetic properties
Heat and current control(both a and c)
Energy

9. What determines whether a spark can be produced?
1/1000th of an inch
Strength of the charge
Use an effect to produce another effect
Two

10. What is a rigid metal conduit?
Tolerence
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Ohms

11. The thermocouple uses which method for creating potential energy?
Relay
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Heat
Stranded

12. What is a type of mechanical transducer?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Purging
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Solenoid and Relay(both A and B)

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

14. What is the measure of potential difference?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Volts
20%
Opposition to movement of free electrons

15. Identify the blueprint symbol for capacitors.
12 volts
The direction of the magnetic field
Fixed - tapped - variable(all of the above)
Symbol

16. What is an electromagnet?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Serial
Plastic - Rubber - Friction(all of the above)
The direction of the magnetic field

17. What is a wire classification?
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)
Electromagnetism
Bare - covered - insulated - stranded - cable(All of the above)

18. Identify the general blueprint symbol for inductors.
Symbol
Insulation resistance and Dielectric strength(Both A and B)
Silver
--^V^V^V^---

19. What makes electrons flow?
Potential difference
Current flows in one direction - potential differences across a load does not change(Both A and B)
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)

20. What is the name for electrical resistance of insulation?
Voltage
Insulation resistance
The relationship of potential difference to current
The rate of doing work

21. How is the heat production measured in a resistor?
Mutual induction
DC flows continuously in one direction and AC potential difference and current both change direction
Potential difference - E*I - current times current change from point to point(all of the above)
20%

22. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
Voltage
12 volts
Resistance value can not be changed

23. What is dielectric strength?
Heat
Mutual induction
Insulation resistance
How much potential difference can a material withstand before breaking down

24. What instrument measures voltage?
Voltmeter
Relay
Fixed - Electrolytic - Variable(all of the above)
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)

25. What type of circuit has two or more paths for current to follow?
Electromagnetic field
Parallel circuit
American wire gauge(AWG)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

26. What type of circuit has one path of follow through a load?
5%
Heat and current control(both a and c)
Start with the band on the end and read to the center
Series circuit

27. How do static charges distribute themselves?
Gauge number
Opposition to movement of free electrons
Chemical action
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

28. What is induction?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Potential difference - E*I - current times current change from point to point(all of the above)
Start with the band on the end and read to the center
Current change in a coil creates a magnetic change

29. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Breakdown voltage
Parallel
Purging
10%

30. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
20%
Ohms
Electrical resistance against the flow of current
Serial

31. In most applications - what remains constant if the current remains constant and flows in one direction?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Electromagnetic field
Strength of the charge
Parallel

32. When reading resistance color codes - what does the fourth band indicate?
Tolerence
The relationship of potential difference to 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)
Heat

33. What does a first band of white mean?
Chemical action
Potential difference - E*I - current times current change from point to point(all of the above)
Series circuit
First digit is 9

34. What is the unit of measurement of electrical current?
The rate of doing work
Amperes
Electromagnetism
Wire splices

35. What is a conductor?
Unlike poles attract
75 Ohms
1 watt
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

36. What makes electrons flow?
Porcelain
Common - not rechargable - gradually discharges when in storage(All of the above)
Potential difference
DC flows continuously in one direction and AC potential difference and current both change direction

37. What is capacitance in electrical terms?
Serial
Does not move
Ability to store an electric charge
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

38. What results when current is run through a material with high resistance?
10%
The direction of the magnetic field
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Heat and current control(both a and c)

39. What is the purpose of a raceway?
Bonding and grounding
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Alternating current
Chemical action

40. A resistor is color coded brown - green - orange. What is its resistance?
15 -000 ohms - 20%
Insulation resistance and Dielectric strength(Both A and B)
Potential difference
Battery

41. What is power?
The rate of doing work
Resistance value can not be changed
Purging
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

42. What types of protective tapes are used?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Potential difference
Plastic - Rubber - Friction(all of the above)
5%

43. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Opposes any change in the current flowing in a circuit
Parallel
Electromagnetism
1 watt

44. What is a way to classify wires and cables?
Battery
DC current
By their covering
The direction of the magnetic field

45. What does static electricity do?
Symbol
Does not move
A difference in potential energy
Resistance increases as the conductor length increases

46. What can permanently break down a capacitor?
Voltage
Breakdown voltage
50 Ohms
A magnetic field

47. What is the relationship between cells and batteries?
Purging
Bonding and grounding
Cells can be connected together to make a battery
Series circuit

48. What is an arrangement of materials that create a potential difference by chemistry?
Choke
Cell
Insulation resistance
Energy

49. What is a property of inductors in electrical circuits?
Porcelain
Opposes any change in the current flowing in a circuit
Plastic - Rubber - Friction(all of the above)
Electromagnetic field

50. When reading resistance color codes - what does the first band indicate?
Volts
Two
10%
First digit