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

2. What is a wire classification?
Potential difference
Bare - covered - insulated - stranded - cable(All of the above)
Does not move
1 watt

3. How do you read resistor color codes?
A magnetic field
Does not move
Start with the band on the end and read to the center
Bonding and grounding

4. What is insulation resistance?
Two
1 watt
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Electrical resistance against the flow of current

5. What does a third band of brown mean?
A difference in potential energy
Common - not rechargable - gradually discharges when in storage(All of the above)
Voltage
10

6. What does static electricity do?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Does not move
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)
How much potential difference can a material withstand before breaking down

7. Identify the blueprint symbol for resistors.
--^V^V^V^---
Electromagnetic field
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

8. What is the relationship between magnetism and electricity?
Parallel circuit
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)
High resistance

9. What is the purpose of capacitors in electrical circuits?
Series circuit
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
A difference in potential energy
Stores electrical charge

10. What is the basic law of magnetic force?
Symbol
Unlike poles attract
Relay
Battery

11. What is a common cause of static electricity in a shop?
Moving vehicles
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
15 -000 ohms - 20%
Voltage

12. What makes electrons flow?
Alternating current
Ohms
Potential difference
Common - not rechargable - gradually discharges when in storage(All of the above)

13. What instrument measures voltage?
Energy
Opposition to electrical current
Grounding wire
Voltmeter

14. What is the measure of potential difference?
Stranded
Common - not rechargable - gradually discharges when in storage(All of the above)
Volts
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

15. How is the heat production measured in a resistor?
Potential difference - E*I - current times current change from point to point(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
DC current
5%

16. In most applications - what remains constant if the current remains constant and flows in one direction?
Insulation resistance
Electromagnetic field
Insulation resistance and Dielectric strength(Both A and B)
Common - not rechargable - gradually discharges when in storage(All of the above)

17. What is the unit of measurement of electrical current?
DC flows continuously in one direction and AC potential difference and current both change direction
Electromagnetism
Heat
Amperes

18. What is a switch that operates by electricity?
Solenoid and Relay(both A and B)
12 volts
Current flows in one direction - potential differences across a load does not change(Both A and B)
Relay

19. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Purging
Relay
Alternating current
Insulation resistance

20. What is the use of the electromagnet?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
From the negative battery terminal to the positive terminal
Magnetic properties
Voltage

21. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Electromagnetism
Serial
How much potential difference can a material withstand before breaking down
50 Ohms

22. What information do the Left-Hand Rules provide?
Ability to store an electric charge
Chemical action
How much potential difference can a material withstand before breaking down
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

23. What is a characteristic of a fixed resistor?
Circular and square mills(Both A and B)
Resistance value can not be changed
Magnetic properties
Resistance increases as the conductor length increases

24. What is the purpose of resistors in electrical circuits?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Produce heat - light - or limit current to control it(all of the above)
Heat
12 volts

25. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
First digit
Mutual induction
DC flows continuously in one direction and AC potential difference and current both change direction
Bare - covered - insulated - stranded - cable(All of the above)

26. What is a common measure of wire diameter?
Gauge number
Tolerence
--^V^V^V^---
Alternating current

27. What makes electrons flow?
Potential difference
--^V^V^V^---
Parallel
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

28. When reading resistance color codes - what does the first band indicate?
Tolerence
First digit
By their covering
Parallel circuit

29. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
Serial
Volts
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

30. Identify the blueprint symbol for capacitors.
How much potential difference can a material withstand before breaking down
Symbol
First digit is 9
5%

31. What is an electromagnet?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Bonding and grounding
--^V^V^V^---
Volts

32. Identify the general blueprint symbol for inductors.
Relay
Heat
Symbol
Grounding wire

33. What is dielectric strength?
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)
How much potential difference can a material withstand before breaking down
75 Ohms
15 -000 ohms - 20%

34. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Alternating current
Gauge number
DC current
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

35. Which of the following materials is NOT a good conductor?
Resistance increases as the conductor length increases
Porcelain
Tolerence
The rate of doing work

36. Which material has the lowest resistance at ordinary temperatures?
1 watt
Cables
Serial
Silver

37. What does a transformer transform?
The relationship of potential difference to current
Composition of the resistor
Current flows in one direction - potential differences across a load does not change(Both A and B)
Secondary cell

38. What must be large enough to carry the largest current likely to occur?
Two
Purging
1/1000th of an inch
Grounding wire

39. What is the type of cable composed of many fine wires?
Potential difference
Fixed - Electrolytic - Variable(all of the above)
Cells can be connected together to make a battery
Stranded

40. What is power?
Silver
20%
15 -000 ohms - 20%
The rate of doing work

41. What is a property of inductors in electrical circuits?
Opposes any change in the current flowing in a circuit
The direction the negative charge moves
Amperes
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

42. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Relationship between current and potential difference
--^V^V^V^---
Parallel
Opposes any change in the current flowing in a circuit

43. What types of protective tapes are used?
Circular and square mills(Both A and B)
--^V^V^V^---
Plastic - Rubber - Friction(all of the above)
First digit

44. What is the term for doing work at the rate of joule per second?
Symbol
1 watt
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
DC flows continuously in one direction and AC potential difference and current both change direction

45. What is a way to classify wires and cables?
Voltmeter
Insulation resistance and Dielectric strength(Both A and B)
Grounding wire
By their covering

46. What is an arrangement of materials that create a potential difference by chemistry?
1/1000th of an inch
Chemical action
Battery
Cell

47. What determines the resistance of a resistor?
Resistance increases as the conductor length increases
Heat and current control(both a and c)
Composition of the resistor
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

48. What are the two generic methods to eliminate static electricity from metal objects?
Bare - covered - insulated - stranded - cable(All of the above)
Alternating current
10%
Bonding and grounding

49. What is the name for electrical resistance of insulation?
Plastic - Rubber - Friction(all of the above)
10
High resistance
Insulation resistance

50. What is the unit of measurement of resistance?
Serial
Ohms
How much potential difference can a material withstand before breaking down
A difference in potential energy