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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 type of circuit has one path of follow through a load?
The direction of the magnetic field
Current flows in one direction - potential differences across a load does not change(Both A and B)
Series circuit
Electrical resistance against the flow of current

2. What information do the Left-Hand Rules provide?
Heat
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Heat
The rate of doing work

3. What is a common form used in conductors?
Does not move
Plastic - Rubber - Friction(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Cables

4. What are the two generic methods to eliminate static electricity from metal objects?
Current change in a coil creates a magnetic change
First digit is 9
Bonding and grounding
10

5. What determines the resistance of a resistor?
Composition of the resistor
Resistance value can not be changed
Tolerence
Strength of the charge

6. What is a conductor?
Grounding wire
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Composition of the resistor
Opposition to movement of free electrons

7. What types of protective tapes are used?
Cells can be connected together to make a battery
Plastic - Rubber - Friction(all of the above)
Moving vehicles
Insulation resistance

8. What results when current is run through a material with high resistance?
Opposition to electrical current
A magnetic field
15 -000 ohms - 20%
Heat and current control(both a and c)

9. What is a common cause of static electricity in a shop?
Moving vehicles
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Stores electrical charge
Heat

10. Where does the thumb point in both Left-Hand Rules?
1/1000th of an inch
Porcelain
The direction the negative charge moves
Potential difference

11. How do you read resistor color codes?
10
15 -000 ohms - 20%
Plastic - Rubber - Friction(all of the above)
Start with the band on the end and read to the center

12. What does resistance produce?
Strength of the charge
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Heat
High resistance

13. What is insulation resistance?
A magnetic field
Magnetic properties
Electrical resistance against the flow of current
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

14. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Bonding and grounding
Magnetic properties
--^V^V^V^---

15. What is a common measure of wire diameter?
Gauge number
20%
Symbol
Current flows in one direction - potential differences across a load does not change(Both A and B)

16. What is induction?
15 -000 ohms - 20%
Current change in a coil creates a magnetic change
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)

17. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Resistance value can not be changed
Heat
Voltage
Voltmeter

18. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Parallel
High resistance
Purging
From the negative battery terminal to the positive terminal

19. What is the unit of measurement of potential difference?
Common - not rechargable - gradually discharges when in storage(All of the above)
Insulation resistance
Volts
Cell

20. What is a DC circuit characteristic?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Wire splices
Current flows in one direction - potential differences across a load does not change(Both A and B)
The rate of doing work

21. What is a switch that operates by electricity?
Opposition to electrical current
Relay
Solenoid and Relay(both A and B)
A difference in potential energy

22. What is the purpose of a raceway?
A difference in potential energy
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Series circuit
How much potential difference can a material withstand before breaking down

23. How do static charges distribute themselves?
Fixed - Electrolytic - Variable(all of the above)
Circular and square mills(Both A and B)
Produce heat - light - or limit current to control it(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

24. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Chemical action
First digit
Plastic - Rubber - Friction(all of the above)

25. What is the unit of measurement of electrical current?
Purging
Amperes
American wire gauge(AWG)
Electromagnetic field

26. What is dielectric strength?
How much potential difference can a material withstand before breaking down
Insulation resistance and Dielectric strength(Both A and B)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Mutual induction

27. What does a transformer transform?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
The relationship of potential difference to current
Solenoid and Relay(both A and B)
Stores electrical charge

28. Identify the blueprint symbol for resistors.
Two
Magnetic properties
Potential difference
--^V^V^V^---

29. How is capacitance determined?
Porcelain
Moving vehicles
Insulation resistance
Area and spacing of capacitor - static current in the capacitor(both A and B)

30. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Circular and square mills(Both A and B)
DC current
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
20%

31. What is the unit of measurement of resistance?
Ohms
10
DC flows continuously in one direction and AC potential difference and current both change direction
Electromagnetism

32. A resistor is color coded brown - green - orange. What is its resistance?
--^V^V^V^---
High resistance
15 -000 ohms - 20%
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)

33. What is the name for electrical resistance of insulation?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Insulation resistance
Fixed - Electrolytic - Variable(all of the above)
American wire gauge(AWG)

34. What is the measure of potential difference?
Volts
75 Ohms
Electromagnetic field
50 Ohms

35. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
Volts
The relationship of potential difference to current
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

36. What wire measurement is commonly used in the U.S.?
American wire gauge(AWG)
Does not move
10
Fixed - Electrolytic - Variable(all of the above)

37. What is the purpose of resistors in electrical circuits?
Heat
50 Ohms
Produce heat - light - or limit current to control it(all of the above)
Symbol

38. What is the purpose of capacitors in electrical circuits?
American wire gauge(AWG)
Porcelain
Choke
Stores electrical charge

39. What is voltage?
Tolerence
A difference in potential energy
10%
Stranded

40. What is a characteristic of a fixed resistor?
Resistance increases as the conductor length increases
Cell
Resistance value can not be changed
1 watt

41. How is the heat production measured in a resistor?
Electrical resistance against the flow of current
Potential difference - E*I - current times current change from point to point(all of the above)
Grounding wire
Strength of the charge

42. What is resistance in electrical terms?
Parallel circuit
Opposition to electrical current
Electromagnetism
Amperes

43. What is a type of mechanical transducer?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Solenoid and Relay(both A and B)
Current change in a coil creates a magnetic change

44. When reading resistance color codes - what does the first band indicate?
Moving vehicles
Solenoid and Relay(both A and B)
Gauge number
First digit

45. What is a type of capacitor?
Battery
Fixed - Electrolytic - Variable(all of the above)
Porcelain
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

46. What is the use of the electromagnet?
Stores electrical charge
Symbol
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)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

47. The dry cell is what method for creating potential energy?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Chemical action
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

48. What is an electromagnet?
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
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Plastic - Rubber - Friction(all of the above)

49. What do we call the ability to do work?
Energy
Potential difference
Resistance value can not be changed
Volts

50. What is a wire classification?
Symbol
Alternating current
Serial
Bare - covered - insulated - stranded - cable(All of the above)