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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 types of protective tapes are used?
Wire splices
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)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Plastic - Rubber - Friction(all of the above)

2. What must be large enough to carry the largest current likely to occur?
Grounding wire
10%
Insulation resistance
Purging

3. What is power?
The rate of doing work
Electromagnetism
First digit is 9
Bare - covered - insulated - stranded - cable(All of the above)

4. The thermocouple uses which method for creating potential energy?
Gauge number
15 -000 ohms - 20%
10%
Heat

5. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Heat
A difference in potential energy
5%
20%

6. What type of circuit has two or more paths for current to follow?
Resistance value can not be changed
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Parallel circuit
Use an effect to produce another effect

7. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
The direction of the magnetic field
Tolerence
Purging
High resistance

8. Which of the following materials is NOT a good conductor?
Series circuit
Area and spacing of capacitor - static current in the capacitor(both A and B)
Porcelain
Secondary cell

9. 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
Wire splices
12 volts
Energy
Moving vehicles

10. What is the fundamental property of insulators?
By their covering
Insulation resistance and Dielectric strength(Both A and B)
10%
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)

11. What does an object have if a magnetic field acts on it?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
75 Ohms
Magnetic properties
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)

12. What is an electromagnet?
The direction the negative charge moves
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Magnetic properties
Two

13. What does resistance produce?
50 Ohms
Heat
Electromagnetism
Area and spacing of capacitor - static current in the capacitor(both A and B)

14. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Relay
Symbol
Two
50 Ohms

15. What is capacitance in electrical terms?
Moving vehicles
--^V^V^V^---
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Ability to store an electric charge

16. What does static electricity do?
High resistance
Does not move
Wire splices
Parallel circuit

17. Where do the fingers point in both Left-Hand Rules?
Start with the band on the end and read to the center
The direction of the magnetic field
Produce heat - light - or limit current to control it(all of the above)
Heat

18. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
The direction the negative charge moves
Voltage
Plastic - Rubber - Friction(all of the above)
First digit is 9

19. What is voltage?
Symbol
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Porcelain
A difference in potential energy

20. Which material has the lowest resistance at ordinary temperatures?
Energy
Start with the band on the end and read to the center
Potential difference
Silver

21. How do you read resistor color codes?
Electrical resistance against the flow of current
10%
Start with the band on the end and read to the center
Mutual induction

22. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Stores electrical charge
Circular and square mills(Both A and B)
Common - not rechargable - gradually discharges when in storage(All of the above)
Parallel

23. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
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)

24. What does Ohm's Law represent?
Energy
DC flows continuously in one direction and AC potential difference and current both change direction
Plastic - Rubber - Friction(all of the above)
Relationship between current and potential difference

25. When reading resistance color codes - what does the fourth band indicate?
Amperes
Breakdown voltage
Tolerence
Cables

26. What is the unit of measurement of potential difference?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Volts
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
First digit

27. How many kinds of poles do magnets have?
Breakdown voltage
Two
Plastic - Rubber - Friction(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

28. What is a way to classify wires and cables?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Silver
By their covering
Stranded

29. What is the difference between AC and DC?
DC flows continuously in one direction and AC potential difference and current both change direction
Electromagnetic field
Resistance increases as the conductor length increases
Cables

30. How is the heat production measured in a resistor?
Breakdown voltage
Potential difference - E*I - current times current change from point to point(all of the above)
Mutual induction
12 volts

31. What is needed for electric heating elements and the filaments of light bulbs?
High resistance
Breakdown voltage
First digit
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

32. In most applications - what remains constant if the current remains constant and flows in one direction?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Electromagnetic field
Cell
Produce heat - light - or limit current to control it(all of the above)

33. What can permanently break down a capacitor?
Stores electrical charge
Breakdown voltage
Choke
Parallel circuit

34. Identify the blueprint symbol for resistors.
Parallel circuit
--^V^V^V^---
Ability to store an electric charge
Battery

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

36. What is a switch that operates by electricity?
Voltage
Relay
Grounding wire
Stranded

37. What is a common cause of static electricity in a shop?
Porcelain
Moving vehicles
Resistance increases as the conductor length increases
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

38. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
Heat
Silver
A magnetic field

39. What is the purpose of a raceway?
Breakdown voltage
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Does not move
Area and spacing of capacitor - static current in the capacitor(both A and B)

40. What is an arrangement of materials that create a potential difference by chemistry?
Cell
Composition of the resistor
75 Ohms
A magnetic field

41. A resistor is color coded brown - green - orange. What is its resistance?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
15 -000 ohms - 20%
Solenoid and Relay(both A and B)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

42. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
20%
Ability to store an electric charge
Bonding and grounding
Serial

43. What is the use of the electromagnet?
Potential difference
Ohms
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
First digit is 9

44. What is a DC circuit characteristic?
Start with the band on the end and read to the center
Current flows in one direction - potential differences across a load does not change(Both A and B)
Serial
Parallel circuit

45. What is the unit of measurement of resistance?
10%
Opposes any change in the current flowing in a circuit
Ohms
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

46. What is a common measure of wire diameter?
Tolerence
Gauge number
Opposition to movement of free electrons
Relationship between current and potential difference

47. What is the measure of potential difference?
Magnetic properties
DC current
Volts
Alternating current

48. What cannot be transformed to higher or lower potential differences?
Insulation resistance and Dielectric strength(Both A and B)
Cell
Choke
DC current

49. What type of circuit has one path of follow through a load?
Series circuit
Bare - covered - insulated - stranded - cable(All of the above)
Choke
The direction of the magnetic field

50. What is a property of inductors in electrical circuits?
1 watt
Serial
20%
Opposes any change in the current flowing in a circuit