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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. How many kinds of poles do magnets have?
Insulation resistance and Dielectric strength(Both A and B)
Porcelain
Two
Symbol

2. Which of the following is a type of resistor?
12 volts
Insulation resistance
Mutual induction
Fixed - tapped - variable(all of the above)

3. What is voltage?
Moving vehicles
Common - not rechargable - gradually discharges when in storage(All of the above)
A difference in potential energy
Two

4. What type of circuit has one path of follow through a load?
Use an effect to produce another effect
Series circuit
75 Ohms
Energy

5. What is the relationship between magnetism and electricity?
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)
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
Bare - covered - insulated - stranded - cable(All of the above)

6. Why is the transformer important to AC electricity?

7. What is the measure of potential difference?
Electromagnetism
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)
Volts
The direction the negative charge moves

8. What are the two generic methods to eliminate static electricity from metal objects?
The relationship of potential difference to current
Parallel circuit
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Bonding and grounding

9. What is the relationship between cells and batteries?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Cells can be connected together to make a battery
Ohms
Stores electrical charge

10. What type of circuit has two or more paths for current to follow?
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)
Fixed - Electrolytic - Variable(all of the above)
Parallel circuit
Cells can be connected together to make a battery

11. When reading resistance color codes - what does the first band indicate?
Fixed - tapped - variable(all of the above)
First digit
1 watt
Solenoid and Relay(both A and B)

12. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Composition of the resistor
A magnetic field
Silver
50 Ohms

13. What do electrical charges need to cause a fire or explosion?
Magnetic properties
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Heat
Wire splices

14. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Parallel
Insulation resistance
Use an effect to produce another effect
Serial

15. What does a first band of white mean?
Potential difference
First digit is 9
Produce heat - light - or limit current to control it(all of the above)
Solenoid and Relay(both A and B)

16. What does static electricity do?
Mutual induction
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
75 Ohms
Does not move

17. What are the names of two of the six primary methods of producing a voltage?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
15 -000 ohms - 20%
Does not move
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

18. What determines whether a spark can be produced?
Unlike poles attract
Plastic - Rubber - Friction(all of the above)
Strength of the charge
Chemical action

19. What is the purpose of a raceway?
Relationship between current and potential difference
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Tolerence
Opposition to movement of free electrons

20. What is the unit of measurement of electrical current?
Amperes
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Energy
Grounding wire

21. What is the fundamental property of insulators?
Voltmeter
Insulation resistance and Dielectric strength(Both A and B)
Breakdown voltage
Choke

22. What is a rigid metal conduit?
Composition of the resistor
Current change in a coil creates a magnetic change
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
5%

23. What is the relationship of conductor size and length to resistance?
Resistance value can not be changed
Symbol
Resistance increases as the conductor length increases
Electrical resistance against the flow of current

24. What is the type of cable composed of many fine wires?
10%
Battery
First digit
Stranded

25. To what measurement do the conductor mills refer?
1/1000th of an inch
10%
Volts
Cells can be connected together to make a battery

26. What is another name for an inductor?
Parallel
20%
Choke
Heat and current control(both a and c)

27. What is resistance?
Opposition to movement of free electrons
By their covering
Breakdown voltage
Amperes

28. What is resistance in electrical terms?
Circular and square mills(Both A and B)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Opposition to electrical current
DC current

29. What makes electrons flow?
Potential difference
Relationship between current and potential difference
1/1000th of an inch
Parallel circuit

30. Identify the blueprint symbol for capacitors.
The rate of doing work
Wire splices
Tolerence
Symbol

31. What does a transformer transform?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Two
The rate of doing work
The relationship of potential difference to current

32. What is the unit of measurement of potential difference?
Heat
Silver
Two
Volts

33. How is capacitance determined?
Potential difference
Area and spacing of capacitor - static current in the capacitor(both A and B)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
The rate of doing work

34. What is an electromagnet?
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
Plastic - Rubber - Friction(all of the above)
Strength of the charge

35. What is the term for two or more cells attached together?
Battery
Breakdown voltage
Stranded
Heat

36. What is a switch that operates by electricity?
A magnetic field
Relay
12 volts
Breakdown voltage

37. What wire measurement is commonly used in the U.S.?
Start with the band on the end and read to the center
American wire gauge(AWG)
Stranded
Mutual induction

38. What is a common measure of wire diameter?
Volts
Gauge number
Symbol
DC flows continuously in one direction and AC potential difference and current both change direction

39. What is a conductor?
The direction of the magnetic field
Potential difference
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

40. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Ability to store an electric charge
Start with the band on the end and read to the center
Serial
Relay

41. What does resistance produce?
Heat
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
12 volts
A difference in potential energy

42. What determines the resistance of a resistor?
Alternating current
Composition of the resistor
Solenoid and Relay(both A and B)
Use an effect to produce another effect

43. What types of protective tapes are used?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Plastic - Rubber - Friction(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)
5%

44. What is insulation resistance?
50 Ohms
--^V^V^V^---
Electrical resistance against the flow of current
Symbol

45. What is the purpose of resistors in electrical circuits?
Fixed - Electrolytic - Variable(all of the above)
Fixed - tapped - variable(all of the above)
Battery
Produce heat - light - or limit current to control it(all of the above)

46. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
The direction of the magnetic field
Unlike poles attract
Relationship between current and potential difference
Voltage

47. What is needed for electric heating elements and the filaments of light bulbs?
High resistance
Solenoid and Relay(both A and B)
Porcelain
10%

48. Which of the following materials is NOT a good conductor?
Porcelain
Unlike poles attract
Parallel
Cells can be connected together to make a battery

49. The generator is what method of creating potential energy?
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)
Electromagnetism
Solenoid and Relay(both A and B)

50. Which type of cell can be recharged?
Opposition to movement of free electrons
Porcelain
Secondary cell
Area and spacing of capacitor - static current in the capacitor(both A and B)