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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 is a type of resistor?
Heat
Ohms
Heat and current control(both a and c)
Fixed - tapped - variable(all of the above)

2. Identify the general blueprint symbol for inductors.
Symbol
Secondary cell
15 -000 ohms - 20%
Stranded

3. What is the purpose of resistors in electrical circuits?
Purging
Produce heat - light - or limit current to control it(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)
Moving vehicles

4. What is power?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
The rate of doing work
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Purging

5. What is a type of mechanical transducer?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Electromagnetic field
Solenoid and Relay(both A and B)
Ohms

6. What is a property of inductors in electrical circuits?
Cell
Parallel
Opposes any change in the current flowing in a circuit
Opposition to movement of free electrons

7. What is the measure of potential difference?
Volts
Cell
Porcelain
--^V^V^V^---

8. What is resistance?
Opposition to movement of free electrons
10%
Series circuit
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

9. What are the common units of measurement for round and square conductor cross - sections?
Circular and square mills(Both A and B)
Unlike poles attract
Solenoid and Relay(both A and B)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

10. What is voltage?
Serial
Insulation resistance
A difference in potential energy
Electromagnetism

11. What is an arrangement of materials that create a potential difference by chemistry?
From the negative battery terminal to the positive terminal
Electromagnetism
1/1000th of an inch
Cell

12. What does a transformer transform?
Choke
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
15 -000 ohms - 20%
The relationship of potential difference to current

13. Where do the fingers point in both Left-Hand Rules?
First digit
The direction of the magnetic field
Symbol
Cell

14. What is the difference between AC and DC?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
Ability to store an electric charge
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)

15. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
Start with the band on the end and read to the center
Opposes any change in the current flowing in a circuit
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

16. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Cells can be connected together to make a battery
10%
Silver
Alternating current

17. The dry cell is what method for creating potential energy?
Resistance increases as the conductor length increases
Chemical action
Moving vehicles
Parallel

18. What is the purpose of a raceway?
Resistance value can not be changed
10
To prevent Physical - Chemical to wiring - to prevent damage to people and property(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)

19. 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
High resistance
12 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)
American wire gauge(AWG)

20. What is the unit of measurement of resistance?
Heat
Grounding wire
Cell
Ohms

21. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
50 Ohms
Electrical resistance against the flow of current
Potential difference

22. Which of the following materials is NOT a good conductor?
Amperes
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Symbol
Porcelain

23. The thermocouple uses which method for creating potential energy?
1/1000th of an inch
Cells can be connected together to make a battery
Heat
Bonding and grounding

24. What do we call the ability to do work?
Circular and square mills(Both A and B)
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)
Energy
From the negative battery terminal to the positive terminal

25. What instrument measures voltage?
Parallel
Energy
Voltmeter
Relationship between current and potential difference

26. What can permanently break down a capacitor?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Resistance increases as the conductor length increases
Breakdown voltage
Relationship between current and potential difference

27. How is the heat production measured in a resistor?
Stranded
By their covering
Potential difference - E*I - current times current change from point to point(all of the above)
Alternating current

28. What is a wire classification?
Bare - covered - insulated - stranded - cable(All of the above)
50 Ohms
20%
Grounding wire

29. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
A difference in potential energy
First digit
Parallel circuit
50 Ohms

30. What are the two generic methods to eliminate static electricity from metal objects?
From the negative battery terminal to the positive terminal
The direction the negative charge moves
Opposition to movement of free electrons
Bonding and grounding

31. What is induction?
Fixed - tapped - variable(all of the above)
Moving vehicles
Volts
Current change in a coil creates a magnetic change

32. What does an object have if a magnetic field acts on it?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Magnetic properties
High resistance
1/1000th of an inch

33. What does static electricity do?
Heat and current control(both a and c)
DC flows continuously in one direction and AC potential difference and current both change direction
First digit
Does not move

34. What makes electrons flow?
Potential difference
Bare - covered - insulated - stranded - cable(All of the above)
Battery
Circular and square mills(Both A and B)

35. What is a characteristic of insulators?
Secondary cell
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
The relationship of potential difference to current
Magnetic properties

36. When reading resistance color codes - what does the first band indicate?
First digit
DC flows continuously in one direction and AC potential difference and current both change direction
Plastic - Rubber - Friction(all of the above)
The direction of the magnetic field

37. Given R=E / I and the following information - plug in the data and solve the problem for resistance. 1.5 volt walkman battery - 0.02 amps of current
Purging
Magnetic properties
75 Ohms
Potential difference - E*I - current times current change from point to point(all of the above)

38. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Cables
5%
Electrical resistance against the flow of current
Heat

39. Identify the blueprint symbol for capacitors.
Symbol
The direction the negative charge moves
Use an effect to produce another effect
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

40. What types of protective tapes are used?
Breakdown voltage
Plastic - Rubber - Friction(all of the above)
Circular and square mills(Both A and B)
Relay

41. What is a type of capacitor?
First digit
Fixed - Electrolytic - Variable(all of the above)
Stranded
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

42. What is the type of cable composed of many fine wires?
Resistance value can not be changed
Secondary cell
Voltage
Stranded

43. What is a switch that operates by electricity?
15 -000 ohms - 20%
Secondary cell
First digit
Relay

44. The generator is what method of creating potential energy?
Bare - covered - insulated - stranded - cable(All of the above)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Energy
Electromagnetism

45. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
DC flows continuously in one direction and AC potential difference and current both change direction
From the negative battery terminal to the positive terminal
Insulation resistance

46. What does Ohm's Law represent?
Relationship between current and potential difference
Chemical action
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Plastic - Rubber - Friction(all of the above)

47. Which material has the lowest resistance at ordinary temperatures?
Secondary cell
A magnetic field
Silver
Stranded

48. Why is the transformer important to AC electricity?

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49. How many kinds of poles do magnets have?
Two
Chemical action
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Bare - covered - insulated - stranded - cable(All of the above)

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