Test your basic knowledge |

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 do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Unlike poles attract
Breakdown voltage
Purging
Solenoid and Relay(both A and B)

2. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Cables
Bonding and grounding
50 Ohms
The rate of doing work

3. A resistor is color coded brown - green - orange. What is its resistance?
15 -000 ohms - 20%
Moving vehicles
Chemical action
The direction of the magnetic field

4. What is the term for two or more cells attached together?
Voltmeter
Circular and square mills(Both A and B)
The relationship of potential difference to current
Battery

5. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
Cells can be connected together to make a battery
Electromagnetic field
Fixed - Electrolytic - Variable(all of the above)

6. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Composition of the resistor
Current change in a coil creates a magnetic change
Potential difference

7. What are the common units of measurement for round and square conductor cross - sections?
Current change in a coil creates a magnetic change
Circular and square mills(Both A and B)
High resistance
Stores electrical charge

8. Identify the blueprint symbol for capacitors.
Mutual induction
Serial
Symbol
Does not move

9. What is the unit of measurement of potential difference?
Voltage
Volts
Produce heat - light - or limit current to control it(all of the above)
First digit is 9

10. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
5%
Composition of the resistor
20%
Area and spacing of capacitor - static current in the capacitor(both A and B)

11. What is the use of the electromagnet?
Current change in a coil creates a magnetic change
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
A magnetic field
First digit

12. What is power?
Battery
The rate of doing work
Opposes any change in the current flowing in a circuit
Circular and square mills(Both A and B)

13. When does a DC circuit oppose current flow?
Electromagnetic field
Energy
Mutual induction
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

14. The dry cell is what method for creating potential energy?
First digit is 9
Volts
Chemical action
Series circuit

15. How is the heat production measured in a resistor?
Composition of the resistor
Insulation resistance and Dielectric strength(Both A and B)
Potential difference - E*I - current times current change from point to point(all of the above)
1 watt

16. What results when current is run through a material with high resistance?
Fixed - tapped - variable(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Insulation resistance and Dielectric strength(Both A and B)
Heat and current control(both a and c)

17. What is capacitance in electrical terms?
5%
Series circuit
Ability to store an electric charge
Opposes any change in the current flowing in a circuit

18. What do electrical charges need to cause a fire or explosion?
15 -000 ohms - 20%
Voltage
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
American wire gauge(AWG)

19. What is the name for electrical resistance of insulation?
Series circuit
50 Ohms
Insulation resistance
The direction of the magnetic field

20. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Grounding wire
A magnetic field
Serial
Ohms

21. What type of circuit has two or more paths for current to follow?
Solenoid and Relay(both A and B)
Parallel circuit
Volts
Symbol

22. What is a switch that operates by electricity?
Two
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Relay
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

23. What is voltage?
Solenoid and Relay(both A and B)
Does not move
A difference in potential energy
Moving vehicles

24. What is a common measure of wire diameter?
Symbol
75 Ohms
Secondary cell
Gauge number

25. The thermocouple uses which method for creating potential energy?
Cell
Heat
10%
Insulation resistance and Dielectric strength(Both A and B)

26. What does a transformer transform?
The relationship of potential difference to current
Tolerence
Resistance increases as the conductor length increases
Cell

27. What cannot be transformed to higher or lower potential differences?
20%
DC flows continuously in one direction and AC potential difference and current both change direction
DC current
Fixed - tapped - variable(all of the above)

28. What is true about a dry cell?
Volts
Stranded
Heat
Common - not rechargable - gradually discharges when in storage(All of the above)

29. What information do the Left-Hand Rules provide?
Unlike poles attract
Direction of: electric charge - magnetic field - force of the moving charge(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)
Parallel

30. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Silver
Moving vehicles
Potential difference

31. What are the names of two of the six primary methods of producing a voltage?
Symbol
10%
Insulation resistance
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

32. What do transducers do in electrical terms?
Gauge number
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Use an effect to produce another effect
How much potential difference can a material withstand before breaking down

33. In most applications - what remains constant if the current remains constant and flows in one direction?
Moving vehicles
Two
American wire gauge(AWG)
Electromagnetic field

34. What is an electromagnet?
Area and spacing of capacitor - static current in the capacitor(both A and B)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
10
Insulation resistance

35. What is the relationship between magnetism and electricity?
Gauge number
Battery
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)
The direction of the magnetic field

36. What is needed for electric heating elements and the filaments of light bulbs?
Energy
Potential difference - E*I - current times current change from point to point(all of the above)
Plastic - Rubber - Friction(all of the above)
High resistance

37. What is the term for doing work at the rate of joule per second?
1 watt
Strength of the charge
Potential difference
Opposition to electrical current

38. What is the purpose of resistors in electrical circuits?
10
Produce heat - light - or limit current to control it(all of the above)
First digit is 9
Heat

39. To what measurement do the conductor mills refer?
50 Ohms
1/1000th of an inch
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Potential difference

40. What is dielectric strength?
How much potential difference can a material withstand before breaking down
Common - not rechargable - gradually discharges when in storage(All of the above)
Electromagnetism
DC flows continuously in one direction and AC potential difference and current both change direction

41. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Secondary cell
Cells can be connected together to make a battery
A magnetic field
Voltage

42. What is the difference between AC and DC?
DC flows continuously in one direction and AC potential difference and current both change direction
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Fixed - tapped - variable(all of the above)
Voltage

43. Why is the transformer important to AC electricity?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

44. What wire measurement is commonly used in the U.S.?
DC current
American wire gauge(AWG)
Symbol
Voltage

45. 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
75 Ohms
The relationship of potential difference to current
12 volts
Resistance value can not be changed

46. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
Amperes
Fixed - tapped - variable(all of the above)
First digit is 9

47. Which type of cell can be recharged?
Secondary cell
Plastic - Rubber - Friction(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Amperes

48. What is a common cause of static electricity in a shop?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Moving vehicles
Battery
Secondary cell

49. Which way is the current going in the circuit shown?(electron flow)
Secondary cell
Heat and current control(both a and c)
Choke
From the negative battery terminal to the positive terminal

50. How is capacitance determined?
Cell
5%
Area and spacing of capacitor - static current in the capacitor(both A and B)
A difference in potential energy