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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. To what measurement do the conductor mills refer?
Stores electrical charge
Gauge number
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
1/1000th of an inch

2. What are the two generic methods to eliminate static electricity from metal objects?
Bonding and grounding
Stranded
Circular and square mills(Both A and B)
Does not move

3. Which type of cell can be recharged?
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)
Stores electrical charge
Secondary cell
From the negative battery terminal to the positive terminal

4. Which of the following is a type of resistor?
The direction the negative charge moves
Use an effect to produce another effect
Electromagnetism
Fixed - tapped - variable(all of the above)

5. How do you read resistor color codes?
Chemical action
Start with the band on the end and read to the center
Relay
The rate of doing work

6. What is a type of capacitor?
Stranded
Fixed - Electrolytic - Variable(all of the above)
Serial
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)

7. Where do the fingers point in both Left-Hand Rules?
Use an effect to produce another effect
Purging
The direction of the magnetic field
Secondary cell

8. What do electrical charges need to cause a fire or explosion?
High resistance
50 Ohms
Serial
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

9. What is the measure of potential difference?
Breakdown voltage
The rate of doing work
Volts
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

10. What is a characteristic of insulators?
The direction of the magnetic field
Resistance value can not be changed
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Fixed - Electrolytic - Variable(all of the above)

11. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Voltage
12 volts
Gauge number

12. Which material has the lowest resistance at ordinary temperatures?
20%
Secondary cell
Purging
Silver

13. What do transducers do in electrical terms?
Use an effect to produce another effect
Ohms
Relay
Choke

14. What results when current is run through a material with high resistance?
Wire splices
5%
Heat and current control(both a and c)
Volts

15. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
By their covering
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Breakdown voltage

16. What does Ohm's Law represent?
Purging
Tolerence
Relationship between current and potential difference
Strength of the charge

17. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
High resistance
20%
A difference in potential energy
Start with the band on the end and read to the center

18. What is the unit of measurement of resistance?
Ohms
50 Ohms
Moving vehicles
Unlike poles attract

19. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Start with the band on the end and read to the center
Serial
Common - not rechargable - gradually discharges when in storage(All of the above)
5%

20. What does an object have if a magnetic field acts on it?
Magnetic properties
Series circuit
Heat and current control(both a and c)
Heat

21. What does a moving charge produce?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
20%
A magnetic field
Breakdown voltage

22. What is a common measure of wire diameter?
High resistance
Gauge number
First digit
Porcelain

23. What is a common cause of static electricity in a shop?
Cells can be connected together to make a battery
A magnetic field
Moving vehicles
Insulation resistance

24. What is the difference between AC and DC?
Porcelain
DC flows continuously in one direction and AC potential difference and current both change direction
Fixed - Electrolytic - Variable(all of the above)
75 Ohms

25. Where does the thumb point in both Left-Hand Rules?
Magnetic properties
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
The direction the negative charge moves
15 -000 ohms - 20%

26. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
Stores electrical charge
Grounding wire
Electrical resistance against the flow of current

27. What does a first band of white mean?
Cells can be connected together to make a battery
Electromagnetism
Ohms
First digit is 9

28. What is voltage?
A difference in potential energy
From the negative battery terminal to the positive terminal
Fixed - tapped - variable(all of the above)
20%

29. Identify the general blueprint symbol for inductors.
Symbol
Use an effect to produce another effect
Wire splices
Cell

30. The dry cell is what method for creating potential energy?
20%
Heat
Heat
Chemical action

31. What does resistance produce?
Cables
Heat
Bonding and grounding
Opposes any change in the current flowing in a circuit

32. What cannot be transformed to higher or lower potential differences?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Opposes any change in the current flowing in a circuit
DC current
How much potential difference can a material withstand before breaking down

33. What is the purpose of a raceway?
Produce heat - light - or limit current to control it(all of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Ohms
DC flows continuously in one direction and AC potential difference and current both change direction

34. What is true about a dry cell?
Voltmeter
Common - not rechargable - gradually discharges when in storage(All of the above)
--^V^V^V^---
Bare - covered - insulated - stranded - cable(All of the above)

35. What is power?
Potential difference
The rate of doing work
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Parallel circuit

36. What are the common units of measurement for round and square conductor cross - sections?
Circular and square mills(Both A and B)
Relationship between current and potential difference
75 Ohms
Alternating current

37. Which way is the current going in the circuit shown?(electron flow)
Ohms
From the negative battery terminal to the positive terminal
Current change in a coil creates a magnetic change
Battery

38. What is another name for an inductor?
Choke
Alternating current
Amperes
Energy

39. The generator is what method of creating potential energy?
Produce heat - light - or limit current to control it(all of the above)
Bonding and grounding
Resistance value can not be changed
Electromagnetism

40. What is the use of the electromagnet?
Resistance value can not be changed
Gauge number
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction

41. What is a switch that operates by electricity?
Relay
High resistance
Bonding and grounding
10

42. What are the names of two of the six primary methods of producing a voltage?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
By their covering
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Moving vehicles

43. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Unlike poles attract
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
1 watt
Mutual induction

44. What types of protective tapes are used?
Resistance increases as the conductor length increases
Start with the band on the end and read to the center
Serial
Plastic - Rubber - Friction(all of the above)

45. What is resistance in electrical terms?
Two
Opposition to electrical current
A magnetic field
Current change in a coil creates a magnetic change

46. What is an arrangement of materials that create a potential difference by chemistry?
Composition of the resistor
10
Potential difference
Cell

47. What is capacitance in electrical terms?
Unlike poles attract
Stores electrical charge
Ability to store an electric charge
Wire splices

48. How is capacitance determined?
10
Common - not rechargable - gradually discharges when in storage(All of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Porcelain

49. What makes electrons flow?
Potential difference
Current change in a coil creates a magnetic change
DC flows continuously in one direction and AC potential difference and current both change direction
Resistance value can not be changed

50. What makes electrons flow?
Resistance increases as the conductor length increases
Electromagnetic field
Potential difference
Secondary cell