Name: 
 

Review for Safety and Electricity Unit


True/False
Indicate whether the statement is true or false.
 

 1. 
The flow of electrons is from a negatively charged location to a positively charged location.
 

 2. 
Plastic is an excellent conductor.
 

 3. 
Copper is an excellent conductor.
 

 4. 
Electrons are attracted by negative locations.
 

 5. 
Potential is the difference between the positive and negative charges in a circuit.
 

 6. 
A surge protector should be replaced every six months.
 

 7. 
A grounding strap should always be worn when working on a power supply.
 
 
nar001-1.jpg
 

 8. 
The image in 1-1 displays proper lifting technique.
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 9. 
Electrons have a ___ charge.
a.
Negative
c.
Neutral
b.
Positive
d.
Differential
 

 10. 
Electrons move from one atom to another through
a.
push of current
c.
ohms
b.
pull of flow
d.
amps
 
 
Image 2

nar002-1.jpg
 

 11. 
What would you set your img 2 device to in order to measure the amount of difference in the flow of electricity?
a.
Com Jack
c.
AC Volts
b.
AC Amps
d.
Resistance
 

 12. 
What would you set your img 2 device to in order to measure the amount of resistance in a copper cable?
a.
Com Jack
c.
AC Volts
b.
AC Amps
d.
ohms
 

 13. 
Every atom contains one or more:
a.
nucleus
c.
proteins
b.
atoms
d.
electrons
 

 14. 
Force is a measure of:
a.
volts
c.
amps
b.
ohms
d.
resistance
 

 15. 
When measuring this, attach the leads to either side of a component and measure the difference between the two.
a.
volts
c.
amps
b.
ohms
d.
resistance
 

 16. 
When measuring this, be sure to place the probe in the path of the flow.
a.
volts
c.
amps
b.
ohms
d.
resistance
 

 17. 
When measuring this, be sure the power is OFF.
a.
volts
c.
amps
b.
ohms
d.
current
 

 18. 
This is a measurement of the volume of the electricity flow..
a.
volts
c.
amps
b.
ohms
d.
current
 

 19. 
This current cycles back and forth.
a.
AC
b.
DC
 

 20. 
This current travels in one direction only.
a.
AC
b.
DC
 

 21. 
This is a situation where electricity flows uncontrolled from a hot line to a neutral line or to the ground.
a.
ground
c.
spark
b.
short
d.
snort
 

 22. 
In a PC the ground wire is usually:
a.
black
c.
green
b.
red
d.
yellow
 

 23. 
In a PC the red wire indicates:
a.
ground
c.
neutral
b.
hot
d.
negative
 

 24. 
In a home the white wire indicates:
a.
ground
c.
neutral
b.
hot
d.
negative
 

 25. 
A(n) _________ resists the flow of electricity.
a.
resistance
c.
insulator
b.
conductor
d.
semiconductor
 

 26. 
A ___ is made of layers of semiconductor material that serves as a gate or switch for an electrical signal and can amplify the flow of electricity.
a.
insulator
c.
gage
b.
transistor
d.
semiconductor
 

 27. 
Hold an electrical charge for a period of time.
a.
diode
c.
capacitor
b.
led
d.
resistor
 

 28. 
Allows the flow of electricity to move in only one direction.
a.
diode
c.
capacitor
b.
led
d.
resistor
 
 
Image 3
nar003-1.jpg
 

 29. 
The wattage rating on image 3 is:
a.
12
c.
3.3
b.
30
d.
300
 

 30. 
Electricity flows from _____ to ____.
a.
North to south
c.
Positive to negative
b.
Negative to positive
d.
Right to left
 

 31. 
Which is the proper orientation for batteries to complete a circuit?
a.
mc031-1.jpg
c.
mc031-2.jpg
b.
Either works
d.
Neither works
 

 32. 
Electrons in motion are
a.
ams
c.
voltage
b.
current
d.
ohms
 

 33. 
Voltage is best described as
a.
The current or flow
c.
The force behind the current
b.
Something that slows electrons down
d.
The value of static coming off a specific device
 

 34. 
Ohms law states
a.
Voltage is required for current
c.
When voltage increases, amperage decreases
b.
When resistance increases, amperage decreases
d.
Amps are required for current
 

 35. 
This is your primary responsibility as a technician on the job.
a.
Solve problems
c.
Repair computers
b.
Ensure the safety of yourself and others
d.
Remove power from power supply
 

 36. 
A power supply is a:
a.
FRU
c.
SU
b.
SVU
d.
None of these
 

 37. 
This fire extinguisher is for use on wood, fire, or paper fires.
a.
A
c.
C
b.
B
d.
D
 

 38. 
This fire extinguisher is for use on flammable liquid.
a.
A
c.
C
b.
B
d.
D
 

Multiple Response
Identify one or more choices that best complete the statement or answer the question.
 

 39. 
Which of the following is true about atoms?
 a.
Every atom contains one or more nucleii
 e.
Every electron carries a negative charge
 b.
Every atom contains one or more electrons
 f.
Every nucleus carries a positive charge
 c.
Every atom contains a nucleus
 g.
Every nucleus carries a negative charge
 d.
Every electron carries a positive charge
 h.
Nucleii orbit around the electron
 

 40. 
A rectifier can change which type of current?
 a.
AC
 b.
DC
 

 41. 
Bono is having problems. His computer started just fine yesterday. Today it won’t start up at all. Which of the following are things you should check first?
 a.
Is it plugged in?
 e.
Are the fans spinning?
 b.
Is it turned on?
 f.
Has someone changed the voltage from 115 to 230?
 c.
Is there a light on the LED on the motherboard?
 g.
Is the processor correctly seated?
 d.
Does the hard drive light come on?
 

 42. 
Which of the following would be useful in areas where power is dirty or dips?
 a.
surge protector
 c.
APC
 b.
UPS
 d.
Line conditioner
 

 43. 
Which of the following will keep a computer running in the event of a power outage, and then will shut the computer down safely if power doesn’t return?
 a.
surge protector
 c.
APC
 b.
UPS
 d.
Line conditioner
 

 44. 
What three things are required for a circuit?
 a.
Positive terminal
 c.
Conductor
 b.
Negative terminal
 d.
Insulator
 

 45. 
Which of the following should be done before you start working on a computer?
 a.
Remove CMOS battery
 e.
Ensure your are properly grounded
 b.
Remove laptop battery (if laptop)
 f.
Clean area
 c.
Unplug
 g.
Warn others that you are working
 d.
Wash your hands
 

 46. 
Which of the following should be done before working on a computer. Choose all that apply.
 a.
Clear station
 d.
Check for proper fire extinguisher
 b.
Remove power from wall or device
 e.
Ground the computer to the wall
 c.
Ensure you are grounded
 f.
Degauss the power supply
 

 47. 
Which of the following should not be worked on due to the power contained in the capacitors?
 a.
Power supply
 d.
Laser printer
 b.
CRT
 e.
Motherboard
 c.
LCD Monitor
 

 48. 
Which fire extinguisher would be good for an electrical fire.
 a.
A
 c.
C
 b.
B
 d.
ABC
 

Numeric Response
 

 49. 
A computer power supply converts the house voltage from ____ to 3.3, 5, or 12 volts for computer use.

 

 50. 
The US uses __ voltage     

 

 51. 
The UK uses __ voltage     

 

 52. 
AC in the US is rated at _ _ _ volts

 

 53. 
AC in the US cycles at _ _ cycles per second

 

 54. 
AC in Europe cycles at _ _ cycles per second

 

Completion
Complete each statement.
 
 
nar004-1.jpg
 

 55. 
Img 1 is a
 

 

 56. 
B in Img 1 is a(n)
 

 

 57. 
Conductors have ____ electrons which can move around.
 

 

 58. 
There is a direct/indirect relationship between voltage and current.
 

 
 
Image 3
nar003-1.jpg
 

 59. 
This power supply would work on a(n) _______ motherboard.
 

 

 60. 
A dip in power is also known as a _______.
 

 

 61. 
Opposite charges ___________
 

 

 62. 
Electrons always flow to the ______________
 

 

Matching
 
 
a.
All matter is composed of this
e.
Opposites attract is part of  ____ law.
b.
Every cell has a _________ that attracts electrons
f.
This dude proved that lightning was electricity
c.
A _______ has tightly bound electrons.
g.
Electrons carry a _________ charge.
d.
If electrons flow freely from one atom to another, the material is considered an electrical
h.
These little guys orbit around an atom’s nucleus
 

 63. 

 nucleus
 

 64. 

 electrical insulator
 

 65. 

 Coulumb’s
 

 66. 

 atoms
 

 67. 

 conductor
 

 68. 

 Franklin
 

 69. 

 electrons
 

 70. 

 negative
 



 
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