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WorksheetsTest #10
Total questions: 70
Worksheet time: 36mins
Name
Class
Date
1.
What significant digit does the red band represent?
a)
0
b)
1
c)
2
d)
3
2.
What significant digit does the blue band represent?
a)
4
b)
5
c)
6
d)
7
3.
What does the grey band represent?
a)
8
b)
8
c)
x100M
d)
0.05%
4.
Which of the following is closely related to mechanical engineering?
a)
polymer engineering
b)
civil engineering
c)
petroleum engineering
d)
robotics
5.
What is a load?
a)
a heavy weight
b)
something you carry
c)
what is being delivered
d)
how the energy of a circuit is used to do work
6.
Which of the following is closely related to mechanical engineering?
a)
nuclear engineering
b)
environmental engineering
c)
aerospace engineering
d)
electrical engineering
7.
When solar energy is collected in a storage medium such as water for later use, it is referred to as ____________?
a)
active solar technology
b)
passive solar technology
c)
photovoltaic technology
d)
concentrated steam generating technology
8.
What does HVAC stand for?
a)
high voltage alternating current
b)
heavy vehicle alternate construct
c)
heating ventilation and controls
d)
heating ventilation air conditioning
9.
What planet does NASA currently have multiple robots on?
a)
Mars
b)
the moon
c)
Venus
d)
Saturn
10.
Which of the following is not one of the five main steps of an electric power generating station?
a)
energy/fuel source
b)
smoke stack
c)
steam generation
d)
spinning of turbine
11.
What is the most common type of circuit used in wiring homes and businesses?
a)
series
b)
parallel
c)
Fourier transform
d)
degenerative
12.
What is this illustration explaining?
a)
electric charge
b)
current
c)
voltage
d)
resistance
13.
What are some of the components that a mechanical engineer needs to consider when designing a robot?
a)
power source, food storage
b)
locomotion, sensing
c)
manipulation, AI computer
d)
sensing, recyclability
14.
What is the distinction between electricity and electronics?
a)
one is an engineering subject and one is what electricians work on
b)
they are spelled differently
c)
one deals with flowing charge, one deals with controlling charge using devices
d)
one deals with flowing charge, one deals with controlling charge using devices they are basically the same thing
15.
Define current.
a)
the ability to do work
b)
the movement of atoms through a wire
c)
the flow of electricity through a conductor
d)
the flow of voltage through a wire
16.
Which of the following is NOT one of the byproduct uses of clean coal?
a)
wall board from gypsum
b)
concrete blocks from fly ash
c)
roof shingles from slag
d)
stronger steel from purer carbon
17.
Where is mechanical engineering ranked in terms of size compared to other engineering fields?
a)
first
b)
second
c)
third
d)
fourth
18.
What device protects a circuit by opening when too much current is demanded quickly
a)
transformer
b)
digital array
c)
circuit breaker
d)
capacitor bank
19.
What is the purpose of burning coal in a power plant?
a)
to heat massive amounts of air
b)
to boil water and generate steam
c)
to pressurize an engine
d)
to increase electrical resistance
20.
What are the four parts of every circuit?
a)
appetizer, salad, main course, dessert
b)
voltage source, switch, load, conductor
c)
first lap, second lap, third lap, fourth lap
d)
wires, motors, fans, resistors
21.
What is the formula for electrical power?
a)
power = voltage times current
b)
power = voltage times resistance
c)
power = voltage squared times current
d)
power = current divided by resistance
22.
Finish this statement, “If a pump represents a battery, then the pressure difference represents the .”
a)
current
b)
voltage
c)
charge
d)
resistance
23.
Who is perhaps the most famous mechanical engineer in the world today?
a)
Leonardo DaVinci
b)
Steve Jobs
c)
Tony Stark
d)
Elon Musk
24.
Which of the following is the symbol for the units of resistance?
a)
A
b)
V
c)
Ω
d)
μm
25.
What percentage of electricity in the US comes from burning coal?
a)
~ 50%
b)
< 25%
c)
12.6%
d)
~ 5%
26.
What is an electric charge?
a)
the zap from static electricity
b)
the way a battery charges up
c)
the property of matter that allows electrons to carry energy
d)
the movement of a current through a circuit
27.
Mechanical engineering predominantly uses the laws and principles of which branch of science?
a)
chemistry
b)
physics
c)
biology
d)
geology
28.
Which of the following is Ohm's law?
a)
P=IV
b)
V=IR
c)
F=ma
d)
v=d/t
29.
Which of the following is the units for measuring electrical energy?
a)
kilowatt-hours
b)
British Thermal Units
c)
Joules
d)
all of the above
30.
What is the grid?
a)
a nationwide system of interstate highways
b)
an extensive map of the land
c)
a nationwide system of electrical distribution
d)
a way to place coordinates in relation to one another
31.
How is electrical power calculated?
a)
power is energy per unit time
b)
power is energy times velocity squared
c)
power is charge times resistance
d)
all of the above
32.
What is the approximate efficiency of a coal burning power plant?
a)
13%
b)
35%
c)
50%
d)
95+%
33.
What is the main problem with burning coal to produce electricity?
a)
it produces a lot of noise
b)
it gives off a lot of waste heat
c)
it pollutes the air with nitrogen and sulfur oxides
d)
it leaves big holes in the ground
34.
Finish this statement, “If changing the diameter of a pipe changes the flow of air/liquid through the pipe, this represents the change of in a circuit.”
a)
current
b)
voltage
c)
charge
d)
resistance
35.
What prompted research into new ways to improve coal power plants?
a)
acid rain from air pollutants
b)
acid soaps used by consumers
c)
the cost of coal kept rising
d)
special interest groups in DC
36.
Define efficiency.
a)
input divided by output
b)
ratio of energy output to energy input
c)
divide possible by total
d)
multiply energy by power
37.
Use Ohm’s Law to determine the following. How much resistance is there in a motor that uses 20 A when plugged into a 120 V outlet.
a)
240 ohms
b)
0.16 volts
c)
6 ohms
d)
9 volts
38.
What is the schematic symbol?
a)
battery
b)
resistor
c)
antenna
d)
switch
39.
When using an ammeter, always start with the switch in which position?
a)
low setting
b)
high setting
c)
either setting is okay
d)
never use ammeters
40.
What is the "conventional flow direction" in electric theory.
a)
current alternates back and forth
b)
current always flows downhill due to gravity
c)
current flow from positive to negative
d)
current flows from negative to positive
41.
What does it mean if the ammeter needle rotates counterclockwise when you put it in a circuit?
a)
batteries are in backwards
b)
the electric current is flowing backward
c)
the ammeter is in backwards
d)
Ben Franklin was right!
42.
What type of electricity in homes and businesses is represented by this graph?
a)
direct current
b)
alternating current
c)
emf waves
d)
digital signal
43.
What are renewable resources?
a)
they grow in the sun
b)
they cannot be used up (endless supply)
c)
they are able to be resold to the company
d)
they are grown organically
44.
Is this a series, parallel or combined circuit?
a)
series
b)
combined
c)
parallel
d)
complex
45.
Convert 112,560 milliamps into amps?
a)
112,560,000 amps
b)
112.56 amps
c)
1.1256 amps
d)
0.00112 amps
46.
An electric current is the flow of charges through a conductor. Where do these charges come from?
a)
battery
b)
switch
c)
wires
d)
all of the above
47.
How can the photovoltaic cells be improved to increase efficiency and lower cost?
a)
develop antiglare coatings
b)
have PV cells tracks the sun
c)
improve manufacturing methods to save silicon
d)
all of the above
48.
In the water analogy of an electric circuit, what represents the voltage source (battery)?
a)
pipes
b)
faucet/spigot
c)
water wheel
d)
pump
49.
Which of the following is the symbol for resistance?
a)
Ω
b)
Δ
c)
ω
d)
A
50.
Give three physical factors that affect resistance in a wire?
a)
length, cost, thickness
b)
temperature, ductility, density
c)
material, length, temperature
d)
material, shape, cost
51.
What is a load?
a)
a device that changes electrical energy into power
b)
when someone tries to bluff you
c)
a heavy burden such as that carries by Everyman in Pilgrim's Progress
d)
a device that changes electrical energy into another form by doing work
52.
In the water analogy of an electric circuit, what represents the conductors?
a)
pipes
b)
faucet/spigot
c)
water wheel
d)
pump
53.
How many volts would this schematic be?
a)
1.5 V
b)
3 V
c)
4.5 V
d)
9 V
54.
Most of the electrical generation from solar power is done today through an electronic device known as ______?
a)
active solar technology
b)
passive solar technology
c)
photovoltaic technology
d)
concentrated steam generating technology
55.
What is the maximum reading on your ammeter when on low setting.
a)
3 A
b)
3 mA
c)
0.3 mA
d)
3 μA
56.
What is the name of the device that is used to decrease (or increase) voltage from the grid to something usable by a business or home?
a)
theostat
b)
potentiometer
c)
transformer
d)
circuit breaker
57.
How does a generator break?
a)
you flip the switch and pray
b)
it burns diesel fuel to spin a turbine which turns a generator to create electricity
c)
it magnetizes the building to let the electricity back into the wall outlets
d)
it helps the grid by "backing up" into voltage difference
58.
What does UPS stand for?
a)
United Parcel Service
b)
Uninterrupted Power Supply
c)
Unimaginative People Source
d)
Uncomfortable Personal Space
59.
Is the most common source of electricity in homes and businessed alternating current or direct currrent?
a)
direct current
b)
alternating current
c)
about 50/50
d)
neither; they use emf waves
60.
What causes you to get zapped by electricity if you are careless?
a)
poorly designed equipment
b)
static electricity
c)
you become charged up
d)
you become part of the circuit
61.
How can appliances and such be protected from damage and also protect people from getting shocked?
a)
run parallel control lines
b)
uses a ground wire
c)
rubber floor insulators
d)
capacitor bank
62.
Does solar energy lend itself to a decentralized or a centralized electrical generation plan?
a)
centralized grid
b)
decentralized grid
c)
compound efficiency model
d)
separate renewable grid
63.
South-facing windows in a home or business is an example of ___________?
a)
active solar technology
b)
passive solar technology
c)
photovoltaic technology
d)
concentrated steam generating technology
64.
How do homes handle the fact that the sun only shines half of each day?
a)
they use the grid power at night
b)
they don't use electricity after dark
c)
they switch to candles and flashlights
d)
they go to a neighbor's house that does use solar power
65.
What is one of the most glaring drawbacks to converting to solar power?
a)
the efficiency is less than 15%
b)
the companies mark up the panels too much
c)
the raw material is rare
d)
the sun frequently goes behind clouds
66.
What is the best time to generate electricity using solar power?
a)
in the early morning
b)
when it is light out
c)
at night when demand is low
d)
only on weekends
67.
If multiple vertical lines appear in an arrowtail, what conclusion can be drawn?
a)
The bulb will not light.
b)
The voltage difference is small.
c)
The current is strong.
d)
Nothing.
68.
If you were purchasing Christmas lights, which type of circuit would be preferable if you had a single light blow?
a)
series
b)
parallel
c)
combined
d)
complex
69.
If a lightbulb has a very thin filament, what can be determined about the resistance?
a)
The bulb has a small amount of resistance.
b)
The bulb has a great amount of resistance.
c)
The amount of resistance cannot be determined by the diameter of the filament.
d)
The bulb doesn't have resistance.
70.
Which of the following are NOT a material or construction of resistors?
a)
Copper
b)
Wirewound
c)
Carbon Film
d)
Metal Film
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