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ME 454_ Mechatronics (Penn State) Exam 1 QUESTIONS WITH 100- CORRECT ANSWERS!!_.pdf
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ME 454_ Mechatronics (Penn State) Exam 1 QUESTIONS WITH 100- CORRECT ANSWERS!!_.pdf
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8/13/24, 6:32 AMME 454: Mechatronics (Penn State) Exam 1
Jeremiah
Terms in this set (93)
The Greenswork Zero-turn radius Probably not safe - the voltage is slightly above that of electrocution.
lawnmower features a 60-volt battery - Is this
safe?
1) The users will not touch the leads of the battery.
The Greenswork Zero-turn radius 2) If the user touches the leads, the skin is not very conductive (not sweaty, for
lawnmower features a 60-volt battery. What example).
assumptions are being made by the 3) The user will not drive the mower into water.
engineers? 4) The voltage is close enough to the limit that, if a user is handling the battery, it is
probably low enough in voltage to be safe to handle.
The Greenswork Zero-turn radius It won't easily poison the user or environment if handled, especially if the battery
lawnmower features a 60-volt battery. How is corrodes.
the battery safer by using lithium-ion
technology?
How many 12-volt car batteries can be used 4 (Must be less than 50 V, so 12 V * 4 = 48 V < 50 V)
in series before a possible electrocution?
What bad thing can happen if you put your Poisoning.
finger in your mouth after burning it?
What bad thing can happen if you simply Burn gets worse.
blow on your finger after burning it?
What bad thing can happen if you hold your Burn gets worse.
finger in your hand and cut off any
circulation that can spread the burn, after
burning it?
"set up" or "loop": Something that sets the Setup
initial value of the output on Pin 2.
"set up" or "loop": A routine that only needs Setup
to run 30 times, then never run again.
"set up" or "loop": A routine that continually Loop
blinks an LED on or off, forever.
1/11
, 8/13/24, 6:32 AM
"set up" or "loop": A routine that buzzes only Loop
when a user flips a switch, and the switch can
be flipped over and over, forever, to turn the
buzzer on/off.
"set up" or "loop": A routine that buzzes only Setup
the first time the Arduino turns on.
"set up" or "loop": A routine that prints Loop
continuous updates on the Arduino's status
when running.
The following code is from the 1) Hard-coding the number for the pins for input and output.
DigitalInputPullup example, from the built-in 2) Writing an if statement such that a variable appears before the constant in an
examples on the Arduino's "Examples" folder. equality or inequality operation.
It runs, but includes several coding practices
that are not very good. Note: the header
comments are not included, but this isn't the
problem we are examining - the problems
are in the code, not comments.
In the code below, what are two poor
practices that should be avoided?
Other than cutting through the circuit board The board is likely to be damaged by static build-up due to the way the hand is on top
with a Dremel, why is it likely that this circuit of the board.
board could be damaged in the images
below?
Say you were checking a clock to see if a 1- Maximum = 1/2 times the measurement
hour class is over. So, 1/2*60 = 30 minutes
What would be the MAXIMUM time you
should wait before checking the clock,
according to Nyquist sampling theory?
(Minutes)
Say you were checking a clock to see if a 1- X = 60 minutes/10
hour class is over. X = 6 minutes
Suggested: Want to measure system at roughly 10 times the fastest frequency
What would be a SUGGESTED time to wait
before checking the clock?
(Minutes)
Say you were recording music, assuming that Minimum = 2 times faster than what we want
the human ears can hear to 20 kHz. 20 kHz * 2 = 40 kHz
What would be the MINIMUM frequency to
sample sound, according to Nyquist
sampling theory?
Say you were recording music, assuming that Suggested: Want to measure system at roughly 10 times the fastest frequency
human ears can hear to 20 kHz.
X = 20*10 = 200 kHz
What would be a SUGGESTED frequency to
sample sound?
ME 454: Mechatronics (Penn State) Exam 1
2/11
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