Exam (elaborations)
ENGR 217 Final Exam
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Exam of 8 pages for the course EGR 217: Exam at EGR 217: Exam (ENGR 217 Final Exam)
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ENGR 217 Final ExamEngineers shall hold paramount_________ - ANS-The safety, health, and welfare of the
public
Engineers shall perform services only in ________ - ANS-areas of their competence
Engineers shall issue public statements only ___________ - ANS-in an objective and
truthful manner
Engineers shall act for each employer or client as ________ - ANS-faithful agents or
trustees
Engineers shall avoid _______ acts - ANS-deceptive
Engineers shall conduct themselves honorably, responsibly, ethically, and lawfully so as
to _________ - ANS-enhance the honor, reputation, and usefulness of the profession
What is the difference between differential and single-ended measurements (when
using a DAQ) - ANS-Single-ended- measuring the voltage between a wire and the
DAQ's ground
differential- measuring the voltage difference between 2 wires, more accurate than
single-ended
a 4-bit ADC can encode numbers from _____ to ______ - ANS-0 - 15
(4 bits = 4 binary digits from 0000 -> 1111)
How do you find the resolution of an ADC? - ANS-Divide the range (in Volts) by the
number of possible outputs
(ex: a 4-bit ADC with a range of 5V has a resolution of 5/16=0.3125 V)
What are the 2 types of DAQs, and what are their advantages/disadvantages? -
ANS-Flash ADC- faster, but more expensive, uses more hardware
Successive approximation- slower, but cheaper, uses more software and less hardware
What is 'noise' in electronic systems, and how can its effects be mitigated? -
ANS-random, uncorrelated, zero-mean errors in electronic systems
(zero-mean: the noise on average is 0 volts)
, Take multiple measurements to mitigate the effects of noise
What is Johnson-Nyquist noise? What does it depend on? Can it be avoided? -
ANS-Random voltage variation from electrons jumping around due to heat energy
Depends on temperature
Unavoidable
What is Shot noise? What does it depend on? Can it be avoided? - ANS-noise caused
by variations in the movement speed of electrons
Depends on current
Unavoidable
Describe the format of a Gantt chart (answer is a picture) - ANS-
Describe the format of a Work Breakdown structure/Precedence network - ANS-Quizlet
doesn't have a picture for this, so just have to look it up
(WBS's and Precedence networks are actually different, but the slides treated them as
the same thing)
What are the steps for making a "forward pass" through a precedence network? -
ANS-1. Write a 0 for ES and EF on the start node, then move to the right to the next
node(s)
2. For each node, find the largest EF time of the node(s) that feed into it, enter that as
ES time
3. For each node, add the duration to the ES time to get the EF time
4. For the End node, write the same number for the ES and EF
How do you find the project's minimum duration? - ANS-Do a forward pass through the
precedence network, then the min. duration will be the ES/EF of the end node
What are the steps for making a "backward pass" through a precedence network? -
ANS-1. On the end node, copy ES/EF time to LS/LF, then move left to the next node(s)
2. For each node, find the smallest LS time of its successors, write that as its LF time
3. For each node, subtract the activity duration from the LF time, write that as the LS
time
4. On the start node, write the same number for LS and LF. This should be zero
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