ME 370
Practice Exam 1
ME 370: Engineering Measurements and Instrumentation
Fall 2012
Practice Exam 1
Name:_
Section:_
NOTE: This is a practice exam, it, by no means, should be identical to the real exam. It is solely used for
practice purpose, provides s
H omework P roblem 4 .10
P roblem O bjective:
S tatement: T he pressure t ap on the surface of a heat exchanger tube is connected
via flexible tubing t o a pressure transducer. B oth t he t ubing and t he t ransducer
behave as second-order systems. T he n
H omework P roblem 3 .3
P roblem O bjective: To understand t he uSe of an amplifier t o reduce t he uncertainty in A ID conversion.
S tatement: T he voltage from a 0 t o 5 k g s train gage balance scale has a corresponding o utput voltage range of 0 t o 3
ME 370
Fall 2014
Homework Assignment #6 Solution
Due: Wednesday, November 05, 12 pm @2128 Coover
Print your name and NetID legibly. Follow the guideline and format given in the syllabus. Put all
units. Staple multiple pages.
1. 1st Order System Sine Input
HW4
ME 370 Engineering Measurements and Instrumentation
Due Wednesday, February 26, 5:00 pm
Problem 1: Find the continuous-time Fourier Transform for x t exp t and simplify it so that there
are no imaginary numbers in your final answer. For the online HW,
ME 370
Practice Exam 2
Fall 2010
ME 370: Engineering Measurements and Instrumentation
Fall 2010
Practice Exam 2
Name:_
Section:_
NOTE: This is a practice exam, it, by no means, should be identical to the real exam. It is solely used for
practice purpose,
Homework Problem 7.4
Problem Objective: Use of design-stage uncertainty analysis to determine the best experimental
method, and then to compare its predicted uncertainty to that attained by multiplemeasurement uncertainty analysis.
Statement: A new compos
ME 370
Fall 2014
Quiz #3
Wednesday, 10-01-2014
Name:
NetID:
1. Filter: The function of the filter shown below is to:
A.
B.
C.
D.
Reduce DC amplitude
Reduce AC amplitude
Both A and B
None of above
2. Analog-to-digital converter: The resolution of a 12-bit,
ME 370
Fall 2014
Quiz #2
Wednesday, 09-24-2014
Name:
NetID:
1. Sampling: Sample 256 points of signal y(t) = 5 sin(2t) using the sampling time interval t = 0.3s. A
filter is applied to eliminate all frequency content above the Nyquist frequency. Which of t
Lecture 10
ME 370
Engineering Measurements
and Instrumenta6on
Lecture 10
Filters
Strain-overview
ME 370
Mechanical Engineering
IOWA STATE UNIVERSITY
Lecture 10
Key Points of Previous Lecture
Instrumenta6on am
ME 370
Fall 2014
Name_
NetID_
ME 370 Exam No. 1 Practice
Monday October 06, 2014
NOTE: This is an open book and open notes exam. Do your work on the page of the problem and if necessary
on the preceding blank page. It is mandatory that proper units be inc
2. Fast Fourier Transforms
To explain a Fast Fourier Transform, a Fourier Transform must first be understood. In life we have lots of
signals. There are audio signals, internet connection, TV cable, nerve synapses, and more. The way we
interact with signa
ME 370
Fall 2014
Quiz #4 Solution
Wednesday, 10-29-2014
Name:
NetID:
1. Uncertainty: (5 points) A temperature measurement system with the following accuracies:
Zero-order uncertainty
(resolution u0)
0.5%
Temperature transducer
2%
Instrumentation amplifier
ME 370
Engineering Measurements
and Instrumenta6on
Lecture 17
Lecture 17
2nd Order System Response
Vibrometers/Accelerometers
Mechanical Engineering
IOWA STATE UNIVERSITY
Key Points of Last Lecture
Lecture 17
ME 370
Fall 2014
Quiz #5 Solution
Wednesday, 11-05-2014
Name:
NetID:
1. 1st order system: (2 points) Does a smaller diameter thermocouple or a larger diameter thermocouple
have the large time constant?
Larger diameter thermocouple has the large time const
ME 370
Fall 2014
Name_
NetID_
ME 370 Exam No. 1 Practice Solution
Monday October 06, 2014
NOTE: This is an open book and open notes exam. Do your work on the page of the problem and if necessary
on the preceding blank page. It is mandatory that proper uni
PROBLEM 4.1
KNOWN: N > 1000; x = 9.2 units ; Sx = 1.1 units
FIND: Range of x in which 50% of all measurements should fall.
ASSUMPTIONS: Measurand follows a normal density function
Data set sufficiently large such that x x and Sx
SOLUTION
By assuming that
Learn by writing methods are valuable for developing understanding of a new concept.
Questions 5.1 5.4 provide some topics for Learn to Write exercises.
PROBLEM 5.1
SOLUTION
Systematic error is a constant error that shifts all measured values of a variabl
PROBLEM 3.1
KNOWN:
K = 2 V/kg
F(t) = constant = A
Possible range of A: 1 kg to 10 kg
FIND:
y(t)
SOLUTION
We will model the input as a static value and interpret the static output that results. To do
this, this system is modeled as a zero order equation.
y
PROBLEM 1.1
FIND: Explain the hierarchy of standards. Explain the term standard. Cite example.
SOLUTION
The term standard refers to an object or instrument, a method or a procedure that provides a
value of an acceptable accuracy for comparison.
A primary
PROBLEM 8.1
KNOWN/FIND: Define and discuss the significance of:
a) temperature scale
b) temperature standards
c) fixed points
d) interpolation
SOLUTION:
a) temperature scale - an established relationship for assigning numerical
values to measures of tempe
Lecture 19
ME 370
Engineering Measurements
and Instrumenta6on
Lecture 19
Probability and Sta6s6cs
Normal Distribu6on
Student t-Distribu6on
Mechanical Engineering
IOWA STATE UNIVERSITY
Lecture 19
Announcements
La
ME 370
Fall 2016
Homework Assignment #5
Due: Monday, xxxxxxxxxxxx, via Blackboard before 8 am on the due date (Please submit a
PDF copy of your homework)
1. Strain gauge: A metallic strain gauge has a resistance of 350 at zero strain. The strain
gauge is
ME 370
Fall 2016
Homework Assignment #6
1. Uncertainty Analysis (problem 7.2 from the text): A mechanical engineer is asked to
design a cantilever beam to support a concentrated load at its end. The beam is of circular
section and has a length, l, of 6 ft
ME 370
Fall 2016
Homework Assignment #7
1. 1st Order System Sine Input (problem 6.3 from the text): A first-order system with a time
constant equal to 10 ms is subjected to a sinusoidal forcing function with an input amplitude
equal to 8.00 V. When the in