Board of Technical Examinations, Bangalore
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Course Title:
MECHANICAL MEASUREMENTS |
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Scheme (L:T:P) : 4:0:0 |
Total
Contact Hours: 52 |
Course Code: 15ME33T |
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Type of Course: Lectures,
Self Study & Quiz |
Credit :04 |
Core/
Elective: Core |
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CIE- 25 Marks SEE-
100 Marks |
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Prerequisites: Knowledge of basic
mathematics and Science. Basic Electrical and Electronics Engineering
Course Objectives:
1.
Understand the advances in technology, measurement techniques, types of
instrumentation devices, innovations, refinements.
2.
To learn various flow measurement techniques.
On successful completion of
the course, the students will be able to CO:
NOTE: The theory should be taught in such a manner that
students are able to acquire different learning out comes in cognitive,
psychomotor and affective domain to demonstrate following course outcomes.
Course Outcomes:
|
Course Outcome |
CL |
Linked
PO |
Teach ing Hrs |
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CO1 |
Know the
terms of the measurements, and Understand the principle of operation of an
instrument, Choose Suitable measuring instruments for a particular
application and Apply ethical principles while
measuring dimensions |
R/U/A |
1,2,3,10 |
12 |
|
CO2 |
Appreciate
Measurement of strain by using a basic
strain gauge and hence verify the stress induced and application of
transducers in mechanical engineering applications for sustainable development |
R/U/A |
1,2,3,10 |
10 |
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Apply the principles of instrumentation for
transducers & |
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1,2,3,6, |
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CO3 |
measurement
of non electrical
parameters like temperature, pressure, flow,
speed, force and
stress in mechanical |
R/U/A |
10 |
15 |
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engineering applications for sustainable
development |
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CO4 |
Apply the principles of
Miscellaneous measurements for humidity, density, level and blood pressure. |
U/A |
1,2,3,4,6, 10 |
06 |
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CO5 |
Apply the
principles of limits, fits, tolerance and Analyse the process alignment testing of
machine tools for manufacturing |
R/U/A |
1,2,3,4,6, |
09 |
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field. |
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10 |
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Total sessions |
52 |
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R-Remember; U-Understanding; A-Application
COURSE-PO ATTAINMENT
MATRIX
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Course |
Programme Outcomes |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
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MECHANICAL MEASUREMENTS |
3 |
3 |
3 |
1 |
- |
2 |
- |
- |
- |
3 |
Level 3- Highly Addressed, Level
2-Moderately Addressed, Level 1-Low Addressed.
Method is to relate
the level of PO with
the number of hours devoted
to the COs which address
the given PO. If
>40% of classroom sessions addressing a particular PO, it is considered that
PO is addressed at Level
3
If 25 to 40% of classroom sessions
addressing a particular PO, it is considered that PO is addressed at Level 2 If
5 to 25% of classroom sessions addressing a particular PO, it is considered that
PO is addressed at Level
1
If < 5% of classroom sessions addressing a particular PO,
it is considered that PO is considered not-addressed.
COURSE CONTENT AND BLUE PRINT OF
MARKS FOR SEE
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Unit No |
Unit Name |
Hour |
Questions to be set for SEE |
Marks weightage |
weightage (%) |
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R |
U |
A |
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1 |
Measuring instruments |
12 |
10 |
10 |
10 |
30 |
21 |
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2 |
Transducers and strain gauges |
10 |
5 |
10 |
15 |
30 |
21 |
|
3 |
Measurement of force, torque, and pressure |
06 |
05 |
05 |
10 |
20 |
14 |
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4 |
Applied mechanical measurements |
09 |
05 |
05 |
15 |
25 |
17 |
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5 |
Miscellaneous measurements |
06 |
-- |
5 |
10 |
15 |
10 |
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6 |
Limits, Fits, Tolerance &
Testing of Geometric Dimensions |
09 |
5 |
10 |
10 |
25 |
17 |
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Total |
52 |
30 |
45 |
70 |
145 |
100 |
R-Remember;
U-Understanding; A-Application
Measurement-definition-methods
of measurement-Significance-Terms applicable to measuring instruments:
Precision and Accuracy, Sensitivity and Repeatability, Range, Threshold,
Hysteresis, calibration -Errors in Measurements-Systematic and Random error.
Measuring instruments- Factors in selecting the measuring instruments -Thread
measurements:-Bench micrometer- Thread gauge micrometer- Angle measurements-
Bevel protractor, Sine Bar, Gauges: plain plug gauge, snap gauge, ring gauge-.Surface finish- Measurement
of surface finish by Talysurf surface roughness tester-Co-ordinating measuring
machine.
Transducers- concept-Characteristics,
Transducers selection factors, classifications of
Transducer,
actuating mechanisms. Voltage and current generating analog transducers-
Types-Piezoelectric transducer. Strain Measurements: Strain gauge,
Classification, Berry- type mechanical strain gauge, optical strain gauges,
mounting of strain gauges, Strain gauge rosettes-two and three elements, Gauge
factor
Force measuring devices- Spring Balance, Proving
ring, Strain guage type Load cell- Torque measuring devices- Prony brake, Hydraulic
dynamometer-.pressure
measuring devices- - Diaphragm type pressure gauge- Bourdon tube pressure
gauge- Mcloed
gauge, Construction,
working and applications.
Speed
measurement- Classification of tachometers. Working principle, construction,
working of Revolution counters and Eddy current tachometers. Displacement
measurement- Working principle, construction, working of Linear variable
Differential transformers (LVDT)-Flow measurement- Working principle,
construction, working of Rotometers-Temperature measurement. Principle,
construction, working of Resistance thermometers and Optical Pyrometer,
Thermocouples.
Humidity
measurement–construction, working of hair hygrometer-Density measurement-
Measurement of density using hydrometer, Liquid level measurement –-Measurement
of liquid level by using sight glass, Float gauge-Biomedical measurement-
construction, working of Sphygmo monometer
Concepts-
Interchangeability, Selective Assembly, Basic Definitions, Graphical
illustration of limits and Tolerances.
Fit-Classification of fits. Systems of fits-Hole Basis System and Shaft Basis
system, Systems of tolerancing-Unilateral System and Bilateral System, Machine
tools alignment testing-Checking Parallelism, Straightness, runout, alignment
testing of machine tool during erection as per IS standard procedure
®TEXT BOOKS
1. Mechanical
Engineering Measurement - Thomas Beckwith, N.Lewis Buck, Roy Marangoni - Narosa Publishing House, Bombay
REFERENCES
1.
Mechanical Engineering Measurements - A. K.
Sawhney - DhanpatRai& Sons, New Delhi.
2.
“ Metrology &
Measurement” by Anand K Bewoor,Vinay
kulakarni ,Tata McGraw hill New
delhi 2009
3.
“Principles of Engineering
metrology” by
Rega Rajendra Jaico publishers-2008
4.
“Dimensional Metrology “by Connie Dotson, DELMAR
,cenage learning,2007
5.
“Engineering Metrology” by R.K.Jain, Khanna
Publishers, 1994
LIST OF SOFTWARES/ LEARNING WEBSITES:
1.
http://en.wikipedia.org/wiki/Metrology (metrology).
2.
https://www.youtube.com/watch?v=4hlNi0jdoeQ (vernier).
3.
https://www.youtube.com/watch?v=FNdkYIVJ3Vc(vernier).
4.
https://www.youtube.com/watch?v=O8vMFFYNIfo (micrometer)
5.
https://www.youtube.com/watch?v=h98HPVuWjLA (depth micrometer)
6.
https://www.youtube.com/watch?v=SmXfGan_NXQ (telescopic gauge)
7.
http://www.authorstream.com/Presentation/007sandeepks-1858141-angular- measurment/ (angular measurement).
8.
http://askguru.net/t-Angular-Measurement-ppt
9.
https://www.youtube.com/watch?v=aBzh6i5fQ70 (surface roughness)
10.
https://www.youtube.com/watch?v=S7SXD6sKQ-I(surface roughness)
11.
https://www.youtube.com/watch?v=eVpoJzLJa0U(surface roughness)
12.
https://www.youtube.com/watch?v=3Od7vnoMwGg(surface roughness)
13.
https://www.youtube.com/watch?v=XnLiTPGE6pk (three wire thread measurement)
14.
https://www.youtube.com/watch?v=Gdvtw0pTAOs (thread pitch).
15.
https://www.youtube.com/watch?v=qMgXGedDffw (dial indicator)
16.
http://www.authorstream.com/Presentation/donzvasanth-1501139-unit-2-linear- angular-measurement/
17.
http://en.wikipedia.org/wiki/List_of_gear_nomenclature#Addendum (gear nomenclature).
18.
https://www.google.co.in/search?q=gear+tooth+vernier+caliper&tbm=isch&tbo=u& source=univ&sa=X&ei=MIuEUsqSOsiKrQeywIFQ&ved=0CCgQsAQ&biw=1600&
bih=804 (gear tooth vernier).
19.
http://www.youtube.com/watch?v=lc4dsNvm2Ks (principle of mech. meas).
20.
http://www.youtube.com/watch?v=nv3GuJArjNU (Transducers).
21.
http://www.youtube.com/watch?v=iMIzApq1CQ0 (pressure measurement).
22.
http://www.youtube.com/watch?v=JKuoQ5FV2c8 (temperature meas.).
23.
http://www.youtube.com/watch?v=GNOI_7ftbQ0(temperature
meas.) .
24.
http://www.youtube.com/watch?v=7xUdPVpafyI (flow measurement).
25.
http://www.ignou.ac.in/upload/Unit-4-62.pdf (limit gauges).
26.
http://www.scribd.com/doc/55242715/8/Types-of-limit-gauges
27.
http://www.youtube.com/watch?v=v25PCV_IJCw (sensors)
28.
http://www.youtube.com/watch?v=QItuf6lNvmI(sensors)
29.
http://www.youtube.com/watch?v=pOvTyvBqzgM (displacement sensors)
30.
http://www.youtube.com/watch?v=inLkCOwVgyM (force sensors)
31.
http://www.youtube.com/watch?v=jxv0ITAr74A(force sensors)
32.
http://www.youtube.com/watch?v=0MP_9n08urA(force sensors)
33.
http://www.youtube.com/watch?v=zAddvPHfKnw(force sensors)
34.
http://www.youtube.com/watch?v=_fQSMVf3hdM (calibration).
35.
http://www.youtube.com/watch?v=HwSxBRaxn_4(calibration).
36.
http://www.youtube.com/watch?v=ZymDMUuVuyY (geometrical Tol.)
37.
http://www.gobookee.org/measurement-of-geometric-tolerances-in-manufacturing/
38.
http://www.me.metu.edu.tr/courses/me410/exp1/410exp1theory.pdf
39.
http://www.youtube.com/watch?v=5eaSkU6Ecik (flatness measurement)
40.
http://www.youtube.com/watch?v=1tBnpzyhVXU (measuring straightness)
41.
http://www.youtube.com/watch?v=1JNCe9fwRUw (measuring perpendicularity)
42.
http://www.youtube.com/watch?v=eJ8a0k8kQIE( Roundness and cylindricity)
Course Delivery:
å
The course will be delivered through lectures and Power point
presentations/ Video
å
Teachers can prepare or download ppt of different
topic’s measuring instruments usage in mechanical
engineering application, can prepare alternative slides.
SUGGESTED LIST OF
STUDENT ACTIVITYS
Note: the following
activities or similar activities for assessing CIE (IA) for 5 marks (Any one)
1.
Each student should submit any one of the following type activity or
any other similar activity related to the course and before take up get it
approved from concerned Teacher and HOD.
2.
Each student should conduct different activity and no repeating should occur
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1 |
Each
student will select and bring at least one mechanical component. Sketch each
component. Sketch and label main
parts of instruments to be used. Calculate least count of the instrument/s to be used.
Measure
and
record
applicable
dimensions
of
each |
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component using suitable instrument |
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2 |
Sketch the part and setup, list the instruments used, list the steps
followed and record the observations for checking straightness |
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3 |
Select appropriate limit gauge for given dimension/part and check the
dimension with gauge. |
å MODEL OF RUBRICS /CRITERIA FOR ASSESSING STUDENT
ACTIVITY RUBRICS MODEL
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RUBRICS FOR ACTIVITY( 5
Marks) |
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Dimension |
Unsatisfactory |
Developing |
Satisfactory |
Good |
Exemplary |
Student Score |
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1 |
2 |
3 |
4 |
5 |
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Collection of data |
Does not collect any information relating to the topic |
Collects very limited information; some relate to the topic |
Collect
much information; but very limited relate to the topic |
Collects some basic information; most refer to the topic |
Collects a great deal of information; all refer to the topic |
Ex:
4 |
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Fulfill
team’s roles & duties |
Does not perform any duties assigned to the team role |
Performs very little duties but unreliable. |
Performs
very little duties |
Performs nearly all duties |
Performs all duties of assigned team roles |
5 |
|
Shares work
equally |
Always
relies on others to do the work |
Rarely does the assigned work; often needs reminding |
Usually does the assigned work; rarely needs reminding |
Normally
does the assigned work |
Always does the assigned work without having to be
reminded. |
3 |
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Listen to other
Team mates |
Is
always talking; never allows anyone else to speak |
Usually does most of the talking; rarely allows
others to speak |
Talks good; but never show interest in listening
others |
Listens,
but sometimes talk too much |
Listens
and speaks a fair amount |
2 |
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Average / Total
marks=(4+5+3+2)/4=14/4=3.5=4 |
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Note: This is only an example.
Appropriate rubrics/criteria may be devised by the concerned faculty (Course
Coordinator) for assessing the given activity.
Course Assessment and
Evaluation Scheme:
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What |
To who m |
When/Where (Frequency the course) |
in |
Max Mark s |
Evidence collected |
Course
outcomes |
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Direct
Assessment |
CIE |
IA |
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Three IA
tests (Average of three tests will be computed) |
20 |
Blue books |
1,2,3,4,5 |
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Student Activities |
05 |
activities sheets |
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SE E |
End Exam |
End course |
of |
the |
100 |
Answer scripts at BTE |
1,2,3,4,5 |
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Indirect Assessment |
Student Feedback on course |
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Middle course |
of |
the |
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Feedback
forms |
1
& 2,3 Delivery of course |
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End Course Survey |
of |
End course |
of |
the |
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Questionnaires |
1,2,3,4,5 Effectiveness of Delivery of instructions & Assessment
Methods |
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Note: I.A. test shall be conducted
for 20 marks. Average marks of three tests shall be rounded off to the
next higher digit.
Note to IA verifier: The
following documents to be verified by CIE verifier at the end of semester
1. Blue books ( 20 marks)
2. Student suggested activities
report for 5 marks
3.
Student feedback on course regarding Effectiveness of Delivery of
instructions & Assessment Methods.
