[prince karak]

Sathyabama Institute of Science and Technology B.E. - Mechanical Engineering SMEA1301 Engineering Metrology Syllabus

SATHYABAMA INSTITUTE OF SCIENCE AND TECHNOLOGY SCHOOL OF MECHANICAL ENGINEERING

SMEA1301 ENGINEERING METROLOGY
L T P Credits Total Marks
3 0 0 3 100

UNIT 1 INTRODUCTION TO METROLOGY 9 Hrs.
Accuracy, precision, resolution and sensitivity of measuring instruments, classification of errors in measurements, alignment
errors, evaluation and propagation of errors , Limits, fits and tolerances. Definition of tolerance, Specification in assembly,
Principle of interchangeability and selective assembly, limits of size, Indian standards, concept of limits of size and
tolerances, definition of fits, hole basis system, shaft basis system, types of fits and their designation, geometric tolerance,
position-tolerances. Classification of gauges, brief concept of design of gauges (Taylor’s principles), Types of gauges-plain
plug gauge, ring gauge, snap gauge, limit gauge and gauge materials, Terminologies in Measurement - Care of Measuring
Instruments- Reliability.

UNIT 2 LINEAR AND ANGULAR MEASUREMENTS 9 Hrs.
Linear Measuring Instruments – Evolution – Types – gauge design – Comparators: Functional requirements, classification,
mechanical, sigma comparators, dial indicator, electrical principles, LVDT, Pneumatic- back pressure gauges, solex
comparators and optical comparators- Zeiss ultra-optimeter, slip gauges – Types –Indian standards on slip gauge, method
of selection of slip gauge, stack of slip gauge, adjustable slip gauge, wringing of slip gauge, care of slip gauge, slip gauge
accessories, Angular measuring instruments – Sine bar, angle gauges, autocollimator, angle dekkor, tool maker’s
microscope, Bevel protractor, clinometers, spirit levels– Alignment telescope – Applications.

UNIT 3 MEASUREMENTS OF POWER, PRESSURE, TEMPERATURE AND FLOW 9 Hrs.
Power, Force and Torque – mechanical, hydraulic, pneumatic and electrical type – Pressure – low pressure measurement
using Mc Leod gauge, thermal conductivity gauge and ionization gauges – high pressure measurement using diaphragm
gauges and bulk modulus pressure gauge. Temperature – thermo couple, RTD, thermistor-electrical resistance
thermometer- pyrometers. Flow – Turbine type flow meter, magnetic flow meter, ultra-sonic flow meter, thermal flow meter
and hot wire anemometer, Venturimeter, Orifice meter, Rotameter, Pitot tube – Temperature: bimetallic strip.

UNIT 4 FORM MEASUREMENTS 9 Hrs.
Standard screw thread profiles, Terminology of screw threads, Measurement of major, minor and effective diameter by 2
wire, 3 wire method and best wire size, Screw thread gauges, Tool maker’s microscope. Gear tooth profile measurement,
Gear tooth terminology, tooth thickness measurement using constant chord method, addendum comparator method and
base tangent method, measurement of pitch, concentricity, run out, and involute profile. Gear roll tester for composite error.
Form measurement-Straightness - Flatness, Roundness, Surface finish measurement.

UNIT 5 ADVANCES IN METROLOGY 9 Hrs.
Basic concept of lasers - Advantages of lasers – Interferometry – laser interferometers – types – DC and AC Lasers
interferometer- Applications – Straightness – Alignment. Computer Aided Inspection-Basic concept of Co-ordinate
Measuring Machines(CMM) – Types of CMM – Constructional features – Probes –working principle, applications, alignment
and errors; Machine Vision, elements of vision system, applications in manufacturing.
Max. 45 Hrs.

COURSE OUTCOMES
On completion of the course, student will be able to
CO1 - Understand the terminologies of metrological measurements, methods of measurements and standards of
measurements.
CO2 - Understand the principles of fits and tolerance, limit gauges and their designs.
CO3 - Recognize the working of slip gauges, angle gauges, autocollimators, LVDT, comparators and tool makers
microscope.
CO4 - Recognize the functioning of power, pressure, temperature and flow measuring devices.
CO5 - Recognize the measurements of Screw thread, Gear tooth profiles, flatness, roundness and surface finish
measurements.
CO6 - Understand the concepts of advances in metrology using Laser interferometry, CMM and machine vision.

TEXT / REFERENCE BOOKS
1. Connie L Dotson, “Fundamentals of Dimensional Metrology”, Thomson Delmer Learning, 2006.
2. Beckwith T.G. and Marangoni, “Mechanical Measurements”, Addison Wesley, 2000.
3. Gupta I C, “Text Book of Engineering Metrology”, Dhanpat Rai Publishers, 2003.
4. Jain R.K., “Engineering Metrology”, Khanna Publishers, 1994.
5. Sirohi, “Mechanical Measurements”, New Age Publications, 2013.
6. Gaylor & Shotbolt, “Engineering Metrology”, Mc Donald & Co Publications, 2005.
7. Hume K.J., “Engineering Metrology”, ELBS, 1970.

END SEMESTER EXAMINATION QUESTION PAPER PATTERN
Max. Marks: 100 Exam Duration: 3 Hrs.
PART A: 10 Questions of 2 marks each - No choice 20 Marks
PART B: 2 Questions from each unit of internal choice each carrying 16 marks 80 Marks