### Mechanical Measurements 2nd Edition by S.P. Venkateshan

#### Preface to the second edition

The second edition of the book has been thoroughly revised and all errors that have come to my notice have been corrected. Additions have been made at various places in the book. Notable additions are in the statistical analysis of measured data in Module I. Important questions regarding normality of deviations and identification of outliers have been discussed in great detail. These should interest the advanced reader who is looking for an understanding of these issues. Thermistors have been described in greater detail in Chpater 4. Also, the line reversal technique of measuring gas temperature has been described in greater detail. Theory of the integrating sphere has been discussed in detail in Chapter 12. Module V has been augmented with more examples from laboratory practice. Exercises are now positioned at the end of each module. Many new exercise problems have been added in this edition.

The modules have been rearranged with the number of chapters going up by one to a total of sixteen chapters in this edition. Many references are indicated as footnotes in the text apart from the bibliography and the list of references given in the Appendix. All illustrations have been redrawn for this edition using ‘tikz’ - a program environment compatible with ‘latex’. All graphs have been replotted for this edition using QtiPlot. In general these were done to improve the quality of the illustrations as also to bring uniformity in the format.

It is hoped that the second edition will be received with the same enthusi asm as the original edition by the student community. The text contains many worked examples that will help the reader understand the basic principles involved. I have provided a large number of problems, at the end of the book, arranged module wise. These problems have appeared in the examination papers that I have set for students in my classes over the years. The problems highlight the kind of numerics that are involved in practical situations. Even though the text is intended to be an undergraduate text book it should interest practicing engineers or any one who may need to perform measurements as a part of his professional activity! I place the book in the hands of the interested reader in the hope that he will find it interesting and worth his while. The reader should not be content with a study of the book that contains a large number of line drawings that represent instruments. He should spend time in the laboratory and learn how to make measurements in the real world full of hard ware.

#### Contents

**I Measurements, Error Analysis and Design of Experiments**

2 Regression analysis

3 Design of experiments

**II Measurements of Temperature, Heat Flux and Heat Transfer Coefficient**

4 Measurements of Temperature

5 Systematic errors in temperature measurement

6 Heat flux and Heat Transfer Coefficient

III Measurement of Pressure, Fluid velocity, Volume flow rate, Stagnation and Bulk mean temperatures

8 Measurement of Fluid Velocity

9 Volume flow rate

10 Stagnation and Bulk mean temperature

**IV Thermo-physical properties, Radiation properties of surfaces, Gas concentration, Force/Acceleration,torque and power**

11 Measurement of thermo-physical properties

12 Radiation properties of surfaces

13 Gas concentration

14 Force/Acceleration, torque and power

**V Data Manipulation and Examples from laboratory practice**

15 Data Manipulation

16 Examples from laboratory practice

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