experimental stress analysis important questions

8/13/2019 experimental stress analysis important questions

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UNIT - I QUESTION BANK

1. Define Precision of a Measuring instrument.

2. Define Accuracy.

3. Define Sensitivity.

4. Define Gauge factor.

5. State the difference between Accuracy and Precision.

6. Define Range.

1. Explain in detail the Principles of Measurements.

2. Write short notes on:

(a) Accuracy (4)

(b) Sensitivity (4)

(c) Range (4)

UNIT - II

1. Define a strain gauge.2. List the various types of strain gauges.

3. What are the basic characteristics of a strain gauge?

4. What are the various factors to be considered before selecting a gauge?

5. Define strain sensitivity of a gauge.

6. List the various limitations of a mechanical strain gauge.

7. Write the advantages of Foil type strain gauge over Wire type strain gauge?

8. What is a Strain rosette?

9. What are the advantages of an acoustical gauge?

10. What are the limitations of an optical gauge?

1. Write a short account of the various types of strain gauges. Give their special

advantages and limitations.


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UNIT - IV

1. What is the photoelastic effect?

2. Differentiate between ordinary and monochromatic light.

3. Define Stress optic law.

4. Define isoclinics and isochromatics.

5. What do you mean by compensation?

6. What is a stress trajectory?

7. Define sensitivity index and figure of merit of a photoelastic material.

8. What is the necessity of calibration of a photoelastic material?

9. Why Tardy method of compensation is preferred over all other methods?

10. Who discovered the photoelastic effect and when?

1. Sketch a circular polariscope. Explain the effects of a stressed model and the fringes

obtained in it

2. Sketch a plain polariscope. Explain the effects of a stressed model and the fringes

obtained in it.

3. Describe in detail how fringe sharpening is obtained using partial mirrors.

4. Explain any two compensation techniques used in photo elasticity.

5. What are the important properties of an ideal photoelastic material?Discuss the important photoelastic materials.

6. Explain the Tardys compensation method in detail. Why this method ispreferred over other methods?

UNIT - V

1. List down various NDT Techniques used to detect the damages in the materials.

2. State the importance of NDT methods in Aviation Industry.

3. What are the advantages of Ultrasonic method over X-ray method?

4. What are the advantages in magnetic particle inspection method?

5. What is the necessity of the refrigeration technique?

6. What is the effect of dye-etchant on strain-sensitivity of the coating?


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7. What is a grating?

8. Differentiate between a model and master grating.

9. Define Holography.

10. What is Thermograph?

1. State the uses and advantages of Non-Destructive Testing procedures. Explain in detail

any one of the NDT procedure for evaluating a given specimen.

2. Write short notes on the following:

a. Eddy Current Testing

b. Radiography

3. Explain the process of Magnetic particle inspection with a neat sketch.4. With a suitable sketch explain the process of Fluorescent penetrant technique.

5. Explain the brittle coating method in brief. What are the advantages and limitations of

this method?

6. Briefly explain the following which are used in the experimental analysis:

a. Fibre optic sensors

b. Thermography

c. C Scan

experimental stress analysis important questions

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