Roll No. | | Total No. of Pages : 02
Total No. of Questions : 18
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B.Tech. (ME) (2012 Onwards) (Sem. - 5)MECHANICAL MEASUREMENT AND METROLOGY
Subject Code : BTME-503
M.Code : 70604
Time : 3 Hrs. Max. Marks : 60
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INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
SECTION-A
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Answer briefly :
- Draw the various blocks of a generalized measurement system.
- Explain in brief ‘Zero Order Systems’.
- What is wringing? Give the procedure for wringing of slip gauges.
- A Wheatstone bridge requires a change of 7 O in the unknown arm of the bridge to produce a change in deflection of 3 mm of the galvanometer. Determine the sensitivity.
- Explain why a monochromatic light is used for interferometry work and not the white light?
- Explain why it is not preferred to use sine bar for measuring angles more than 45°?
- State the working principle of dead weight gauge tester.
- Give the working principle of a stroboscope.
- Draw a schematic view of radiation pyrometer.
- Draw a neat sketch of LVDT.
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SECTION-B
- Differentiate between primary, secondary and tertiary types of measurements. Cite suitable examples for each one.
- Derive the expression for time response for a second order underdamped system when subjected to a unit step input. Sketch the response.
- What is sine bar? How it is used for angle measurement?
- A parallel plate capacitive transducer uses plates of area 500 mm² which are separated by a distance of 0.2 mm. Calculate the value of capacitance when the dielectric is air having a permittivity of 8.85 x 10?¹² F/m.
- Explain construction and working of liquid-in-glass thermometers.
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SECTION-C
- In a test, temperature is measured 100 times with variations in apparatus and procedures. After applying the corrections, the results are :
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| Temperature °C | 397 | 398 | 399 | 400 | 401 | 402 | 403 | 404 | 405 |
|---|---|---|---|---|---|---|---|---|---|
| Frequency of occurence | 1 | 3 | 12 | 23 | 37 | 16 | 4 | 2 | 2 |
Calculate :
- The mean
- Mean deviation
- Standard deviation
- The probable error of one reading
- The probable error of mean
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- Describe the construction, working and theory of McLeod gauge for measurement of vacuum. List its advantages and disadvantages.
- What are dynamometers? How are they classified? Explain the difference between absorption, transmission and driving dynamometers.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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This download link is referred from the post: PTU B.Tech Question Papers 2020 December (All Branches)
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