Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) Mechanical Engineering 2020 December 5th Sem 70604 Mechanical Measurement And Metrology Previous Question Paper
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (ME) (2012 Onwards) (Sem.?5)
MECHANICAL MEASUREMENT AND METROLOGY
Subject Code : BTME-503
M.Code : 70604
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1.
Draw the various blocks of a generalized measurement system.
2.
Explain in brief `Zero Order Systems'.
3.
What is wringing. Give the procedure for wringing of slip gauges.
4.
A Wheatstone bridge requires a change of 7 in the unknown arm of the bridge to produce
a change in deflection of 3 mm of the galvanometer. Determine the sensitivity.
5.
Explain why a monochromatic light is used for interferometry work and not the white
light?
6.
Explain why it is not preferred to use sine bar for measuring angles more than 45??
7.
State the working principle of dead weight gauge tester.
8.
Give the working principle of a stroboscope.
9.
Draw a schematic view of radiation pyrometer.
10. Draw a neat sketch of LVDT.
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SECTION-B
11. Differentiate between primary, secondary and tertiary types of measurements. Cite suitable
examples for each one.
12. Derive the expression for time response for a second order underdamped system when
subjected to a unit step input. Sketch the response.
13. What is sine bar? How it is used for angle measurement?
14. 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 ? 10-12 F/m.
15. Explain construction and working of liquid-in-glass thermometers.
SECTION-C
16. In a test, temperature is measured 100 times with variations in apparatus and procedures.
After applying the corrections, the results are :
Temperature ?C
397 398 399 400 401 402 403 404 405
Frequency of occurence
1
3
12
23
37
16
4
2
2
Calculate :
a) The mean
b) Mean deviation
c) Standard deviation
d) The probable error of one reading
e) The probable error of mean
17. Describe the construction, working and theory of McLeod gauge for measurement of
vacuum. List its advantages and disadvantages.
18. 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 post was last modified on 13 February 2021