STUPIDSID
Please log in to continue.
Please log in to continue.
Please log in to continue.
Please log in to continue.
Please log in to continue.
Please log in to continue.
Please log in to continue.
1 (a)
Sketch and explain the following :
Imperial standard yard and international prototype meter.
Imperial standard yard and international prototype meter.
8 M
1 (b)
Compare line and end standards of measurements.
6 M
1 (c)
Three 100mm end bars are measured on a level comparator by first wringing them together and comparing with a 300 mm bar. The 300 mm bar has a known error of +40 ?m and the three bars together measure 64 ?m less than the 300 mm bar. Bar A is 18 ?m longer than bar B and 23 ?m longer than bar C. FInd the actual length of each bar.
6 M
2 (a)
Explain
(i) Interchangeable manufacturing.
(ii) Selective assembly of machine parts.
(i) Interchangeable manufacturing.
(ii) Selective assembly of machine parts.
5 M
2 (b)
Design a general type GO and No GO guages for a hole and shaft pair designated as 450 H8e9 with following details:
(i) 450 mm dia lies in 400-500 mm step.
(ii) The standard tolerance unit i is given by the formula \[ i=0.45 \ \sqrt[3]{D}+0.001D \] microns (D is in mm).
(iii) IT8=25i, IT9=40i
(iv) The fundamental deviation for an e type shaft=-11D0.41 microns.
Sketch the layout indicating the various tolerance on both holes and shaft and their respective guages.
(i) 450 mm dia lies in 400-500 mm step.
(ii) The standard tolerance unit i is given by the formula \[ i=0.45 \ \sqrt[3]{D}+0.001D \] microns (D is in mm).
(iii) IT8=25i, IT9=40i
(iv) The fundamental deviation for an e type shaft=-11D0.41 microns.
Sketch the layout indicating the various tolerance on both holes and shaft and their respective guages.
15 M
3 (a)
What is a comparator, what are the needs and characteristics of comparator?
6 M
3 (b)
Explain with a neat sketch the working principle of Johansson Mikrokator.
10 M
3 (c)
List the advantages and disadvantages of mechanical comparators.
4 M
4 (a)
With a neat sketch, explain the working principle of an auto collimator.
6 M
4 (b)
Mention the nominal angles of a standard set of angle guages and indicate how the following angles can be built using angle guages (i) 33°16'12"; (ii)57°34'9"
6 M
4 (c)
Define "effective diameter" and "best size wire". Derive an expression to determine the best size wire diameter.
8 M
5 (a)
Define measurement with the aid of a block diagram, explain the three stages of a generalized measurement system with suitable example.
10 M
5 (b)
Define error in measurement. Give classification of errors.
4 M
5 (c)
Define the following :
(i) Accuracy
(ii) Precision
(iii) Sensitivity.
(i) Accuracy
(ii) Precision
(iii) Sensitivity.
6 M
6 (a)
What is a transducer? Differentiate between
(i) Primary and secondary transducers
(ii) Active and passive transducers.
(i) Primary and secondary transducers
(ii) Active and passive transducers.
6 M
6 (b)
With a neat block diagram, explain the working principle of CRO
10 M
6 (c)
State the advantages of electrical signal conditioning elements
4 M
7 (a)
Explain with a neat sketch the working principle of McLeod guage.
8 M
7 (b)
Explai with a neat sketch the working principle of a Pirani guage.
6 M
7 (c)
Explain with suitable diagram the working of hydraulic dynamometer.
6 M
8 (a)
What is a thermo couple? State the laws of thermocouple and explain the same.
6 M
8 (b)
Derive an expression for guage factor of a strain guage. Why guage factor is at least two for most of the materials?
6 M
8 (c)
Explain the working principle of optical pyrometer, with a neat sketch.
8 M
More question papers from Mechanical Measurement and Metrology