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•ã¨ãã - 049 1 P.T.O
Metrology & Quality Control (126114 / 216114)
P. Pages : 2Time : Three Hours Max. Marks : 80
_________________________________________________________________
Instructions to Candidates :1. Do not write anything on question
paper except Seat No.2. Graph or diagram should be drawn with the
black ink pen being
used for writing paper or black HB pencil.3. Students should
note, no supplement will be provided.4. All questions are
compulsory & attempt any two bits out of a, b,
c of questions.
5. Neat diagrams must be drawn wherever necessary.6. Assume
suitable additional data, if required. Use non-
programmable calculator.
1. Solve any two. 8
a) Define :i) Straightness ii) Flatnessiii) Squarness iv)
Roundness
b) Difference between.i) Accuracy and precision.ii) Line
standard and end standard.
8
c) What are various linear measuring devices?Explain any one in
brief.
8
2. Solve any two.
a) Describe in brief construction and working of amechanical
comparator.
8
b) Design a workshop type of Go and No-go ring gauge for
inspection of 30F8 shaft. Use the following data
withnotifications.
i) I (Microns) = D001.0D45.0 3
( D is in mm).
ii) The fundamental deviation of shaft F = -5.5D0.41.iii) The
value of tolerance for grade IT8 is 25i.iv) 30 mm falls in the
diam. Step of 18 and 30.
8
*5785* Seat Number
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c) Write short note on :i) Angle dekkor. ii) Angle Gauges.
8
3. Solve any two. 8
a) What is best size wire? Derive an expression for the best
size wire.
b) Calculate the diam. of the base tangent length over 5
teeth,when gear under inspection has following specifications,Teeth
No. = 30Module = 4Pressure Angle = 20º.
8
c) Explain with neat sketch computer controlled
co-ordinatemeasuring machine (CMM). Give it's advantages.
8
4. Solve any two.
a) Explain seven quality controls tools. 8
b) Write short notes on :i) TQM ii) Zero defect concept.
8
c) "Quality function deployment" (QFD) is a useful for a
designer.Comment with an example.
8
5. Solve any two.
a) Explain the concept of six-sigma. 8
b) The following are the X and R values of 4 subgroups of5
readings.
8.0,9.0,3.1,1.1R
5.10,8.10,1.12,2.10X
The specification limits for the components are 2.07.10
.
Establish the control limits for X and R chart. Will the
products able tomeet it's specification given,
i) A2 (Factor for X chart) = 0.58ii) D4 (Factor
for R chart) = 2.11iii) D3 (Factor for R chart) = 0.00.
8
c) Write a short notes on :i) Sampling plan.ii) Operating
characteristic (OC) Curve.
8
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