USN
ME31
Third Semester B. E. Degree (Autonomous) Semester End Examination, SEE, December 2013/Janu
Department of Mechanical Engineering
Mechanical Measurement & Metrology
Time: 3 Hours
Maximum Marks: 100
Instructions to students:
Answer FIVE FULL Questions.
Question No. 1, 6, 7 are COMPULSORY.
Answer ANY ONE from Question No2 and3.
Answer ANY ONE from Question No. 4 and 5.
1
a)
b)
c)
2
a)
b)
c)
What is metrology? State and explain the objectives of
metrology
Name & explain briefly the different type of fit as per
BIS and shoe them by neat schematic diagrams
What is the essential purpose of a limit system?
Explain.
6
Explain limit gauging.
What are GO & NO GO gauges? How the Taylor’s
principal is used in designing them
What are the allowances to be considered in the
manufacture of gauges explain.
4
8
8
6
8
3
4
a)
What is comparator? Give the detailed classification of 6
comparators.
b)
Describe with a neat sketch the construction &
working of LVDT
Explain with a neat sketch optical bevel protractor
) Explain with a diagram, the method to measure minor
diameter of both external & internal screw threads
What is best wire size? Derive an expression for the
same.
8
Explain the following with respect to an instrument
I. Sensitivity ii. Accuracy & Precision iii. Hysteresis
iv. Loading effect
Sketch & explain the working of a tool maker’s
microscope.
8
b)
Describe the three stages of measurement with a
suitable example.
6
c)
Explain with a sketch three coil type variable mutual
inductance transducer.
8
a)
Explain amplification of backlash & amplification of
elastic deformation.
6
b)
Explain with a neat sketch stylus type type
oscillograph.
6
c)
Explain in detail the working principal of hydraulic
dynamometer. Which is used for torque measurement?
8
a)
With a sketch explain the working & application of
Mecleod gauge.
6
b)
Explain i. Seebeck effect ii.Peltier effect iii.Thomson
6
c)
a)
b)
c)
5
6
7
a)
6
6
6
6
effect
c)
What is pyrometer? Explain the working principal of
optical pyrometer.
8