MECHANICAL MEASUREMENT & METROLOGY PAPER

DOWNLOAD MECHANICAL ENGINEERING PREVIOUS YEARS QUESTION PAPERS B.TECH PTU THIRD YEAR

MECHANICAL MEASUREMENT & METROLOGY ME 307 (New) 5th Sem May 2k5
Max marks 60

Note: Section A is compulsory. Attempt any Four questions from Section B and any Two questions from Section C.

Section A Marks 2 each
1.
(a) Draw a neat sketch of centrifugal force tachometer.
(b) What is the significance of Response curve in temperature measurement?
(c) What is the relationship of gauge factor and Poisson’s ratio in resistance wire strain gauges?
(d) Explain line standards and end standards
(e) What is dynamic accuracy of an instrument?
(f) Write the SI units and symbols for Electric Charge, Force, Pressure and Magnetic flux.
(g) Draw sketch for ramp and sinusoidal input signal and state some examples.
(h) What is the role of probability table for a Normal Gaussian curve?
(i) Write the SI units symbols for Electric charge, force, Pressure and Magnetic flux.
(j) What do you understand by velocity and acceleration transducers?

Section B Marks 5 each

2. What are the factors involved in selection of measuring instruments?

3. The following data are expected to follow linear relationship of the form y = ax + b. Obtain the best linear relation in accordance with a least square analysis. X = 0.9, 2.3, 3.3, 4.5, 5,7, 6,7, and y = 1.1, 1.6, 2,6, 3.2, 4.0, 5.0

4. Describe the steps for proper mounting of the strain gauges.

5. Explain how the speed Is measured with stroboscope. What is the role of reference marks in measuring speed?

6. Describe the measurement circuits used for measuring change in resistance in temperature measurement.

Section C Marks 10 each

7. Explain the Dynamics response of the instrument for which the differential equation of motion is of Second order.

8. Explain construction, working, merits and demerits of ultrasonic type flow meters.

9. Explain the procedure to measure various pitch, diameters and thread angle for external and internal threads.