7/25/2019 16 Marks Metrology and Measurments

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METROLOGY AND MEASURMENTS

16 MARK QUESTIONSUnit 1

1. Explain the need for measurement

2. Differentiate between precision and accuracy with suitable example.

3. Write short notes on i)repeatability ii)Accuracy iii)Sensitiity i)!ncertainty

". Explain in detail the basic element of the accuracy of measurin# systems.

$. State the re%uirements for an instrument to measure accurately.

&. What are the re%uirements of an inspection tool'

(. Draw the bloc dia#ram of a #enerali*ed measurement system and explain the arious sta#es with an

example.

+. What are the arious possible sources of errors in measurements' What do you understand by systematic

error and random errors'

,. Explain in detail arious types of errors that may arise in en#ineerin# measurements.

1-. Discuss on #eometric and dimensional tolerancein# with suitable examples.

Unit 2

1. Explain with a neat setch how a ernier caliper is used for linear measurement.

2. Setch and explain the function of optical protractor with ernier.3. Explain with a neat setch the construction and of worin# compactors.

". Describe the precautionary measures to be taen at arious sta#es of usin# slip #au#es.

$. With a neat setch explain the construction and worin# principle of Solex pneumatic comparator.

&. Explain mathematically why error in sine bar increases when the an#le bein# measured exceeds "$/.

(. Describe the flatness testin# method by usin# 0nterferometer applied.

+. Explain the worin# method of mechanical optical comparators with setch.

,. Explain with a neat setch the construction and worin# of a ool aer4s icroscope.

1-. What is the principle of An#le deor' 5ow is it used for the measurement of an#les'

Unit 3

1. Explain the construction and worin# principle of laser interferometer with neat dia#ram'

2. 5ow surface finish is measured usin# 6ASE7. 5ow the an#le is measured usin# a laser interferometer'

3. Discuss the steps inoled in computin# flatness of surface plate.

". 5ow are 8s classified with respect to constructional features' Setch and state their main applications

merits and demerits

$. 9riefly explain about machine ision.

7/25/2019 16 Marks Metrology and Measurments

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Unit 4

1. Explain with a neat setch the worin# of aylsurf instrument for surface finish measurement. What is the

symbol for fully definin# surface rou#hness and explain each term'

2. Describe in detail the method of checin# roundness by usin# 7oundness easurin# achine. State its

adanta#es.

3. Setch and describe the optical system of a laser interferometer.

". Define explain the worin# principle of omlinson surface meter with a neat setch. Define strai#htness.

Describe any one method of measurin# strai#htness of a surface.

$. Explain how the strai#htness error of a 6athe bed is checed usin# a Auto:collimator

&. With neat setches explain the si#nificance of some important parameters used for measurin# surface

rou#hness. Why so many parameters are needed'

(. 5ow surface finish is measured usin# 6ASE7. 5ow the an#le is measured usin# a laser interferometer'

+. Discuss the steps inoled in computin# flatness of surface plate.

,. 5ow are 8s classified with respect to constructional features' Setch and state their main applications

merits and demerits

Unit 5

1. 9riefly explain arious methods of measurin# tor%ue

2. 9riefly explain arious methods of measurin# temperature

3. 9riefly explain arious methods of measurin# flow

". 9riefly explain arious methods of measurin# power

$. 9riefly explain arious methods of measurin# force

&. Explain worin# of ;ressure thermometer and resistance thermometer

(. Explain the construction and worin# of enturimeter and 7otameter

+. Explain the construction and worin# of 9imetallic strip and hermocouple

,. Discuss the adanta#es and disadanta#es of a);itot tube b) 7otameter c) 5ydraulic force meter.

1-. Explain with neat setch the construction and worin# of a c6eod