Amiraj College of Engineering & Technology

Question Bank

Subject: Mechanical Measurement and Metrology Branch: 4th Mechanical

Chapter: 1 Introduction to Metrology1 Describe with sketch International Prototype Meter (Material Length Standard) stating material

composition and limitations. (June 2010)

07

2 Describe the following types of errors and state how they can be taken care of.

(i) Environmental error (ii) Error due to vibration. (Dec 2010)

03

3 State and explain five basic elements of measuring system. (Dec 2010) 04

4 Briefly explain following terms giving example

1. Resolution. 2. Accuracy. 3. Threshold. 4. Precision (June 2011)

07

5 State the need of precision measurement. Explain two standards of linear measurement briefly.

(Nov 2011)

07

6 What are the various possible sources of errors in measurements? What do you understand by

systematic errors and random errors? (May 2012)

07

7 Differentiate between “Precision” and “Accuracy” with suitable example. (May 2012) 04

8 What are the advantages of wavelength standard? (May 2012) 03

10 What do you understand by line and end measurement? Discuss their relative characteristics. (May 2012)

07

11 Differentiate between “Line standard and End standard (Dec 2012) 07

12 Briefly explain with example about relative error , random error and systematic error.

(Dec 2012)

07

Chapter: 2 Linear Measurements1 Describe with sketch the construction and working of a micrometer. Explain how least count is

found and reading is taken. What is zero error? (June 2010)

07

2 Describe with sketch following stating application: (June 2010)

(i) Slip gages (ii) Telescopic gage

3 Describe with sketch the construction and working of Sigma Comparator (June 2010) (Dec

2010)

07

4 State the principal of vernier instrument and explain briefly construction and use of vernier

caliper with a neat sketch. (Dec 2010)

07

5 State the possible source of error in micrometer. Name any four types of micrometer and state

their specific uses. (Dec 2010)

07

6 Explain pneumatic comparator and state the advantages and disadvantages. (Dec 2010) 07

7 Enlist different types of micrometers. What precaution should be observed while using the

micrometer? Draw the sketch indicating reading of 1) 23.78 mm and 2) 73.78 mm on

micrometer (June 2011)

07

8 Explain briefly1. Slip gauges 2. Dial indicator (June 2011)

07

9 What are the salient features of a comparator? Explain SIGMA mechanical comparator with

neat sketch. (June 2011)

07

10 Discuss the constructions and working of vernier depth gauge with neat sketch. (Nov 2011) 07

11 Discuss the constructions and working of telescopic gauge with neat sketch. (Nov 2011)

(June 2013)

07

12 Describe construction, working principle and application of Vernier Micrometer with

neat sketch.(May 2012)

07

13 What are the precautions to be taken while using a micrometer? State the possible

sources of error in micrometer .(May 2012)

07

14 Describe construction, working principle and applications of 1) Vernier micrometer and 2)

Vernier caliper .(Dec 2012)

07

15 Explain the construction and working of vernier height gauge with neat sketch. (June 2013)

07

Chapter: 3 Angular and Taper Measurements1 Describe with sketch following stating application: (June 2010)

(i) Sine bar and (ii) Sine Center

2 Explain how angle of a work piece is measure with the help of angle dekkor and angle gauge.

(Dec 2010)

03

3 What is clinometer? Describe how it can be used for measuring and setting of angle and

illustrate your answer with neat sketch (Dec 2010)

04

4 Explain the construction and use of the following with neat sketch. (i) Vernier bevel protector

and (ii) Sine bar. (Dec 2010)

07

5 Calculate the angle of taper and minimum diameter of internal taper from the following 03

readings. Diameter of bigger ball = 10.25 mm. Diameter of smaller ball = 6.07 mm. Height of

bigger ball form datum = 30.13 mm. Height of smaller ball from datum = 10.08 mm. (Dec

2010)

6 What is a sine bar? Briefly describe its use and limitations. (June 2010) 07

7 Discuss the construction and working of vernier bevel protector with neat ketch. (Nov 2011)

(June 2013)

07

8 What are the angle gauges? How they are used? Explain briefly with neat sketch. (Nov 2011) 07

9 Draw a neat sketch to illustrate the use of sine bar for measurement of taper plug gauge and

explain it briefly. (May 2012)

07

10 Explain the procedure to measure the angle with help of sine-bar when 1) Job is bigger than

sine bar , 2)Job is smaller than sine bar. (Dec 2012)

07

11 It is not prefer to use sinebar for measuring angle more than 45° .Why? (June 2010)

12

Chapter: 4 Screw Thread Measurements1 What is an effective diameter of threads? State its significance. Explain with sketch

Measurement of Effective Diameter by Two Wire method stating limitation (June 2010)

07

2 Explain with neat sketch three wire method of measuring effective diameter of screw thread.

(Dec 2010) (May 2012)(07Mark) (Dec 2012)(07 Marks)

04

3 Briefly explain with sketch the two wire and three wire method of measuring effective

diameter of thread. (June 2010)

07

4 Discuss the elements of screw thread with neat sketch. (Nov 2011) 07

5 What is the best size wire? Derive the expression for the same in terms of pitch and angle of

the thread (May 2012)

07

6 List and explain the different terms related to screw Explain the difference between two wire

and three wire method used for screw thread measurement. (June 2013)

07

Chapter: 5 Gear Measurements1 Describe with sketch the construction and use of Gear Tooth Vernier Caliper. How is the gear

tooth thickness at PCD measured? (June 2010)

07

2 Calculate the chord length and its distance below the tooth tip for a gear of module 4 and 20

degree pressure angle. (Dec 2010)

03

3 List the various elements to be checked for the accuracy of gear and describe any two.

(Dec 2010)

04

4 Explain Parkinson gear tester with a neat sketch. (Dec 2010) (June 2011) 04

5 Enlist various methods for measuring gear tooth thickness. Explain in detail about gear

measurement using gear tooth vernier caliper. Derive equation for measurement. (June 2011)

07

6 Discuss the gear tooth terminology with neat sketch. (Nov 2011) 07

7 Name the various methods used for measurement of tooth thickness and explain any one of

them. (May 2012)

07

8 Explain the method to measure the chordal tooth thickness of given gear by gear tooth vernier

caliper. Calculate the chord length and its distance below the tooth tip for a gear of module 3

mm and 20º pressure angle. (Dec 2012)

07

9 Explain the construction and working of gear tooth vernier caliper. How will you measure gear

tooth thickness with this instrument? (June 2013)

07

10 Explain the construction and working of standard gear tester with neat sketch. (June 2013) 07

Chapter: 6 Measurement of Surface Finish1 Explain Surface Texture and Elements of Surface Roughness. (June 2010) 07

2 Explain the following terms used in surface finish. (i) Roughness (ii) Waviness (iii) Effective

profile (iv) Centreline of profile and (v) Lay (Dec 2010)

03

3 With the help of a neat sketch explain the construction and working of the following.

(i) Tomlinson’s surface meter (ii) Profilometer. (Dec 2010)

04

4 Discuss the methods of measuring surface finish briefly. (Nov 2011) 07

5 Explain numerical evaluation of surface texture with neat sketch. (Nov 2011) 07

6 Explain the terms “Primary texture” and “Secondary texture”. (May 2012) 04

7 State the factors affecting surface texture. (May 2012) 03

8 Define the following terms related to surface roughness measurement. 1) CLA & RMS, 2)

Lay, 3) 3rd & 4th order of geometrical irregularities (Dec 2012)

07

9 Fully describe the surface roughness symbol as per IS-696 showing Ra value, production

method, sampling length, direction of lay, machining allowance ,and other roughness

values in bracket i.e. roughness width and waviness height. (Dec 2012)

07

10 Explain the different surface roughness evaluation methods(June 2013)

11 Explain the construction and working of Telesurf surface roughness measuring instrument

with neat sketch.. (June 2013)

07

Chapter: 7 Straightness, Flatness, Squareness, Parallelism and Machine Tool Tests

1 Describe with sketch the construction and use of a Combination Set stating limitation.

(June 2010)

07

2 Describe with sketch principle, construction and use of Autocollimator. (June 2010) 07

3 Name the various alignment tests to be performed on Lathe and describe any three in

detail. (Dec 2010) (Nov 2011)

07

4 Explain in brief:

1. Straightness. 2. Flatness. 3. Parallelism. (June 2011)

06

5 Alignment test for lathe machine explain various steps in brief. (June 2011) 06

6 Discuss the measurement of straightness with neat sketch. (Nov 2011) 07

7 Name the various alignment tests to be performed on Milling Machine and describe any

three in detail. (May 2012)

07

8 Define the following terms: 1) Straightness, 2) Circularity, 3) Perpendicularity ,

4) Flatness. (Dec 2012)

07

9 Explain in brief with neat sketch the working of “Tool maker’s microscope” .Give it’s

applications. (Dec 2012)

07

10 Explain the importance of alignment tests for machine tools. Briefly explain the alignment

tests for machine tool (any ONE). (June 2013)

07

11 Explain flatness measurement in brief. (June 2013)

Chapter:8 Basic Concepts of Measurements1 Explain with a block diagram Generalized Measuring System and its four functional

elements. Show a block diagram of measurement scheme for Weighing Machine. (June

2010) (June 2013)

07

2 Explain the construction and working of LVDT stating applications. (June 2010) 073 List and explain characteristics of measuring devices stating illustrations. (June 2010) 07

4 What are the Elements of Generalised measurement systems? Identify various elements of

pressure actuated thermometer. (June 2011)

07

5 Discuss the static characteristics of the instrument briefly. (Nov 2011) 07

6 Classify the transducers. Discuss the selection criteria of transducers. (Nov 2011) 07

7 Explain the following terms in mechanical measurement. (May 2012)

(i) Threshold (ii) Overshoot (iii) Range (iv) Span

04

8 Explain the following giving suitable examples: ( i) Range and span (ii) Accuracy and

precision (iii) Threshold and resolution (iv) Calibration (June 2013)

07

Chapter: 9 Temperature Measurement1 List and explain with sketch types of expansion thermometer stating application. (June

2010)

07

2 What are thermisters? What are their advantages? (Dec 2010) 03

3 Explain the construction and working of a resistance thermometer and thermocouple with a

neat sketch. (Dec 2010)

07

4 Explain in brief the principles of thermocouple stating an illustration. A Chromel-Alumel

hermocouple is assumed to have nearly linear operating range up to 1100º C with emf

(reference 0º C) 45.14 mV at this temperature. The thermocouple is exposed to a

temperature of 840 º C. The potentiometer is used as cold junction and its temperature is

estimated to be 25 º C. Calculate the emf indicated on the potentiometer. (June 2010)

07

5 Compare the advantages of thermocouple and thermisters. (Dec 2010) 04

6 Compare bimetallic thermocouple and thermister as temperature measuring devices.

(June 2011)

07

7 Explain Radiation Pyrometer. (June 2011) 04

8 Discuss the construction and working of thermocouple with neat sketch.(Nov 2011) 07

9 What is a ‘Peltier effect’? (May 2012) 03

10 A bimetal strip is constructed of strips of nickel chrome iron alloy and invar bonded

together at 25°C. The strips are 50 mm long and each material has a thickness of 1 mm.

Calculate the radius of curvature produced when the strip is subjected to a temperature

of 200°C Assume the following data:

α1 = 1.7 * 10-6 / °C E1 = 1.5 * 10-6 kgf/cm2

α 2 = 12.5 * 10-6 / °C E2 = 2.2 * 10-6 kgf/cm2 (May 2012)

07

11 Explain briefly the construction and working of a resistance thermometer, stating its

advantages and disadvantages. (May 2012)

07

12 Distinguish between “RTD” and “ THERMISTOR (Dec 2012) 07

13 Mercury has it’s boiling temperature at 350ºC.Is it possible to design a mercury filled

in glass thermometer capable to measure 500 ºC ?-Justify your answer. (Dec 2012)

07

14 Explain the bimetallic thermometer in detail. (June 2013) 07

15 Write a short note on: International temperature scale (ITS). (June 2013) 04

16 Explain the thermoelectric pyrometer in detail. (June 2013) 07

Chapter: 10 Pressure Measurement1 Explain with sketch construction and working of Piezometer & U-Tube Manometer stating

application. (June 2010)

07

2 Describe with sketch construction and working of Dead Weight Pressure Gauge Tester.

State sources of error and their remedies (June 2010) .

07

3 What are the desirable characteristics of a manometric fluid (Dec 2010) 03

4 Explain briefly the following two gauges. Bourdon tube pressure gauge and diaphragm

pressure gauge. (Dec 2010)

04

5 Describe the principle and operation of piezoelectric transducer. Identify the input and

output of the system. (Dec 2010)

07

6 A Mcleod gauge has volume of bulb of measuring capillary equal to 110 x 10 -6 m3 and

measuring capillary diameter of 1.1 mm. Calculate

(ii) The pressure indicated when the reading of the measuring capillary is 28 mm in

case approximate formula is used.

(ii) What is the error if exact formula is used for pressure measurement? (Dec 2010)

03

7 State advantages and limitations of manometers & state the ideal characteristics of

manomatric liquid. (June 2011)

07

8 In a pipeline water is flowing. A manometer is used to measure the pressure drop for flow

through the pipe. The difference in level was found to be 20cm. If the manometric fluid in

CCl4 find the pressure drop in S.I. units (density of CCl4 = 1.596 g/cm3 ). If the

manometric fluid is changed to mercury ( ρ = 13.6 gm/ cm3 ) what will be the difference in

level ? (June 2011)

07

9 What is calibration? Describe method of calibrating Bourdon tube pressure gauge and also

describe the sources of errors in the method of calibration. (June 2011)

07

10 Explain in brief working of Mcleod gauge for pressure measurement. (June 2011) (June

2013)

04

11 Classify the instrument for pressure measurement. Explain bourdon tube pressure gauge.

(Nov 2011) (June 2013)

07

12 Explain the calibration of pressure measuring instrument briefly. (Nov 2011) 07

13 Describe strain gauge. Define gauge factor of strain gauge. What are Rosette gauges

explain with advantages, limitations & application? (May 2012)

07

14 Describe with sketch the construction, working and application of bellow gauge and 07

diaphragm gauge used for pressure measurement. (May 2012)

15 Explain with neat sketch ring balance manometer with comment on its field of application.

(May 2012)

07

16 Briefly explain with neat sketch the Ionization gauge for pressure measurement. State its

pressure measuring capability (Dec 2012)

07

17 Explain the procedure to calibrate the bourdon tube pressure gauge with help of dead weight pressure gauge tester. What precautions we have to take during calibration to minimize errors? (Dec 2012)

07

18 Explain the diaphragm gauges in brief. (June 2013) 04

19 Explain the difference between a bellow gauge and a diaphragm gauge. (June 2013) 04

Chapter: 11 Miscellaneous measurement1 Explain the principle, working and method of speed measurement using Stroboscope

stating an illustration.(June 2010)

07

2 Explain in briefly the following with neat sketch (i) Prony brake dynamometer and (ii)

Rope brake dynamometer. (Dec 2010)

07

3 Explain with neat sketch the arrangement for power measurement of a given I.C.Engine by

rope brake dynamometer. Also derive the equation for power .(June 2011)

07

4 Describe with neat sketch working of piezoelectric accelerometer(June 2011) 04

5 Name the instrument used for force, torque and displacement. Explain prony brake dynamometer with neat sketch. (Nov 2011)

07

6 Explain any one method used for force measurement. (May 2012) 03

7 Describe the use of Piezo-electric transducer to measure force, pressure and vibration.

(Dec 2012)

07