Download GTU BE/B.Tech 2019 Summer 4th Sem New 2141901 Mechanical Measurement And Metrology Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 4th Sem New 2141901 Mechanical Measurement And Metrology Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2141901 Date:17/05/2019
Subject Name: Mechanical Measurement & Metrology
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.


Q.1 (a) Define: (i) Precision (ii) Accuracy 03
(b) State and explain the important elements of measurement. 04
(c) Describe with neat sketch International Prototype Meter (Material Length
Standard) stating material composition and limitations.
07

Q.2 (a) Give comparison between comparator and mechanical instruments. 03
(b) List out advantages and disadvantages of electrical comparators. 04
(c) Sketch and explain the working of a vernier caliper used for internal and
external length measurements?
07
OR
(c) Explain with neat sketch the construction and working of Johansson
Mikrokator.
07
Q.3 (a) Explain the working principle of strain gauge load cell with neat sketch. 03
(b) Explain Eddy-current dynamometer with sketch. 04
(c) Describe with sketch proving ring stating its uses and advantages. 07
OR
Q.3 (a) Give the classification of Tachometers 03
(b) Explain the working principle of stroboscope. 04
(c) Explain hydraulic force meter and pneumatic force meter with advantages
and disadvantages.
07
Q.4 (a) Give the comparison between resistance thermometer and thermocouple. 03
(b) List out the advantages and disadvantages of thermistors. 04
(c) Describe with sketch a liquid-in-glass thermometer. Explain its application. 07
OR
Q.4 (a) Give the classifications of threads. 03
(b) Explain the common errors in threads. 04
(c) Explain surface texture and elements of surface roughness. 07
Q.5 (a) State the factors which are responsible for surface finishing. 03
(b) List out and explain comparison methods of measuring surface finish. 04
(c) Derive the expression for best wire size. 07
OR

Q.5 (a) Give the comparison between systematic errors and random errors 03
(b) Write a short note on : ?Coordinate Measuring Machine? 04
(c) Explain optical pyrometer with neat sketch. 07

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