Download GTU BE/B.Tech 2018 Winter 4th Sem Old 141901 Mechanical Measurement And Metrology Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-IV (OLD) EXAMINATION - WINTER 2018

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Subject Code:141901 Date: 05/12/2018
Subject Name: Mechanical Measurement & Metrology
Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) Explain the need of standards of measurements in the modern industrial system. 07
(b) Explain line and end standards with examples. 07

Q.2 (a) Describe the application of following term with neat sketch: 07

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(1) Slip gages (ii) Telescopic gage (iii) Sine bar and (iv) Sine Center
(b) Describe the construction and working of a sigma comparator. Discuss its advantages and disadvantages. 07

OR

(b) Describe the construction and working of a Pneumatic comparator. Discuss its advantages and disadvantages. 07

Q.3 (a) Explain the three wire method to measure the effective diameter of screw thread with neat sketch. 07

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(b) Write short note on the Parkinson gear tester. 07

OR

Q.3 (a) Derive the expression for best wire size. 07
(b) List the various elements to be checked for the accuracy of gear and describe any two. 07

Q.4 (a) Sketch and describe the construction and working of Tomilson surface roughness tester. 07

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(b) Write short note on Tool maker’s microscope. 07

OR

Q.4 (a) Describe following types of errors and how these can be taken care of 07
(1) Parallax error (ii) Backlash error.
(b) Describe LVDT with its advantages, limitations and applications. 07

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Q.5 (a) Explain the working principle of bimetallic thermometer. 07
(b) Write short notes on Bourdon tube. 07

OR

Q.5 (a) What is Load Cell? State various types of load cells and their use and explain any one of them with neat sketch. 07
(b) Write short note on prony brake dynamometer. 07

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