GUJARAT TECHNOLOGICAL UNIVERSITY
BE SEMESTER VII EXAMINATION — WINTER 2017
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Subject Code: 170204 Date: 15-11-2017Subject Name: Automobile Mechanical Measurements
Time: 10:30 am to 01:00 pm Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) What do you understand by measurement? Explain different methods of 07 measurement.
(b) Explain the terms Limits, fits and tolerances with examples in brief. 07
Q.2 (a) Explain slip gauges with ringing process. 07
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(b) Which are the different sources of errors in measurement? Explain the terms 07 precision and accuracy related to measurement.
OR
(b) Describe with neat sketch construction and working principle of Vernier height 07 gauge.
Q.3 (a) List different types of comparators and explain the working of Sigma 07 comparator.
(b) Explain the following methods for surface finish: 07
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- Ten point height method
- Peak to valley height method
- Average roughness method
OR
Q.3 (a) Describe with neat sketch construction and working of micrometer. Explain the 07 method to take the readings.
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(b) Explain the construction and-working of LVDT with its advantages and 07 disadvantages.
Q.4 (a) Give the classification of clinometers. Explain any one of them with a neat 07 sketch.
(b) Explain the following terminology for gears: 07
- Profile checking
- Backlash checking
- Checking of composite errors
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OR
Q.4 (a) Explain the working principle of thermocouple with its advantages and 07 disadvantages.
(b) Write a short note on diaphragm pressure gauge. 07
Q.5 (a) Write a short note on hot wire anemometer. 07
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(b) Explain in brief Pitot gauge and Ionization gauge. 07
OR
Q.5 (a) Explain the principle and types of electrical strain gauges. 07
(b) Discuss in brief peizo electric and seismic accelerometer. 07
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