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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING SEMESTER IV • EXAMINATION SUMMER- 2017
Subject Code: 341902 Date: 01 05 -2017
Subject Name: Metrology Instrumentation
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Each question carry equal marks (14 marks)
Q.1

State the elements of measuring systems and explain factors affecting them.
07



07

Define: Metrology Inspection Interchangeability Selective assembly Accuracy vi) Precision Error.





Q.2

Explain working of vernier caliper with neat sketch and write its applications.
07



07

Explain working principle of Micrometer and show following readings by line sketch of Micrometer.
20.32 mm, 35.75mm


20.32 (2)35.75

OR

List the various instruments used for angular measurements. Explain working principle of sine bar with neat sketch.
07


Q.3

Define Straightness and explain any one method of measuring Straightness.
07



07

Explain Parkinson's gear tester with neat sketch and state its limitations.




OR
Q.3

Define Roundness and explain the method of measuring Roundness with the
use of Dial indicator and Vee block.
07



07
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Explain working principle of Auto collimator with optical line diagram.
State its applications.





Q.4

Define Thermistor. State differences between Resistance thermometer and Thermistor.
07



07

Explain working of Dead weight piston gauge with neat sketch.




OR
Q.4

Explain Linear Variable Differential Transformer (LVDT) with sketch. State its advantages and disadvantages.
07


(LVDT)
07

Explain the working principle of hot wire anemometer with neat sketch and give its application.




Q.5

Explain working principle of Bourden tube pressure gauge with sketch.
07



07

Give classification of flow measuring devices and explain Rotating Impeller Meter with neat sketch.




OR
Q.5

Classify automatic control system and explain ON-OFF control system.
07



07

Explain the need of Calibration. Describe procedure for calibration of Vernier Caliper.