Winter 2015 Metrology and Intsrumentation Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER – IV-EXAMINATION – WINTER 2015
Subject Code: 3341905 Date: 09/12/2015
Subject Name: Metrology & Instrumentation
Time: 02:30 PM TO 5:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.

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Q.1 Answer any seven out of ten. 14

1. Define: (1) Metrology (2) Inspection

2. State name of direct measuring instruments.

3. Define : Flatness

4. What is CLA value.

5. Define : Pitch of thread.

6. Define: Module.

7. Write advantages of LVDT.

8. State why calibration is necessary?

9. State application of Thermometer.

10. Differentiate between Accuracy and Precision.

Q.2 (a) Explain the functions of inspection. 03

OR

(a) Explain the need of end standard. 03

(b) Write short note on Non destructive testing ( NDT ). 03

OR

(b) Explain in brief interchangeability and selective assembly. 03

(c) Draw neat sketch of height gauge. 04

OR

(c) Draw neat sketch of gear tooth vernier. 04

(d) Explain principle and working of height gauge. 04

OR

(d) Explain principle and working of gear tooth vernier. 04

Q.3 (a) Explain in brief any one straightness measuring method. 03

OR

(a) Explain in brief any one flatness measuring method. 03

(b) Draw neat sketch of screw thread and label its elements. 03

OR

(b) Explain working principle of stylus instruments. 03

(c) How angle is measured with help of sine bar. 04

OR

(c) Explain the wringing process for joining slip gauge. 04

(d) Select most appropriate slip gauges from M-112/1 set for following
dimensions. (1) 34.4785 (2) 72.985 04

OR

(d) Explain working and application of angle dekkar. 04

Q.4 (a) Write short note on calibration of vernier caliper. 03

OR

(a) Write short note on dial indicator 03

(b) Describe Three wire method for measuring an effective diameter of thread. 04

OR

(b) Explain Parkinson’s gear tester. 04

(c) Explain the working principle of radiation pyrometer with neat sketch. 07

Q.5 (a) Write short note on dead weight piston gauge. 04

(b) Write short note on capacitance type transducer. 04

(c) Write short note on rotameter. 03

(d) Name different limit gauges, state their applications. 03

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