Chapter: 6

Metrology

1 Define Metrology. Explain clearly difference between primary, secondary and working

standards. 2 Explain objectives of Metrology. 3 What are the various possible sources of errors in measurement? Define static error and

explain any two static errors with example. 4 Describe with neat sketch “Imperial standard Yard”. 5 Differentiate the followings briefly.

(i) Precision and Accuracy (ii) Line and End Standards (iii) Systematic Error and Random Error (iv) Instrument and Measurement

6 Classify measurement methods. Discuss Primary, Secondary and tertiary methods of measurement with suitable examples.

7 Describe with sketch International Prototype Meter (Material Length Standard) stating material composition and limitations.

8 What are the various possible sources of errors in measurements? What do you understand by systematic errors and random errors?

9 Differentiate between “Precision” and “Accuracy” with suitable example. 10 What are the advantages of wavelength standard? 11 What do you understand by line and end measurement? Discuss their relative

characteristics. 12 State the need of precision measurement. Explain two standards of linear measurement

briefly. 13 Describe the following types of errors and state how they can be taken care of.

(i) Environmental error (ii) Error due to vibration. 14 State and explain five basic elements of measuring system. 15 Differentiate between “Line standard and End standard”