Mechanical Measurement and Metrology — Winter 2021

Define the terms: (i) Threshold (ii) Linearity (iii) Sensitivity

Differentiate following terms: - 1) Systematic and random errors, 2) Reproducibility and Repeatability

What is coordinate measuring machine? Discuss various configuration of CMM.

eErxroprlas.i n the working principle of a laser transducer system.

What is the basic difference between sine bars, sine plates, and sine tables?

Explain vernier micrometer Screw with neat sketch. How least count of vernier micrometer can be calculated?

Explain with neat sketch how conical work pieces are inspected on a sine centre.

Give comparison between involute and cycloidal gears.

Explain Parkinson gear tester with neat sketch.

Derive the depth of gear using constant chord method

How is Taylor’s principle applicable to thread gauging?

Derive the expression for the best-size wire in a two- wire method.

Derive the diameter over wire(Maximum) Hfor thread measurement using three wire method

Explain the characteristics of good comparator.

What are the primary reasons for surface irregularities?

Explain with neat sketch construction and working of sigma comparator.

Give a detailed classification of fits.

Differentiate between hole basis and shaft basis systems.

Describe with neat sketch “Linear Variable Differential Transformer”. Comment on its application.

Explain the principle and types of thermocouple.

Explain briefly the methods of force measurement.

Write a short note on rope brake dynamometer,

Classification of instruments for pressure measurement.

What is gauge factor? Explain its importance.

Sketch and explain McLeod Gauge used for low pressure measurement.