Electro Mechanical Measurement and Instruments — Winter 2024

Define the terms measurement and instrumentation.

Explain direct and indirect methods of measurement.

Explain in detail the classification of instruments.

Enlist different standards used for measurements.

Compare Gross Error, systematic Error, and Random Errors.

Explain the “Generalized Measurement System” with all its functional blocks with suitable examples.

Explain how the hand speed tachometer works with a sketch.

What is tertiary measurement? Explain it with any one example.

Compare static characteristics with dynamic characteristics for instruments.

Explain the working of the Piezoelectric Accelerometer with the sketch.

Discuss the working Principle of LVDT.

Explain with sketch Hydraulic Dynamometry.

Explain the following characteristics of a transducer: (i) Sensitivity (ii) Repeatability (iii) Accuracy (iv) Range (v) Precision (vi) Drift (vii) Dead zone

Explain the principle of operation of the current transformer.

Derive the output voltage expression of the Wheatstone Bridge circuit for strain measurement.

Discuss the difference between PMMC and PMMI-type instruments.

Explain the principle of operation of the potential transformer.

Compare thermocouple, RTD and thermistor.

Explain different methods for resistance measurements.

Compare eddy current dynamometer with rope brake dynamometer

What are the selection criterion of transducers for industrial applications?

Explain Piezoelectric Sensors and loading effects

Write a short note on Hysteresis.

Prove that the differential arrangement of the capacitive displacement transducer gives a linear response.

Explain the working of inductive transducers.