Electro Mechanical Measurement and Instruments — Winter 2022

Explain two basic methods for measurement with suitable examples.

Write a short note on Digital Signal Processing.

Explain significance of measurement in detail.

What are the stages of general measurement system?

Briefly explain the selection criterion of transducers.

With neat sketch explain construction and working of bourdon tube pressure gauge.

Explain generalized measurement system with all functional elements.

Draw the functional block diagram of digital data acquisition system.

Explain any four modes of measurement.

Explain three basic standards in detail with suitable examples.

Briefly discuss wire type, foil type and semiconductor type strain gauges.

An analog volt measuring instrument with a scale range of 0.00 Vto 50.00 V shows a voltage of 20.65 V. The true value of the voltage is 20.70 V. Determine the values of absolute error and correction. Also express the error as a function of the true value and full scale deflection.

Explain following characteristics of a transducer:

Sensitivity (ii) Repeatability (iii) Accuracy (iv) Range (v) Precision (vi) Drift (vii) Dead zone

Explain any one application of capacitive transducer for measuring physical parameter.

Write a short note on hysteresis.

Discuss various points for selection of measuring instrument.

Write a short note on permanent magnet moving coil instrument.

Explain any four dynamic characteristics of a measuring system.

Explain static calibration process in detail.

Derive the expression for output voltage under the load condition of DC excited resistive translational potentiometer (Loading Effect).

Explain hydraulic and pneumatic load cells.

Derive the expression for zero order, first order and second order system.

Compare thermocouple, RTD and thermistor.

Write a short note on piezoelectric accelerometer.

With sketch explain construction and working of rope brake dynamometer.