Industrial Instrumentation — Summer 2018

Define Transducers. Discuss need of Transducers in process control industry. Mention at least five technical advantages of Electrical Transducers.

Draw block diagram of Instrumentation System. Explain every block.

Give classification of Strain Gauge with reference to principle of operation and constructional features. A Strain Gauge with gauge factor of 4 has a resistance of 120 Ω when unstrained. If the strain gauge undergoes a change in length from 0.25 mm to 0.255 mm, find the new resistance.

Why temperature compensation is required in strain gauge? Explain temperature compensation through bridge arrangement.

Mention at least four applications of Hall effect Sensors and Proximity Sensors.

Explain principle of Capacitive Sensors for measurement of displacement.

Write a short technical note on Synchros and Resolvers.

Which parameters decide Sensitivity of load cell? What are the limitations of Pirani Gauge?

Explain construction and working of Piezoelectric pressure transducer.

Explain Seebeck effect and Thomson effect. Mention temperature range for Pyrometer, Thermocouple and Thermistors.

Explain in detail filament type Optical Pyrometer for very high temperature measurement.

Explain principle of Venturi Tube for Flow Measurement. Mention its advantages and disadvantages.

Explain Inductive method of level measurement with diagram.

Write short technical note on X-Y Recorders.

Write short technical note on Ultrasonic Flow Meter.

What are the Objectives of Data Acquisition System? Differentiate Time-based system and Event-based system for acquiring raw data.

Explain n-Channel Data Acquisition System with block diagram.