Transducers - 2 - December 2015

MU Instrumentation Engineering (Semester 4)

Total marks: --
Total time: -- INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Attempt any four

1(b) Explain 'Vena contracta' with pressure diagram. 5 marks

1(c) Derive Bernouli's equation. 5 marks

1(d) Explain types of strain gauges. 5 marks

2(a) Classify flow transducers. Explain with diagram variable Area type flow meter. 5 marks

2(b) Explain working of 'Mcleod Gauge'. 5 marks

3(a) Compare venturi meter and orifice meter. 5 marks

3(b) A strain gauge is bonded to abeam 0.1 m long and has a cross sectional are a 4 cm³. Youngs modulus for steel is 207 Gn/m. The stain gauge has an unstrained resistance of 240ω and gauge factor of 2.2 when a load is applied , the resistance of gauges changes by 0.013 Ω. Calculate the change in length of the steel beam and an amount of force applied to the beam. 5 marks

4(a) Explain with neat diagram pressure measurement scheme using primary and secondary transducer 5 marks

4(b) Explain conductivity measurement scheme using suitable diagram. Also explain details about electrodes. 5 marks

5(a) List the different flow measurement systems. Explain with diagram Ultrasonic flow measurement system. 5 marks

5(b) Classify pressure transducers. Draw neat sketch of pressure sensing elastic elements. Explain with diagram different types of manometers. Also give their mathematical expression. 5 marks

Write short note on (any two):-

6(b) Bulk modulus 5 marks

6(c) Force measurement 5 marks