Code No. 2057 FACULTY OF ENGINEERING B.E. 3/4 (Inst.) II Semester (Suppl.) Examination, December 2012 Subject: Instrumentation Systems – II Time: 3 Hours

Max.Marks: 75

Note : Answer all questions from Part A. Answer any Five questions from Part B. PART – A (25 Marks) 1. Specify one advantage and one disadvantage of Orifice meter.

(2)

2. What are the three major factors that forms the basis of the type of flow measuring device applicable.

(3)

3. Explain level measurement using capacitive sensors?

(2)

4. Enumerate the types of pH-electrodes used for pH measurement?

(3)

5. State relative humidity, what is the name of the instrument used for humidity measurement.

(3)

6. What is phychrometer?

(3)

7. Explain the principle of piezoelectric microphone.

(3)

8. What is the principle of E.M. flow meter?

(2)

9. What is a microwave refractometer?

(2)

10. Explain the principle of Bimorph position – control system.

(2)

PART – B (50 Marks) 11.(a) Explain the operation of PMMC inverse transducer. (b) With a neat block diagram, explain how a self-balancing servo operated potentiometer works.

(5) (5)

12.

Explain the construction, working of head type of florometer and also derive the expression for mass flow rate.

(10)

13.

With neat diagram explain the principle of operation of feed back pneumatic load cell.

(10)

14.

Write short notes on: (a) Aluminium oxide hygrometers (b) Installation and measurement of pH values.

(5) (5)

15.

What is a sound level meter? Explain the types of microphones. How is sound measured using microphones.

(2) (2) (6)

16. (a) How can liquid level be measured with gamma rays? Explain the method with neat diagram. (b) What are the electrical methods available for measurement of level? 17.

Write short notes on: (a) Anemo meters (b) Servo operated E.M. flow meter.

(5) (5) (10)

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