Bangalore University 2009 Diploma Instrumentation & Control Engineering Basic Process Instrumentation - Question Paper

III Semester Diploma Examination, November 2009

E & C. Board

BASIC PROCESS INSTUMENTATION

 

Time : 3 Hours Max. Marks : 100

 

Instructions : 1. Section I is compulsory

2.                  Answer any six full questions choosing two questions each

from Section II, III and IV.

SECTION I

1. (a) Fill in the blanks with appropriate word / words :

(i) The ___ is a curved metallic tube having an

elliptical cross-section and sealed at one end.

(ii) A strain gauge is a passive transducer that

converts a mechanical displacement into

a change in ______

(iii) The thermistor is a short name for ____ .

(iv) Capacitive transducers are mainly used for ____

measurement.

(v) Piezo-electric transducers are ___ transducers.

 

(b) Explain the block diagram of Dead Weight Tester.

SECTION II

2. (a) Explain the each block of generalized measurement

system

(b) Define error and mention the types of error.

(c) Explain the static and dynamic characteristics.

3 (a) Explain zero order system with an example

(b) List the classification of electrical transducer.

(c) Explain in briefly : (i) Bellows (ii) Capsule

4. (a) Explain the working of LVDT displacement transducer.

(b) Explain the working principle of variable capacitance

type displacement transducer.

(c) Define instrumentation.

SECTION III

5. (a) Explain briefly unbounded train gauge with neat sketch.

(b) List the material used for the strain gauge.

(c) Mention the classification of electrical strain gauge.

6. (a) Explain the measurement of liquid level by capacitive

probe method.

(b) What is level measurement? Explain Direct Method.

(c) What are the merits and demerits of mechanical strain

gauge ?

7. (a) Explain the working of force-balance type pressure

transducer with neat sketch?

(b) Explain the construction of Bourdon tube with neat

sketch.

(c) Give the merits and demerits of potentiometric pressure

transducer.

SECTION IV

8. (a) Explain the principle of operation of

(i) Mechanical gauges & (ii) Optical gauges

(b) Explain the factors affecting strain measurements..

(c) Define gauge factor.

9. (a) Explain the working of optical pyrometer with neat

sketch.

(b) Explain the construction of thermocouple with sketch.

(c) Explain piezoelectric pressure transducer.

10. (a) Explain the working of Radiation Pyometer with neat

sketch.

(b) Explain the construction of Platinum Resistance

Thermometer.

(c) Define temperature.

 

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