Rajasthan Technical University 2009-1st Year B.Tech : - (semester 2) Instrumentation - Question Paper

B.Tech I- Year (Sem. II) Examination, August-2009
Instrumentation


Unit I

1. a) describe accuracy and precision, How it differ from every other? - discuss. [Marks 4]
b) Errors in measurements can be classified as:
i) Gross Errors
ii) Systematic Errors
iii) Random Errors.
discuss these errors by giving suitable examples. explain the means adopted to minimize these errors. [Marks 12]

OR

1. a) define the Gaussian fault analysis in detail. [Marks 8]

b) 2 resistors have the subsequent ratings:
R1 =200om +- 5%, R2 = 100om +- 5%
Determine the magnitude of resulting resistance and the limiting errors in percentage and in ohms if the above resistances are connected in
i) Series and
ii) Parallel. [Marks 8]


Unit II

2. a) explain the advantages of electronic voltmeter as compared with conventional kind of voltmeter. [Marks 4]
b) provide the salient features of average, peak and rms responding electronic voltmeter. [Marks 12]

OR

2. a) Draw the block diagram of the vector impedance meter. discuss how it is used for phase angel and impedance measurement. [Marks 12]

b) elaborate the issues encountered in measurement of voltage and power at radio frequencies? -Explain [Marks 4]



Unit III

3. a) Draw the block diagram of basic CRO and discuss every block. [Marks 10]
b) discuss various kind of probes used with Oscilloscope. [Marks 6]

OR

3. a) discuss how the subsequent measurements can be made with the use of CRO :
i) Frequency
ii) Phase angle. [Marks 12]

b) compute the velocity of the electron beam when the anode voltage of 2000 V is applied to its accelerating anode. [Marks 4]



Unit IV

4. a) define Wien bridge oscillator with the help of circuit diagram. provide its merits and demerits. [Marks 8]

b) Discus with the help of neat block diagram the elements of standard signal generator. [Marks 8]

OR

4. a) define with block diagram a sweep frequency generator and its applications. [Marks 8]
b) define functional generator with neat block diagram. [Marks 8]



Unit V

5. a) What is an LVDT? discuss its working and characteristics with necessary diagrams. [Marks 10]
b) Distinguish ranging from active and passive electrical transducers and provide a few examples of every.
[Marks 6]

OR

5. a) describe gauge factor of a strain gauge and find its expression. Also discuss its significance. [Marks 10]
b) How does a piezoelectric transducer work? elaborate the common materials used for it? [Marks 6]

Earning:   Approval pending.