0
428views
Electronic Instruments And Measurements Question Paper - May 18 - Electronics Engineering (Semester 3) - Mumbai University (MU)
1 Answer
0
0views

Electronic Instruments And Measurements - May 18

Electronics Engineering (Semester 3)

Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.

Attempt any four:

1.a. Define the following static characteristics of instruments.

  1. Sensitivity.

  2. Precision.

  3. Dead zone.

  4. Drift.

  5. Accuracy

(5 marks) 00

1.b. Draw a neat circuit diagram of LCR - Q meter and explain its operating principle.
(5 marks) 00

1.c. Compare dual slope and dual beam CRO.
(5 marks) 00

1.d. Describe operating principle of harmonic distortion analyzer with a neat block diagram.
(5 marks) 00

1.e. With a neat diagram, explain the principle of digital time measurement.
(5 marks) 00

1.f. Compare sensor and transducer.
(5 marks) 00

2.a. Voltmeter having a sensitivity of 1000 ohm/ volts read 100 V on its 150 V scale when connected across an unknown resistor in series with a millimeter, when millimeter reads 5m A

  1. Calculate apparent resistance of unknown resistor.

  2. Calculate actual resistance of unknown resistor.

  3. Calculate error due to loading effect of voltmeter.

(10 marks) 00

2.b. Wien Bridge is one of the AC bridges as shown in the figure below. Derive conditions under which the bridge becomes balanced. Which quantity / parameter is it used to measure?

enter image description here

(10 marks) 00

3.a. Draw the block diagram of dual trace CRO and explain its operation.
(10 marks) 00

3.b. Explain how Lissajous patterns / figures are used for measurement of an unknown frequency and phase shift using a cathode ray oscilloscope (CRO).
(10 marks) 00

4.a. Draw the circuit diagram and explain the operation of bridge used to measure capacitance.
(10 marks) 00

4.b. Explain various features of digital storage oscilloscope.
(10 marks) 00

5.a. Draw the neat diagram and explain the operation of successive approximation type DVM.
(10 marks) 00

5.b. In a food processing unit, a highly acidic solution is stored in a storage tank where its level has to be continuously monitored round the clock. Your supervisor suggests that due to highly acidic nature of the solution, a non-contact transducer should be used for the level measurement ? Which transducer will you use for above application ? Describe its operation with a neat diagram.
(10 marks) 00

6.a. Draw the diagram and explain the operation of Rotameter.
(10 marks) 00

6.b. Explain the operation of Pirani gauge for pressure measurement ?
(10 marks) 00

Please log in to add an answer.