Mumbai University Previous year question papers
VI Sem Electronics Examination June 2010
Electronics Instrumentation System
N.B. : (1) Question No.1 is compulsory.
(2) Answer any four questions out of remaining six questions.
(3) Assume suitable data wherever necessary.
1. Answer any five of the following: (20)
a. What are the various types of the errors in measuring systems?
b. State the advantages of electrical transducers.
c. Defme the gage factor in Strain Gage.
d. Explain the logarithmic compression used for signal conditioning in Instrumentation system.
e. Explain the role of final control element closed loop process control system. :
f. What is calibration? State its importance?
Q2. a. What are the different errors encountered in measurements? Explain with suitable examples. (10) i
b. Explain the types,c onstruction,w orking principle and operationo f ultrasonicf low mete with suitable sketch. (10) i
Q3. a. Draw a neat block diagram of multichannel analog multiplexed Data Acquisition System and explain its operation. (10)
b. Draw the neat diagramo f Solenoidv alve and Servomechanismas an electricala ctuators to control the air or liquid flow. (10)
Q4. a. What is the standardc alibrationp roceduref or calibrating a process?H enceg ive the steps for three point calibration method. What are the disadvantages of the 3-point method. (10)
b. The Pt 100 RTD is used to measure the temperature from 0 t~ 200°C. Suggest the signal conditioning scheme and hence design an instrumentation amplifier to give an output voltage from (OV to 200m V). (10)
Q5. a. Describe an operating principle of dew point instrument used to measure moisture and humidity in gases, with neat schematic diagram. (10)
b. Draw the neat block diagram of data logging system and hence differentiate with DAS?
Give the advantages of data logging system. (10)
Q6. a. For proportional control mode explain
how to calculate proportional gain and proportional band. State and explain the offset in proportional control mode. (10)
Q7. a. Differentiateb etweena ctivea ndp assivefi lters.
b. What is RESET controller? (05)
c. What is the need of tuning of controller? Hence explain the steps used for tuning the controlleur singZ igler-NicholsC ontinuouCs yclingM ethodf or P, P+I andP +I+D controller.