RTU 2016 Question Paper Semester VIII Electronic Instrumentation and Control Engineering Industrial Electronics

-h
i? lL,'r [ ?.0' ,

t-{
y
l-\

B.Tech. VIil Semester (Main) Examination,April/May 2016
-€
Electronic fnstrumentation & Control Engg.
rc
m 8EI1A Industrial Electronics

Time : 3 Hours Maximum Marks : 80
Min. Passing Marks : 24

Attempt anyfive questions, selecting One questionfrom each unit. All questions
carry equal marlcs. (Schematic diagrams must be shown wherever necessary.
Any data you feel missing suitably be assumed and stated clearly.
Units of quantities usedlcalculated must be stated clearly.

Unit - I
1. a) Explain the working of SCR and its V-I characteristics using suitable circuit
diagram. (Si
b) Explain the workingprincipal of GTO (4:)

c) Compare power diode and crystal diode {4)
OR
1. a) Compare power transistor and ordinary transistor (a)
b) ExplaintheworkingprincipaloflGBTusingsuitablecircuitdiagram (s)
c) Explain the role of iatching current and holding current (4)

Unit - II
2. a) Draw the schernatic diagram of single phase bridge rectifier and explain its
workingusingwaveforrn (S)

888101/zore (1) [Contd"..

(8)
b) Compare voltage and current source inverter
OR
and explain its working
2. a) Draw the schematicv sr*€'r-.'^
diagfam ofvoltage source inverter
(8)
usingwave form
(8)
b) Explain the working of three phase bridge rectifi er
Unit - III

3. a) Compare step up and step down choppers $)

b) Draw the schematic diagram of SMPS and explain its working principal usT.g
(8)
suitable circuit diagram

c)Explaintheworkingprincipalofflvr^rackconverter.(4)

3. a) Define the need ofunintemrptible porver supply. Compare UPS with inverter
(o,
Explain the working principal of UPS'

b) compare boost converter and buck-boost converter. (8)

Unit - tV

4. a) ' phase
--' Explain the speed control of three I induction motor using frequency(8)-
.ont o1 ..tt 6O

b) Compare voltage and frequency control methods of 3-6 induction motor(8)
OR
(16)
4. Explain the different method of speed control of Dc motor

Unit - V
(8)
5. a) Explain the working principal of variable reluctance stepper motor
(8)
b) Compare hybrid and permanent magnet stepper motor

888101 (2)

OR

5. Write short notes on following
(8)
a) Induction Heat control
(8)
b) Dielectric heat confrol

888101 (3)