Maharashtra State Board of Technical Education 2008 Diploma Industrial Electronics and Applications - Question Paper

Sample ques. Paper
Course Name : Diploma in Industrial Electronics
Course Code : IE / IU
Semester : 5th for IE and 6th for IU
Subject : Industrial Electronics and Applications
Marks : 80 Time: three Hrs

Instructions:
1. All ques. are compulsory.
2. Illustrate your answers with neat sketches wherever necessary.
3. Figures to the right indicate full marks.
4. presume suitable data if necessary.
5. Preferably, write the answers in sequential order.

Q.1 Attempt any FOUR. [Marks:16]
a) Draw the block diagram of SMPS and discuss it.
b) provide the constructional details of Power MOSFET.
c) Draw the circuit diagram of series inverter & draw their Input & Output
waveform.
d) discuss zero voltage switching used in inverters.
e) Draw the circuit diagram of delay timer using SCR & UJT & discuss it.

Q.2 Attempt any THREE. [Marks:12]
a) What is the need of AC Voltage regulator and draw the circuit diagram of relay
kind AC voltage regulator.
b) State the basic principle of resistance welding system and list their kinds.
c) Draw and discuss emergency light system.
d) What is the basic concept of chopper and draw the circuit diagram of step down
chopper.

Q.3 Attempt any THREE. [Marks:12]
a) Draw and discuss characteristics of IGBT.
b) discuss P.W.M. concept for Inverter.
c) What is the commutation and how it is used for inverter circuit.
d) Draw the circuit diagram of parallel inverter with their input /output waveform.

Q.4 Attempt any TWO. [Marks:16]
a) provide the constructional detail about IGBT and discuss operating principle of it.
b) Draw and discuss Jones Chopper circuits with their waveforms and list
applications.
c) Draw the circuit diagram of temperature controller and discuss it.

Q.5 Attempt any THREE. [Marks:12]
a) How will you decrease the harmonics using PWM inverter?
b) Draw the block diagram of UPS and discuss it.
c) provide the difference ranging from Offline and Online UPS system.
d) discuss the term conduction loss & switching loss.

Q.6 Attempt any TWO. [Marks:12]
a) 1. provide the short note on SIT.
2. provide the constructional details of MCT.
b) Distinguish ranging from relay kind and servo kind AC voltage regulator.
c) Draw and discuss Mc-murray inverter.

Earning:   Approval pending.