Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 5th Sem Old 150203 Power Electronics And Control Engineering Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (OLD) EXAMINATION ? WINTER 2018
Subject Code:150203 Date: 16/11/2018
Subject Name: Power Electronics & Control Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Compare:Transistor vs SCR 07
(b) Explain the principle and operation of SCR with two transistor analogy. 07
Q.2 (a) Explain working principle and operation of dielectric heating. 07
(b) Explain the basic principle of operation of induction heating and list the
advantages of induction heating.
07
OR
(b) Explain in detail functioning of leading and trailing tube circuits. 07
Q.3 (a) Explain construction and V-I characteristics of UJT. 07
(b) Explain energy storage welding system. 07
OR
Q.3 (a) Write a short note on thermocouples and strain guage. 07
(b) Explain the concept of speed control of DC motor using SCRs. 07
Q.4 (a) Draw and explain functional block diagram of microprocessor 8085. 07
(b) Draw and explain flag register of microprocessor 8085 in detail. 07
OR
Q.4 (a) Explain successive-approximation type A/D converter and Dual slope A/D
converter.
07
(b) Explain programmable Logic controller with necessary diagrams. 07
Q.5 (a) Draw and explain the pin diagram of microprocessor 8085. 07
(b) Explain ladder diagram and ignitron contactors. 07
OR
Q.5 (a) Draw block diagram of PLC and also explain any one application of it. 07
(b) Explain program counter in detail.What is the function of stack pointer in 8085
microprocessor?
07
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This post was last modified on 20 February 2020