Download GTU BE/B.Tech 2018 Winter 5th Sem Old 150203 Power Electronics And Control Engineering Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-V (OLD) EXAMINATION - WINTER 2018

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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.

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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]

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(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]

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OR

Q.3 (a) Write a short note on thermocouples and strain gauge. [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]

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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]

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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]