Download GTU BE/B.Tech 2019 Summer 5th Sem Old 150203 Power Electronics And Control Engineering Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 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 ? SUMMER 2019
Subject Code:150203 Date:31/05/2019

Subject Name:Power Electronics & Control Engineering

Time:02:30 PM TO 05:00 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)
Draw and explain SCR construction in detail. Also draw and explain SCR V-I
characteristics with different operation modes.
07
(b)
Explain speed control of DC motor using SCRs.
07

Q.2 (a)
Explain the construction and characteristics of the TRIAC.
07
(b)
Explain the principle and operation of SCR with two transistor analogy.
07
OR
(b)
Explain construction & characteristics of UJT with neat diagram.
07

Q.3 (a)
Explain variable reactance method for current control in welding process.
07
(b)
Write short note on thermocouples and strain gauge.
07
OR
Q.3 (a)
Explain the basic principle of operation of induction heating and list the advantages of
induction heating.
07
(b)
Draw & explain torque-speed characteristics of DC motor.
07

Q.4 (a)
Draw & explain architecture of microprocessor 8085. Also explain function of various
pins.
07
(b)
Draw and explain memory classification.
07
OR
Q.4 (a)
Explain following instruction with example (i) LDA(ii) JNZ(iii) CMP(iv) LXI(v)
STAX(vi) RRC (vii) LHLD
07
(b)
Explain the programming registers model and flag register in detail.
07

Q.5 (a)
Explain Digital to analog converters.
07
(b)
Explain ladder diagram and ignitron contactors.
07
OR

Q.5 (a)
Draw the block diagram of PLC and describe each block in detail.
07
(b)
Explain Analog to digital converters.
07

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