Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 6th Sem New 2160911 Computer Aided Analysis And Design For Electrical Engg. Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? VI (New) EXAMINATION ? WINTER 2019
Subject Code: 2160911 Date: 12/12/2019
Subject Name: Computer Aided Analysis and Design for Electrical Engg.
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) State the performance parameters expected to be outputted on running any
Computer Aided Design program.
03
(b) Compare top down and bottom up approaches in CAD programs. State example
of the same.
04
(c) Explain general procedure to design DC machine optimally drawing flowchart
of the same.
07
Q.2 (a) State requirements of the high conductive materials 03
(b) Explain properties of low, medium and high hysteresis losses material drawing
hysteresis loops of any three materials.
04
(c) Consider the case of a single-phase induction motor seems to draw full load
current at 60% of rated load.
Estimate probable causes for the same.
Discuss how Finite Analysis helps to improve design to overcome above
problem. Describe steps involved in process in brief.
07
OR
(c) Interpret role of FE Analysis tool in conventional Computer Aided Designing
process.
Explain significance and function of followings in respect to FE Analysis:
i) Meshing
ii) Boundary conditions
iii) Static analysis
iv) Transient analysis
07
Q.3 (a) Suggest type of slot winding out of following options:
(A) Integral slot winding (B) Fractional slot winding
For 3 phase, 4 pole, 66 slots armature.
(show calculations and justify your answer in one-two lines)
03
(b) Discuss the algorithmic steps 3-point starter design
04
(c) Illustrate a case of design optimization where FE Analysis of electrostatic field
with appropriate diagrams.
07
OR
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? VI (New) EXAMINATION ? WINTER 2019
Subject Code: 2160911 Date: 12/12/2019
Subject Name: Computer Aided Analysis and Design for Electrical Engg.
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) State the performance parameters expected to be outputted on running any
Computer Aided Design program.
03
(b) Compare top down and bottom up approaches in CAD programs. State example
of the same.
04
(c) Explain general procedure to design DC machine optimally drawing flowchart
of the same.
07
Q.2 (a) State requirements of the high conductive materials 03
(b) Explain properties of low, medium and high hysteresis losses material drawing
hysteresis loops of any three materials.
04
(c) Consider the case of a single-phase induction motor seems to draw full load
current at 60% of rated load.
Estimate probable causes for the same.
Discuss how Finite Analysis helps to improve design to overcome above
problem. Describe steps involved in process in brief.
07
OR
(c) Interpret role of FE Analysis tool in conventional Computer Aided Designing
process.
Explain significance and function of followings in respect to FE Analysis:
i) Meshing
ii) Boundary conditions
iii) Static analysis
iv) Transient analysis
07
Q.3 (a) Suggest type of slot winding out of following options:
(A) Integral slot winding (B) Fractional slot winding
For 3 phase, 4 pole, 66 slots armature.
(show calculations and justify your answer in one-two lines)
03
(b) Discuss the algorithmic steps 3-point starter design
04
(c) Illustrate a case of design optimization where FE Analysis of electrostatic field
with appropriate diagrams.
07
OR
2
Q.3 (a) State the significance of specific magnetic loading. 03
(b) Identify sequential steps for designing a small transformer.
04
(c) Evaluate significance of optimal selection Max-Min range of following
parameters for distribution transformer.
i) kg/kVA ii) Efficiency iii) inrush current iv) Maximum flux density in core.
07
Q.4 (a) State criteria for selection of type of armature windings out of Lap or Wave. 03
(b) Estimate requirement of dummy coil for following armature winding.
4 pole, 18 slot, double layer is to be designed with wave winding.
04
(c) Develop algorithm for design of starting resistance for DC motor. 07
OR
Q.4 (a) State the classes of insulation in transformers based on temperature. 03
(b) Explain sequential steps for drawing Lap winding diagram. 04
(c) Predict the change in performance of DC machine with change in following
design parameters:
i) Pole arc to pole pitch ratio
ii) Core flux density
iii) Slots per pole per phase
07
Q.5 (a) Develop algorithmic steps for the design of Tank for oil natural air forced type
transformer casing.
03
(b) Differentiate design criteria for shunt, series and separately excited DC motors. 04
(c) Explain significance of different types of enclosures for rotating DC machines. 07
OR
Q.5 (a) State standard rating of distribution transformer for LT consumer. 03
(b) Develop heat flow diagram in rotating DC machines. 04
(c) Illustrate a case of design optimization where FE Analysis of electrostatic field
in transformer with appropriate diagrams.
07
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This post was last modified on 20 February 2020