Download GTU B.Tech 2020 Winter 5th Sem 3152411 Electrical Power Utilization And Traction Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 5th Sem 3152411 Electrical Power Utilization And Traction Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?V (NEW) EXAMINATION ? WINTER 2020
Subject Code:3152411 Date:01/02/2021
Subject Name:Electrical Power Utilization & Traction
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) Give classification of electric welding in tree form.
03

(b) Explain pinch-off effect in induction heating.
04

(c) Explain the principle of dielectric heating with suitable diagram.
07


Q.2 (a) State advantage of electric welding.
03

(b) Discuss faraday's first law of electrolysis.
04

(c) State principle of resistance welding and explain any two types of
07
resistance welding.




Q.3 (a) State factors effecting in electro deposition.
03

(b) Define following terms with respect to illumination :( a) Luminous flux.
04
(b) candle power (c) Lamp efficiency (d) Solid angle

(c) State and explain laws of illumination.
07




Q.4 (a) Write the basic requirements of street lighting.
03

(b) Compare filament lamp with fluorescent lamp in tabular form.
04

(c) Discuss various types of electric motors used for electric traction.
07

Q.5 (a) State the factors affecting selection of drive.
03

(b) Write a short note on rheostat breaking used in traction system.
04

(c) With suitable graphs explain performance characteristics of: (i) DC series
07
motor (ii) induction motor.



Q.6 (a) State the main requirements of an ideal traction system.
03

(b) Discuss advantages of electric traction.
04

(c) Explain block diagram of an electric locomotive describing various
07
equipment and accessories
Q.7 (a) Write a short note on third rail system of current collection.
03

(b) Explain concept of hybrid electric drive trains.
04

(c) Explain trapezoidal speed-time curve with necessary equation.
07



Q.8 (a) Draw architecture of hybrid electric drive trains.
03
(b) Discuss advantage of electrical braking over mechanical braking.
04
(c) Explain series hybrid electric drive and parallel hybrid electric drive.
07

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