Download GTU B.Tech 2020 Summer 6th Sem 2160907 Utilization Of Electrical Energy And Traction Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 6th Sem 2160907 Utilization Of Electrical Energy And Traction Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER? VI EXAMINATION ? SUMMER 2020
Subject Code: 2160907 Date:28/10/2020
Subject Name: UTILIZATION OF ELECTRICAL ENERGY AND
TRACTION
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.


MARKS
Q.1 (a) Suggest suitable drives for following applications
03
1) Lathe 2) Paper mill 3) Electric traction.

(b) Define 1) Luminous efficiency 2) Chemical equivalent
04
3) Refrigerant

(c) Draw speed time characteristic of main line traction system.
07
Also explain each part in detail.
Q.2 (a) Classify different track electrifications.
03

(b) Explain faraday's law of electrolysis.
04

(c) Discuss the various factors that are to be considered in selection
07
of electric drive for particular application.


OR


(c) A 15 KW, 220 V, single phase resistance oven employs nickel-
07
chrome wire for its heating elements. If the wire temperature is
not to be exceed 10000 c and the temperature of the charge is to
be 6000c. Calculate the diameter and length of the wire. Assume
radiating efficiency to be 0.6 and emissivity as 0.9, for nickel
chrome resistivity is 1.016 x 10-6 m.
Q.3 (a) State level of illumination as per Indian standard for following
03
applications
1) Offices 2) Street lighting 3) Hospitals.

(b) Explain function of flywheel with calculations when load is
04
increasing.

(c) Explain direct and Indirect resistance heating.
07


OR

Q.3 (a) Define the following terms with respect to illumination.
03
1) Co-efficient of utilization.
2) Depreciation factor
3) Space height ratio

(b) Discuss properties of resistance heating elements.
04

(c) Construction and working of Arc furnace.
07
Q.4 (a) State advantages of electric welding.
03

(b) Explain dielectric heating.
04

(c) Explain construction and working of direct arc furnace and
07
indirect arc furnace.

OR

Q.4 (a) State requirements of good weld.
03

(b) Explain 1) Electro deposition 2) Electro platting
04

(c) Compare Arc welding and resistance welding
07
1

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Q.5 (a) List out applications of dielectric heating.
03

(b) Compare AC and DC welding
04

(c) Draw a diagram of electric locomotive and explain function of
07
each part I it.


OR
Q.5 (a) Explain with neat diagram the pantograph collector.
03
(b) Compare AC and DC traction system.
04
(c) Draw electrical circuit of a domestic refrigerator. Also explain
07
working of each component in it.

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