GUJARAT TECHNOLOGICAL UNIVERSITY
SEMESTER-VI(NEW) — EXAMINATION - SUMMER 2019
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Subject Code:2162407 Date:14/05/2019
Subject Name:Electrical Power Utilization & Traction
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Classify electric drives. [03]
(b) Draw & discuss block diagram of electric drive. [04]
(c) Write a brief note on Selection of drive for applications of Textile mill, paper mill, steel mill, printing press, crane, lift. [07]
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Q.2 (a) State Specifications of squirrel cage and slip ring induction motors. [03]
(b) Write a short note on visibility spectrum curve of relative sensitivity of human eye. [04]
(c) Explain construction and working of incandescent lamps their characteristics. [07]
OR
(c) Explain construction and working of discharge lamps and their characteristics. [07]
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Q.3 (a) State advantages of electrical heating. [03]
(b) Give classification of electrical heating. [04]
(c) Discuss dielectric heating and its applications. [07]
OR
Q.3 (a) State advantages of electric welding. [03]
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(b) Give comparison between AC and DC arc-welding. [04]
(c) Explain in detail projection seam and butt welding. [07]
Q.4 (a) Explain principle of arc production. [03]
(b) Describe principle of galvanizing and its application. [04]
(c) Explain process of electroplating. [07]
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OR
Q.4 (a) Define: Illumination & Luminous flux. [03]
(b) Discuss the role of Air Conditioning in our day to day life. [04]
(c) Explain process of electro-deposition - clearing. [07]
Q.5 (a) Describe working of AC series motors. [03]
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(b) Description of Electrical circuit used in refrigerator. [04]
(c) Discuss various types of motors used in traction. [07]
OR
Q.5 (a) Write a short note on third rail system of current collection. [03]
(b) Write a short note on : Metro railways [04]
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(c) Explain clearly speed time curves for different services. [07]
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