Download GTU BE/B.Tech 2019 Summer 8th Sem Old 180902 Electrical Power Utilization Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 8th Sem Old 180902 Electrical Power Utilization Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VIII (OLD) EXAMINATION ? SUMMER 2019
Subject Code: 180902 Date: 09/05/2019

Subject Name:Electrical Power Utilization

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.
Q-1 (a) State and explain advantages of electric traction system 07
(b) Explain the different methods of speed control of D.C. shunt motor. 07

Q-2 (a) Explain regenerative breaking of DC motor. 07
(b) Classify the different methods for starting of 3-ph squirrel cage induction
motor. Explain DOL starter with neat sketch.
07
OR
(b) Draw and explain the torque speed characteristics of 3-ph induction
motor.
07
Q-3 (a) Define average speed ,crest speed and schedule speed and discuss the
factors which affect schedule speed of a train
07
(b) A train is required to run between two stations 1.6 km apart at an average
speed of 40 kmph. The run is to be made to a simplified quadrilateral
speed- time curve. If the maximum speed is to be limited 64 kmph,
acceleration to 2 kmphps and coasting and breaking retardation to 0.16
kmphps and 3.2 kmphps respectively, determine the duration of
acceleration, coasting and braking periods.
07
OR
(a) Explain coefficient of adhesion and factors affecting the coefficient of
adhesion.
07
(b) Draw and explain the block diagram of electric locomotive. 07

Q-4 (a) Classify electric welding and Explain resistance welding. 07


(b) Explain direct arc furnace with neat sketch and give its applications. 07
OR
(a) Explain dielectric heating .State applications of dielectric heating. 07
(b) Explain power supply for arc welding. 07

Q-5 (a) Explain process of electroplating. 07
(b) State and explain laws of illumination. 07
OR
(a) Explain fluorescent lamp with diagram. 07
(b) Explain the following terms:
1) Luminous intensity.
2) Plane angle
3) Candle power.
4) Lumen
07

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