Download GTU BE/B.Tech 2019 Summer 8th Sem Old 180801 Testing And Installation Of Electrical Equipments And Systems Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 8th Sem Old 180801 Testing And Installation Of Electrical Equipments And Systems Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VIII (OLD) EXAMINATION ? SUMMER 2019
Subject Code: 180801 Date: 13/05/2019

Subject Name:Testing And Installation Of Electrical Equipments And
Systems

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) Explain the procedure and significance of temperature rise test with necessary
figure and its co-relation with rated normal current.
07
(b) Write any seven causes of disturbance in power quality examine their effect on
power quality and write remedies for each disturbance of electric power supply.
07

Q.2 (a) State the checks to be carried out at site prior to commissioning of electric motors. 07
(b) Describe the principle of fiber optic data transmission with necessary figure. 07
OR
(b) Define briefly the following terms in power cable:
a) Operating capacitance b) charging currents c) reactive power d) leakage
currents e) continuous current carrying capacity f) inductance g) effective d.c.
resistance.
07

Q.3 (a) What are the causes of failure of a circuit-breaker? Explain the procedure of
failure analysis.
07
(b) Explain the working principle of Megger with necessary figure and Procedure of
its use.
07
OR
Q.3 (a) What is load shedding? Why is it necessary? How is it carried out and where? 07
(b) Explain the procedure of drying out of electric motor using the (1) radiating lamp
(2) drying chambers and resistor heaters.
07

Q.4 (a) Describe the purpose, test set-up and procedure of power frequency withstand
test on power transformer.
07
(b) State and explain the types of constructions of voltage transformers and their
applications.
07
OR
Q.4 (a) Illustrate the schematic of bipolar 2-terminal HVDC link and define functioning
of all parts of it.
07
(b) Give summary of auxiliary systems in substations and state their functions. 07

Q.5 (a) Describe the second characteristic numeral in the standard designation of cooling
system.
07
(b) Prepare the sequence of tripping the main circuit-breaker, unit auxiliary circuit-
breaker and field circuit breaker in the generating unit scheme.
07
OR
Q.5 (a) Explain the seven principles of safety management in electrical plants. 07
(b) Describe the test set-up and test procedure of switching impulse test with
necessary figure.
07
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