# Download JNTUA B.Tech 4-2 R13 2018 July Supple 13A02805 Design of Electrical Systems Question Paper

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Code: 13A02805

B.Tech IV Year II Semester (R13) Advanced Supplementary Examinations July 2018
DESIGN OF ELECTRICAL SYSTEMS
(Electrical and Electronics Engineering)

Time: 3 hours Max. Marks: 70

PART ? A
(Compulsory Question)

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1 Answer the following: (10 X 02 = 20 Marks)
(a) What is electrical wiring?
(b) What are high-rise building?
(c) What are the earthing conductor materials?
(d) What are the factors to be considered while selection of switch gear.
(e) Why the frame of every electrical machinery is earthed.
(f) State different types of earthing.
(g) What do you mean by risk management?
(h) What are the phases of design process for lightning protection systems?
(i) Define uniform series compound amount.
(j) What is future worth of a uniform series of amounts?

PART ? B
(Answer all five units, 5 X 10 = 50 Marks)

UNIT ? I

2 Compare power distribution in small and large buildings.
OR
3 What are the tests to be carried out after completion of a domestic wiring before the supply can be
switched on? How will you check the correct installation of the switches?

UNIT ? II

4 Explain in detail about the importance protection coordination.
OR
5 Explain the role circuit breakers and their selection for protection of circuit elements and persons.

UNIT ? III

6 Explain with the help of diagram, the measurement of earth resistance.
OR
7 Discuss in detail about the design consideration of earthing.

UNIT ? IV

8 Explain the installation of down conductor with necessary schematic diagrams.
OR
9 Write short notes on ?Lightning Protection Zones?.

UNIT ? V

10 Illustrate with an example of Uniform Series Compound Present Worth Model (USPW).
OR
11 Write short notes on the following:
(a) Tax consideration.
(b) After tax analysis.

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R13
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