Download GTU B.Tech 2020 Winter 7th Sem 2170910 Power Quality And Management Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2170910 Power Quality And Management Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2170910 Date:19/01/2021
Subject Name:Power Quality and Management
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.
Q.1
(a) Justify ? "Power quality is the cause, and the ability of the electrical equipment to 03
function in the power quality environment is the effect".

(b) Define: (1) Bonding (2) Coupling (3) Distortion Factor (4) Flicker
04

(c) What are the causes for the transients? Explain any one in detail.
07


Q.2
(a) What is shock? Explain in detail.
03

(b) Explain the terms individual harmonic distortion and total harmonic distortion 04
with example

(c) How isolation transformer cures the low frequency disturbances?
07




Q.3
(a) Differentiate single point grounding system and multi point grounding system.
03

(b) What are the causes of current and voltage harmonics?
04

(c) Discuss in detail about the harmonics phase rotation and phase angle relationship. 07




Q.4
(a) Define displacement power factor and true power factor in
03

(b) What are the essential elements of grounding system?
04

(c) Explain earth resistance test in detail.
07
Q.5
(a) Define: (1) Radiated emission (2) Attenuation (3) Transverse mode noise 03

(b) Justify the statement "Shielding is required to mitigate the radiated emission".
04

(c) What are the effects of harmonics on AC motors?
07



Q.6
(a) What are the advantages of power factor correction?
03

(b) Explain the use of true RMS meter.
04

(c) Draw and explain the application of synchronous condenser for power factor 07
correction.
Q.7
(a) What are the instruments are available to measure the power quality?
03

(b) Explain in detail about the triboelectricity.
04

(c) Explain cable shielding grounding method to minimize the electromagnetic 07
interference.



Q.8
(a) Explain the main steps to monitor the power quality problems at site.
03
(b) How multiple test locations determine the nature of power quality?
04
(c) Discuss the use of harmonic analyzers for measuring and recording harmonic 07
distortion data.






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