--- Content provided by FirstRanker.com ---
Firstranker's choiceSeat No.: Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
--- Content provided by FirstRanker.com ---
BE- SEMESTER-VIII (NEW) EXAMINATION — WINTER 2020
Subject Code:2180901 Date:28/01/2021
--- Content provided by FirstRanker.com ---
Subject Name:Testing and Commissioning of Electrical EquipmentsTime:02:00 PM TO 04:00 PM Total Marks: 56
Instructions:
--- Content provided by FirstRanker.com ---
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
--- Content provided by FirstRanker.com ---
3. Figures to the right indicate full marks.Q.1 (a) What is earth resistance? Which are the factors affecting on its? 03
(b) What is different between system earthing and equipment earthing? 04
--- Content provided by FirstRanker.com ---
(c) Explain tan delta test on power transformer with help of circuit diagram. 07
Q.2 (a) Explain basic requirement of foundation. 03
--- Content provided by FirstRanker.com ---
(b) Explain procedure of alignment of shaft of electrical machine. 04(c) What is insulation resistance? How is it measured for power transformer? 07
Q.3 (a) Explain significant of polarization index. 03
--- Content provided by FirstRanker.com ---
(b) Explain polarity test of transformer. 04
(c) Write a short note on enclosure. 07
--- Content provided by FirstRanker.com ---
Q.4 (a) Draw connection of Dyl and Yd11 type transformer connection. 03
(b) Explain breakdown voltage (BDV) test of transformer oil. 04
(c) List out commissioning test of power transformer. Explain voltage ratio 07
--- Content provided by FirstRanker.com ---
test with the help of circuit diagram:
Q.5 (a) Explain any two troubles, causes and remedies of DC generator. 03
--- Content provided by FirstRanker.com ---
(b) Explain temperature risetest on rotating electrical machine. 04(c) Explain maintenance schedule of induction motor. 07
Q.6 (a) Define degree of protection of rotating electrical machine. 03
--- Content provided by FirstRanker.com ---
(b) List out the commissioning test of synchronous machine. 04
(c) Explain trouble, cause and remedies of 3 phase induction motor. 07
--- Content provided by FirstRanker.com ---
Q.7 (a) Enlist different tests to be performed on busbar. 03
(b) Write a short note on gas insulated substation. 04
(c) Explain Murry loop test for ground fault location in underground cable. 07
--- Content provided by FirstRanker.com ---
Q.8 (a) Explain any two trouble, causes and remedial measures of circuit breaker. 03
(b) Explain mechanical endurance test on circuit breaker. 04
--- Content provided by FirstRanker.com ---
(c) Write a short note on location of lighting arrester. 07--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU B.Tech 2020 Winter Question Papers || Gujarat Technological University