Download GTU BE/B.Tech 2019 Summer 8th Sem Old 180901 Commissioning Of Electrical Equipments Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 8th Sem Old 180901 Commissioning Of Electrical Equipments Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VIII (OLD) EXAMINATION ? SUMMER 2019
Subject Code: 180901 Date: 15/05/2019

Subject Name: Commissioning of Electrical Equipments

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) Define Routine test & Type test. List out the different types of routine test
performed on power transformer.
07
(b) Explain polarity test of 3-phase transformer. 07

Q.2 (a) Define polarization index number. Which information is available from it? 07
(b) Explain the drying out procedure of static machine. 07
OR
(b) Explain the mechanical endurance test performed on circuit breaker. 07

Q.3 (a) List out the different types of test performed on D.C. Machine to know the
performance of it. Explain any Swinburne?s test.
07
(b) Explain the speed control methods of 3-phase induction motor. 07
OR
Q.3 (a) Explain the High voltage test of power transformer. 07
(b) Explain the test for measurement of insulation resistance of 3-phase power
transformer.
07

Q.4 (a) Explain Hopkinson?s test of d.c. machine 07
(b) Explain the temperature rise test of 3-phase induction motor. 07
OR
Q.4 (a) Explain the different methods to measure the earth resistance. 07
(b) State the conditions of parallel operation of two alternators. Explain the dark
lamp method with circuit diagram.
07

Q.5 (a) Explain different methods of cooling of power transformer. 07
(b) Explain the Murry-Loop Test for the location of cable fault. 07
OR

Q.5 (a) Define slip of an induction motor. Explain the different methods to measure the
slip of an induction motor.
07
(b) Define burden of a CT. Explain how polarity test is carried out on CT? 07

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