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Exam Details

ESE (IES) Electrical Engineering P2 2015

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Questions 120
Duration 180 mins
Package ESE & GATE EE - Previous Year Papers

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Difficulty distribution

Medium 93 77.5%
Hard 16 13.3%
Easy 11 9.2%

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Multiple Choices 120 100%

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1
2015 · Unclassified
ESE (IES) Electrical Engineering P2 2015
A 2000/200 V, 50 Hz single-phase transformer has an exciting current of 0.5 A and a core-loss of 600 W, When H.V. side is energized by the rated voltage and frequency, the magnetizing current is
A
0.1 A
B
0.2 A
C
0.3 A
D
0.4 A
2
2015 · Unclassified
ESE (IES) Electrical Engineering P2 2015
A 250 kVA, 11000 V / 400 V and 50 Hz single-phase transformer has 80 turns on the secondary, what is the maximum value of flux?
A
24.75mWb
B
0.2mWb
C
22.5mWb
D
55.2mWb
3
2015 · Unclassified
ESE (IES) Electrical Engineering P2 2015
In a normal operation of 400 V, 50 Hz transformer, the total iron loss is 2500 W. when the supply voltage and frequency are reduce to 200 V and 25Hz respectively, the corresponding loss is 850W. The eddy-current loss at normal voltage
A
400 W
B
800 W
C
1600 W
D
200 W
4
2015 · Unclassified
ESE (IES) Electrical Engineering P2 2015
A magnetic circuit has 150 turns-coil, the cross-sectional area and the length of the magnetic circuit What are the values of magnetic field intensity and relative permeability when the current is 2 A and total flux is 0.3*10-3 ?

A
1200 AT/m and 397.9
B
300 AT/m and 397.9
C
1200 AT/m and
D
300 AT/m and
5
2015 · Unclassified
ESE (IES) Electrical Engineering P2 2015
A 240 V/120 V, 12 kVA auto-transformer has 96.2% efficiency at full-load and unity power-factor. The full-load efficiency at 0.85 pf lagging when connected to a load across 360V would be
A
0.895
B
0.928
C
0.985
D
0.889
6
2015 · Unclassified
ESE (IES) Electrical Engineering P2 2015
The percentage resistance and reactance of a transformer are 2% and 4% respectively. The approximate regulation on full load at 0.8pf lag is
A
0.12
B
0.08
C
0.06
D
0.04