# A 3- phase, 11 kV, 50 Hz, 200 kW load has a power factor of 0.8 lag. A delta connected 3-phase capacitor is used to improve the power factor to unity. The capacitor in micro-farads is

1.  3.948

2.  1.316

3.  0.439

4.  11.844

4

1.316

Explanation :
No Explanation available for this question

# A transmission line has equal voltages at the two ends, maintained constant by two sources. A third source is to be provided to maintain constant voltage (equal to end voltages) at either the midpoint of the line or at 75% of the distances from the sending end. Then the maximum power transfer capabilities of the line in the original case and the other two cases respectively will be in the following ratios.

1.  1:1:1

2.  1:2:1/0.75

3.  1:2:4

4.  1:4:6

4

1:2:1/0.75

Explanation :
No Explanation available for this question

# The corona loss on a particular system at 50Hz is 1 kW/Km per phase. The corona loss at 60 Hz would be

1.  1 kW/km per phase

2.  0.83 kW/km per phase

3.  1.2 kW/km per phase

4.  1.13 kW/km per phase

4

1.13 kW/km per phase

Explanation :
No Explanation available for this question

# The insulation resistance of a cable of length 10 km is 1 MΩ. For a length of 100 km of the same cable, the insulation resistance will be

1.  1 MΩ

2.  10 MΩ

3.  0.1 MΩ

4.  0.01 MΩ

4

0.1 MΩ

Explanation :
No Explanation available for this question

# A cable has the following characteristics. L = 0.201μH/m and C = 196.2 p/F/m. The velocity of wave propagation through the cable is

1.  32 m/s

2.  159.24 μ/ms

3.  0.0312 m/s

4.  159.24 m/(μ-s)

4

159.24 m/(μ-s)

Explanation :
No Explanation available for this question

# The selection of size of conductors for a distributor in a distribution system is governed by

1.  Corona loss

2.  Temperature rise

4.  Voltage drop

4
Voltage drop
Explanation :
No Explanation available for this question

# In order to have a lower cost of electrical energy generation

1.  The load factor and diversity factor should be low

2.  The load factor should be low but diversity factor should be high

3.  The load factor should be high but diversity factor should be low

4.  The load factor and diversity factor should be high

4
The load factor and diversity factor should be high
Explanation :
No Explanation available for this question

# An industrial consumer has a daily load pattern of 2000 kW, 0.8 lag for 12 Hrs and 1000 kW UPF for 12 Hrs. The load factor is

1.  0.5

2.  0.75

3.  0.6

4.  2.0

4
0.75
Explanation :
No Explanation available for this question

# For a fault at the terminals of a synchronous generator, the fault current is maximum for a

1.  3- phase fault

2.  3- phase to ground fault

3.  Line to ground fault

4.  line to line fault

4

Line to ground fault

Explanation :
No Explanation available for this question

# For an unbalanced fault, with paths for zero sequence currents, at the point of fault

1.  The negative and zero sequence voltages are minimum

2.  The negative and zero sequence voltages are maximum

3.  The negative sequence voltage is minimum and zero sequence voltage is maximum

4.  The negative sequence voltage is maximum and zero sequence voltage is minimum

4