# The order of the sub-harmonic during SSR for 50 Hz nornal frequency is

1.  25Hz

2.  16 2/3 Hz

3.  10Hz

4.  none of these

4

none of these

Explanation :
No Explanation available for this question

# Whenever the are dead-ended of there is a change in the direction of transmission line, the insulators used are of the

1.  pin type

2.  suspension type

3.  strain type

4.   shackle type

4

strain type

Explanation :
No Explanation available for this question

# The time taken for a surge to travel a 600 km long overhead transmission line is

1.  6s

2.  1s

3.  0.02s

4.  0.002s

4

Explanation :
No Explanation available for this question

# A balanced 3-phase, 3-wire supply feeds balanced star connected resistors. If one of the resistors is disconnected, then the percentage reduction in load will be

1.  331/2

2.  50

3.  66 2/3

4.  75

4

66 2/3

Explanation :
No Explanation available for this question

# A long overhead transmission line is terminated by its characteristic impedance. Under this operating condition, the ratio of the voltage to the current at different points along the line will

1.  progressively increase from the sending-end to the receiving end

2.  progressively increase from the receiving end to the sending-end

3.  remain the same at the two ends, but be higher between the two ends beings maximum at the centre of the line

4.   remain the same at all points

4

remain the same at all points

Explanation :
No Explanation available for this question

# For a transmission line with negligible losses, the lagging reactive power (VAR) delivered at the receiving end, for a given receiving end voltage, is directly proportional to the

1.  square of the line voltage drop

2.  line voltage drop

3.  line inductive reactance

4.  line capacitive reactance

4

line voltage drop

Explanation :
No Explanation available for this question

# Corona loss can be reduced by the use of hollow conductors because

1.  the current density is reduced

2.  the eddy Current in the conductor is eliminated

3.  for a given cross-section; the radius of the conductor is increased

4.   of better ventilation in the Conductor

4

for a given cross-section; the radius of the conductor is increased

Explanation :
No Explanation available for this question

# Shunt compensation in an EHV line is used

1.  improve stability

2.  reduce fault level

3.  improve the voltage profile

4.  subsitute for synchronous phase modifier

4

subsitute for synchronous phase modifier

Explanation :
No Explanation available for this question

# In a 3-core extra-high voltage Cable, a metallic screen around each core-insulation. is provided to

1.  facilitate heat dissipation

2.  give mechanical strength

4.  obtain longitudinal electric stress

4

Explanation :
No Explanation available for this question

1.  1/n A

2.  1/n2A

3.  1/2n A

4.   1/2n A

4