# 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

# For a given power delivered, if the working voltage of a distributor line is increased to n times, the cross sectional area A of the distribution line, would be reduced to

1.  1/n A

2.    1/n2 A

3.    1/2n2 A

4.   1/2n A

4

1/nA

Explanation :
No Explanation available for this question

# The single phase line of 230 V and 3-phase line of 400 V which feed different domestic circuits and industrial loads represent

1.  Primary distribution

2.  Secondary distribution

3.  Secondary transmission

4.  None of these

4

Secondary distribution

Explanation :
No Explanation available for this question

# The transmission feeding power on either side of the main transmission line is called

1.  Secondary distribution

2.  Secondary transmission

3.  Primary transmission

4.  Primary distribution

4

Secondary transmission

Explanation :
No Explanation available for this question

# Series capacitive compensation on EHV transmission line is used to

2.  Improve the stability of the system

3.  Reduce the voltage profile

4.  Improve the protection of the line

4

Improve the protection of the line

Explanation :
No Explanation available for this question

# When a Dc source is switched is purely inductive, the current response is

1.  An exponentially raising curve

2.  An exponentially decaying curve

3.  A straight line passing through the origin

4.  A straight line offset from the origin

4

A straight line passing through the origin

Explanation :
No Explanation available for this question

# At a particular unbalanced node, the real powers specified are Leaving the node: 20 MW, 25MW Entering the node : 60 MW, 30 MW The balance power will be

1.  30 MW leaving the node

2.  45 MW leaving the node

3.  45 MW entering the node

4.  22.5 MW entering and leaving the node

4

45 MW leaving the node

Explanation :
No Explanation available for this question

# If a transformer frequency is changed from 50 Hz to 60 Hz. The ratio of eddy current loss 60 Hz to 50 Hz at constant voltage will be

1.  5/6

2.    25/36

3.  6/5

4.    1

4

1

Explanation :
No Explanation available for this question

# In a load flow analysis the load connected at a bus is represented as

1.  Constant current draw from the bus

2.  Constant impedance connected at the bus

3.  Voltage and frequency dependent source at the bus

4.  Constant real and reactive drawn from the bus

4

Constant real and reactive drawn from the bus

Explanation :
No Explanation available for this question

# If the reference bus is changed in two load flow runs with same system data and power obtained for reference bus taken as P and Q in a latter run

1.  The system losses will be unchanged but complex bus voltage will change

2.  The system losses will be changed but complex bus voltage will unchanged

3.  The system losses will be changed and complex bus voltage will change

4.  The system losses will be unchanged and complex bus voltage will unchanged

4