# The leakage resistance of a 50 km long cable is 1 MΩ for a 100 km long cable it will be

1.  1MΩ

2.  2MΩ

3.  0.5MΩ

4.  none of these

4

none of these

Explanation :
No Explanation available for this question

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

1.  32 m/s

2.   159.24 µ/ms

3.  0.0312 m/s

4.  159.24 m/s

4

159.24 µ/ms

Explanation :
No Explanation available for this question

# The surge impedance of 50 miles long underground cable is 50 ohm. For a 25miles length it will be

1.  25 ohms

2.   50 ohms

3.  100 ohms

4.   none of these

4

50 ohms

Explanation :
No Explanation available for this question

# For reducing tower footing resistance, it is better to use

1.  Chemical and ground rods only

2.  Chemical and counterpoise only

3.  Ground rod and counterpoise only

4.  Chemical, ground rods and counterpoise

4

Ground rod and counterpoise only

Explanation :
No Explanation available for this question

# An RLC series circuit remains predominantly inductive

1.  At resonance frequency

2.  Below resonance frequency

3.  Above resonance frequency

4.  At lower half power frequency

4

Above resonance frequency

Explanation :
No Explanation available for this question

# If corona loss on a particular system at 50 Hz is 1 KW/phase per km, then corona loss on the same system with supply frqency 25 Hz will be

1.  1 KW/phase/km

2.   0.5/phase/km

3.    0.667/phase/km

4.      none of these

4

0.667/phase/km

Explanation :
No Explanation available for this question

# If r is radius of the conductor and R is radius of the sheath of strength , then

1.  r/R >1

2.     r/R>1

3.     r/R

4.     r/R

4

r/R<0.368

Explanation :
No Explanation available for this question

# Three insulating materials with same maximum working stress and permittivity’s 2.5, 3.0, 4.0 are used in a single core cable then location of the materials with respect to the core of the cable will be

1.  2.5, 3.0, 4.0

2.     3.0 , 2.5, 4.0

3.  4.0 ,3.0 ,2.5

4.    4.0,2.5,3.0

4

4.0 ,3.0 ,2.5

Explanation :
No Explanation available for this question

# If δ is the loss angle of the cable, then its power factor is

1.  Sinδ

2.  cosδ

3.   independent of δ

4.   depends upon δ but its is not as per a and b

4

Sinδ

Explanation :
No Explanation available for this question

# For the same voltage boost, the reactive power capacity is

1.  More for shunt capacitor

2.  More for series capacitor

3.  It is same for both series and shunt

4.  Uncertain

4