# A conductor is composed of seven identical copper strands, each having a radius r. The self GMD of the conductors will be

1.  2.177 r

2.  2.645 r

3.  2.141 r

4.  1.21 r

4

2.177 r

Explanation :
No Explanation available for this question

# The closed-loop transfer function of a control system is given by C(s)/R(s)= 2(s - 1)/(s + 2)(s + 1) For a unit step input the output is

1.   - 3e-2t +4e-t -1

2.  - 3e-2t-4e-t + 1

3.  zero

4.  infinity

4

- 3e-2t +4e-t -1

Explanation :
No Explanation available for this question

# The position and velocity error coefficient for the system of transfer function G(s) =50 /(1+ 0.1s) (1 + 2s) respectively are

1.  zero and zero

2.  zero and infinity

3.  50 and zero

4.  50 and infinity

4

50 and zero

Explanation :
No Explanation available for this question

# What is the charging current per km, when the transmission line is operating at 264 kV

1.  0.312 A/km

2.  0.257 A/km

3.  0.4272 A/km

4.  0.2136 A/km

4

0.4272 A/km

Explanation :
No Explanation available for this question

# The transfer function of a system is 10/1 + s. When operated as a unity feedback system, the no state error to a unit step input will be

1.  zero

2.  1/11

3.  10

4.  infinity

4

1/11

Explanation :
No Explanation available for this question

# A3-Φ load of 750 kW at 400 V, 50 Hz, operates at a power factor of 0.7 lagging. What is the capacitance per phase of a mesh connected capacitor bank to improve the power factor to 0.95 lagging

1.  3040 F

2.  2500 F

3.  3438 F

4.  2789 F

4

3438 F

Explanation :
No Explanation available for this question

# What is the time of operation of a relay of rating 5 amp 2.2 sec, IDMT and having a relay setting of 125% Tms = 0.6 It is connected to a supply circuit through a CT, 400 ratio. The fault current is 4000 amp.

1.  10.0 sec

2.  1.92 sec

3.  4.5 sec

4.  2.4 sec

4

1.92 sec

Explanation :
No Explanation available for this question

# A two conductor 1- line operates at 50 Hz. The diameter of each conductor is 2 cm and are spaced 3m apart. What is the line to line capacitance ?

1.  9.74 X 10-9 F/km

2.  4.87 X 10-9 F/km

3.  3.05 x 10-9 F/km

4.   None of these

4

4.87 X 10-9 F/km

Explanation :
No Explanation available for this question

# A two conductor 1-π line operates at 50 Hz. The diameter of each conductor is 4 cm and are spaced 6 m apart. What is the capacitive susceptance to neutral per km

1.  1.42 x 10-9 s/km

2.  3.25 x 10-8 s/km

3.  4.8 x 10-9 s/km

4.  3.06 x 10-9 s/km

4

3.06 x 10-9 s/km

Explanation :
No Explanation available for this question

1.  51.07 kVAr

2.  51.70 kVAr

3.  40.0 kVAr

4.  60.516 kVAr

4