On which of the following factors skin effect depends?
On which of the following factors skin effect depends?
A. Frequency of the current
B. Size of the conductor
C. Resistivity of the conductor material
D. All of the above
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By which of the following systems electric power may be transmitted ?
By which of the following systems electric power may be transmitted ?
A. Overhead system
B. Underground system
C. Both A. and (b)
D. None of the aboveTransmitted power remaining the same, if supply voltage of a D.C. 2-wire feeder is increased 100 percent, saving in copper is____________________?
Transmitted power remaining the same, if supply voltage of a D.C. 2-wire feeder is increased 100 percent, saving in copper is____________________?
A. 25 percent
B. 50 percent
C. 75 percent
D. 100 percentThe skin effect of a conductor will reduce as the__________?
The skin effect of a conductor will reduce as the__________?
A. resistivity of conductor material increases
B. permeability of conductor material increases
C. diameter increases
D. frequency increasesThe spacing between phase conductors of a 220 kV line is approximately equal to________________?
The spacing between phase conductors of a 220 kV line is approximately equal to________________?
A. 2 m
B. 3.5 m
C. 6 m
D. 8.5 mWhich of the following distribution systems is more reliable?
Which of the following distribution systems is more reliable?
A. Radial system
B. Tree system
C. Ring main system
D. All are equally reliableWhich of the following D.C. distribution system is the simplest and lowest in first cost ?
Which of the following D.C. distribution system is the simplest and lowest in first cost ?
A. Radial system
B. Ring system
C. Inter-connected system
D. None of the above