_______________are the conductors, which connect the consumer’s terminals to the distribution?
(A) Distributors
(B) Service mains
(C) Feeders
(D) None of the above
When a live conductor of public electric supply breaks down and touches the earth which of the following will happen?
(A) Current will flow to earth
(B) Supply voltage will drop
(C) Supply voltage will increase
(D) No current will flow in the conductor
(D) None of the above
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 increases
The following system is not generally used?
(A) 1-phase 3 wire
(B) 1-phase 4 wire
(C) 3-phase 3 wire
(D) 3-phase 4 wire
When a conductor carries more current on the surface as compared to core, it is due to___________?
(A) permeability variation
(B) corona
(C) skin effect
(D) unsymmetrical fault
(D) none of the above
The operating voltage of high voltage cables is up to_______________?
(A) l.lkV
(B) 3.3kV
(C) 6.6kV
(D) llkV
Which of the following is the demerit of a ‘constant voltage transmission system’ ?
(A) Increase of short-circuit current of the system
(B) Availability of steady voltage at all loads at the line terminals
(C) Possibility of better protection for the line due to possible use of higher terminal reactants
(D) Improvement of power factor at times of moderate and heavy loads
(D) Possibility of carrying increased power for a given conductor size in case of long-distance heavy power transmission
The square root of the ratio of line impedance and shunt admittance is called the___________?
(A) surge impedance of the line
(B) conductance of the line
(C) regulation of the line
(D) none of the above
The phenomenon qf rise in voltage at the receiving end of the open-circuited or lightly loaded line is called the________________?
(A) Seeback effect
(B) Ferranti effect
(C) Raman effect
(D) none of the above
310 km line is considered as_______________?
(A) a long line
(B) a medium line
(C) a short line
(D) any of the above