The distributors for residential areas are______________?
The distributors for residential areas are______________?
A. single phase
B. three-phase three wire
C. three-phase four wire
D. none of the above
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If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as___________________?
If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as___________________?
A. Kelvin’s law
B. Ohm’s law
C. Kirchhoffs law
D. Faraday’s law
E. none of the aboveIn a tap changing transformer, the tappings are provided on__________?
In a tap changing transformer, the tapgs are provided on__________?
A. primary winding
B. secondary winding
C. high voltage winding
D. any of the aboveBy 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 aboveWhich of the following is not a constituent for making porcelain insulators ?
Which of the following is not a constituent for making porcelain insulators ?
A. Quartz
B. Kaolin
C. Felspar
D. SilicaPin type insulators are generally not used for voltages beyond_________?
type insulators are generally not used for voltages beyond_________?
A. 1 kV
B. 11 kV
C. 22 kV
D. 33 kVThe 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 m