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
Series capacitors on transmission lines are of little use when the load VAR requirement is___________?
A. large
B. small
B. fluctuating
D. any of the above
Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical?
A. Static condenser
B. Synchronous condenser
C. Tap changing transformer
D. Booster transformer
The operating voltage of extra high tension cables is upto_______________?
A. 6.6 kV
B. 11 kV
C. 33 kV
D. 66 kV
E. 132 kV
Owing to skin effect:
A. current flows through the half cross-section of the conductor
B. portion of the conductor near the surface carries more current and core of the conductor carries less current
C. portion of the conductor near the surface carries less current and core of the conductor carries more cur¬rent
D. any of the above
E. none of the above
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
The material commonly used for sheaths of underground cables is______________?
A. lead
B. rubber
C. copper
D. iron