Transmission and Distribution

Which of the following methods is used for laying of underground cables ?

A. Direct laying
B. Draw-in-system
C. Solid system
D. All of the above

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

The operating voltage of supertension cables is up to_________________?

A. 3.3 kV
B. 6.6 kV
C. 11 kV
D. 33 kV

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
E. 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

Which of the following are the constants of the transmission lines ?

A. Resistance
B. Inductance
C. Capacitance
D. All of the above

The corona is considerably affected by which of the following _______________?

A. Size of the conductor
B. Shape of the conductor
C. Surface condition of the conductor
D. All of the above