Power Systems - Interview Questions | Exam2Win

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81. In a 3-core extra-high voltage cable, a metallic screen around each core�i,..ulation i. provided to

A. facilitate heat dissipation

B. give mechanical strength

C. obtain radial electric stress

D. obtain longtiudinal electric stress

Explanation:

82. Corona loss can be reduced by the use of hollow conductors because

A. the current density is reduced

B. the eddy current in the conductor is eliminated

C. for a given cross-section, the radius of the conductor is increased

D. of better ventilation in the conductor

Explanation:

83. Series capacitive compensation on EHV transmission lines is used to

A. reduce the line loading

B. improve the stability of the system

C. reduce the voltage profile

D. improve the protection of the line

Explanation:

84. The transmission line feeding power on either side of the main transmission line i. called

A. Secondary distribution

B. Secondary transmission

C. Primary transmission

D. Primary distribution

Explanation:

85. A square matrix is called singular if its

A. determina is unity

B. determinant is zero

C. determinant is infinity

D. rank is unity

Explanation: