92. If the receiving-end voltage and current are numerically equal to the corresponding sending-end values, that is, I Vs I = I VR al!cl I Is = 'RI' then such a line is called
A. an infinite line
B. a natural line
C. a tuned line
D. a loss-less line

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93. The convergence characteristics of the Netwon-Rophson method for solving a load flow problem is
A. quadratic
B. linear
C. geometric
D. cubic

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94. In HVDC transmission system, rectifier firing angle alpha is kept near
A.0
B.150
C.300
D.900

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95. The insulation resistance of a single-core cable is 200 Mil/km. The insulation resistance for 5 km length is
A. 40 Iv111
B. 1000 NIS.2
C. 200 MS-1
D. 8 Mil

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96. Installation of capacitors at suitable locations and of optimum size in a distribution system results in 1. improved voltage regulation. 2. reduction in distribution power losses 3. reduction of kVA rating of distribution transformers Select the correct answer from the codes given below :
A. 1 alone
B. 1 and 2
C. 1,2 and 3
D. 3 alone

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97. Normally ZBus matrix is a
A. Null matrix
B. Sparse matrix
C. Full matrix
D. Unity matrix

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98. Consider the following statements with respect to an interconnected power system : 1. Frequency will be same at all buses in the system. 2. Voltages can be different at differen buses. 3. Both frequency and voltage can be different at different buses. Which of these statements are correct?
A. I, 2 and 3
B. 1 and 3
C. I and 2
D. 2 and 3

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