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Electrical Engineering Objective Questions { Utilisation of Electrical Energy }



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

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

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

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

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

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

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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