Transmission Line MCQs | Transmission Line MCQs and Answers for competitive exams

Questions
81 Which of the following materials is not used for transmission and distribution of electrical power ?
A Copper
B Aluminium
C Steel
D Tungsten

Answer: Tungsten
82 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

Answer: All of the above
83 310 km line is considered as
A a long line
B a medium line
C a short line
D any of the above

Answer: a long line
84 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 Any of the above

Answer: Ferranti effect
85 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

Answer: Increase of short-circuit current of the system
86 The operating voltage of supertension cables is up to
A 3.3 kV
B 6.6 kV
C 11 kV
D 33 kV

Answer: 33 kV
87 Which of the following D.C. distribution system is the simplest and lowest in first cost ?
A Radial system
B Ring system
C Inter-connected system
D None of the above

Answer: Radial system
88 Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system ?
A Circulating current method
B Thevenin’s theorem
C Superposition of currents
D All of the above

Answer: All of the above
89 Most of the high voltage transmission lines in India are
A underground
B overhead
C either of the above
D none of the above

Answer: overhead
90 High voltage transmission lines use
A suspension insulators
B pin insulators
C both (a) and (b)
D none of the above

Answer: suspension insulators
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