Transmission And Distribution Part 9
Category –EE Online Test
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Attempt Free Transmission And Distribution Part 9 Here. Read The Important Electrical MCQ From Below.
Q1. A.C.S.R. conductor having 7 steel stands surrounded by 25 aluminum conductors will be specified as
A. 25/7
B. 50/15
C. 7/25
D. 15/50
Ans. A
Q2. By using bundled conductors which of the following is reduced ?
A. Power loss due to corona
B. Capacitance of the circuit
C. Inductance of the circuit
D. None of the above
Ans. A
Q3. The string efficiency of an insulator can be increased by
A. correct grading of insulators of various capacitance’s
B. reducing the number of strings
C. increasing the number of strings in the insulator
D. none of the above
Ans. A
Transmission And Distribution Part 9
Q4. Earthing is necessary to give protection against
A. danger of electric shock
B. voltage fluctuation
C. overloading
D. high temperature of the conductors
Ans. A
Q5. If variable part of a.nnual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as
A. Kelvin’s law
B. Ohm’s law
C. Kirchhoffs law
D. Faraday’s law
Ans. A
Q6. 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
Ans. A
Transmission And Distribution Part 9
Q7. 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
Ans. A
Q8. High voltage transmission lines use
A. suspension insulators
B. pin insulators
C. both (a) and (b)
D. none of the above
Ans. A
Q9. Transmission line insulators are made of
A. glass
B. porcelain
C. iron
D. P.V.C.
Ans. B
Q10. As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only
A. 31.25 percent of copper
B. 33.3 percent of copper
C. 66.7 percent of copper
D. 125 percent of copper
Ans. A
