A. Using a guard ring
B. Grading the insulator
C. Using long cross arm
D. Any of the above
E. None of the above
Related Mcqs:
- Which of the following methods is used for laying of underground cables ?
A. Direct laying
B. Draw-in-system
C. Solid system
D. All of the above - 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. Direct application of Kirehhoffs laws
E. All of the above - Which of the following characteristics should the line supports for transmission lines possess?
A. Low cost
B. High mechanical strength
C. Longer life
D. All of the above - By which of the following a bus-bar is rated?
A. Current only
B. Current and voltage
C. Current, voltage and frequency
D. Current, voltage, frequency and short time current - For which of the following equipment current rating is not necessary?
A. Circuit breakers
B. Isolators
C. Load break switch
D. Circuit breakers and load break switches - Constant voltage transmission entails the following disadvantage?
A. large conductor area is required for same power transmission
B. short-circuit current of the system is increased
C. either of the above
D. none of the above - The following system is not generally used?
A. 1-phase 3 wire
B. 1-phase 4 wire
C. 3-phase 3 wire
D. 3-phase 4 wire - By which of the following systems electric power may be transmitted ?
A. Overhead system
B. Underground system
C. Both A. and (b)
D. None of the above - 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
E. Possibility of carrying increased power for a given conductor size in case of long-distance heavy power transmission - Which of the following is not a constituent for making porcelain insulators ?
A. Quartz
B. Kaolin
C. Felspar
D. Silica
