In a substation the following equipment is not installed?

Related Mcqs:

1. 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

2. Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical?

   A. Static condenser
   B. Synchronous condenser
   C. Tap changing transformer
   D. Booster transformer

3. 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

4. By which of the following methods string efficiency can be improved?

   A. Using a guard ring
   B. Grading the insulator
   C. Using long cross arm
   D. Any of the above
   E. None of the above

5. 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

6. On which of the following factors skin effect depends?

   A. Frequency of the current
   B. Size of the conductor
   C. Resistivity of the conductor material
   D. All of the above

7. 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

8. 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

9. 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

10. 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