Bus coupler is very essential in arrangement______________?

Related Mcqs:

1. In a single bus-bar system there will be complete shut down when____________?

   A. fault occurs on the bus itself
   B. fault occurs on neutral line
   C. two or more faults occur simultaneously
   D. fault occurs with respect to earthing

2. The arcing contacts in a circuit breaker are made of______________?

   A. copper tungsten alloy
   B. porcelain
   C. electrolytic copper
   D. aluminium alloy

3. Directional relays are based on flow of____________?

   A. power
   B. current
   C. voltage wave
   D. all of the above

4. Ionization in circuit breaker is facilitated by___________?

   A. high temperature
   B. increase of mean free path
   C. increasing field strength
   D. all of the above

5. The ground wire should not be smaller than No _________ copper

   A. 2
   B. 4
   C. 6
   D. 10

6. Induction cup relay is operated due to changes in________________?

   A. current
   B. voltage
   C. impedance
   D. all of the above

7. What will be the reflection co-efficient of the wave of load connected to transmission line if surge impedance of the line is equal to load ?

   A. Zero
   B. Unity
   C. Infinity
   D. None of the above

8. relays are used for phase faults on long line?

   A. Impedance
   B. Reactance
   C. Either of the above
   D. None of the above

9. Admittance relay is __________ relay?

   A. impedance
   B. directional
   C. non-directional
   D. none of the above

10. Protection by fuses is generally not used beyond__________?

    A. 20 A
    B. 50 A
    C. 100 A
    D. 200 A