Relay | Protective Relay Objective Type Questions and answers

6.  The relay used for phase fault protection of short transmission lines is

   A. Reactance relay

   B. Impedance relay

   C. Mho relay

   D. IDMT relay

7.  Where severe synchronising swing occur, the relay employed is

   A. Impedance relay

   B. Mho relay

   C. Reactance relay

   D. Induction relay

8.  For the protection of lines against faults involving variable fault resistance, the preferred relaying scheme is a

   A. Plain impedance relay

   B. Directional over-current relay

   C. Mho relay

   D. Reactance relay

9.  For ground fault we prefer

   A. Plain impedance relay

   B. Directional over current relay

   C. Mho relay

   D. Reactance relay

10.  Admittance relay

   A. Nondirectional relay

   B. Directional relay

   C. Differential relay

   D. None of the above

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