a) 1ɸ motor b) 2r ɸ motor c) 3 ɸ motor d) All of these Ans: (c)
a) Break the fault current b) Sense the fault c) Sense the fault and direct to trip the circuit breaker d) All of these Ans: (c)
a) Equal to voltage element torque b) Greater than voltage element torque c) Less than voltage element torque d) None of these Ans: (a)
a) Transformer b) Overhead line equipment c) Alternator d) Motors Ans: (b)
a) Air gap b) Back up stop c) Number of ampere turns d) All of these Ans: (c)
a) Impedance type b) MHO type c) Reactance type d) All of these Ans: (b)
a) Inter-turn fault b) External faults c) Rotor faults d) Every internal faults Ans: (d)
a) 0.0001 sec b) 0.001 sec c) 0.01 sec d) 0.1 sec Ans: (c)
a) Directional type b) Non-directional type c) Unidirectional type d) None of these Ans: (a)
a) Load b) Internal faults c) Both (a) and (b) d) None of these Ans: (b)