a) Galvanometer b) D.c. moving coil millivoltmeter c) D.c. moving coil ammeter d) A.c. voltmeter Ans: (b)
a) I.H.P. b) F.H.P. c) B.H.P. d) none of the above Ans: (c)
a) true c) false Ans: (a)
a) This is the unit of rating of synchronous machine b) This is the unit of torque defined at radius unit c) This is the torque, which at the synchronous speed of the machine under consideration, would develop a power of 1 watt d) This is the unit of the power when the power factor in the power equation omitted Ans: (c)
a) true c) false Ans: (a)
a) true c) false Ans: (a)
a) The equivalent load resistance is equal to the standstill reactance of the motor b) The equivalent load resistance is equal to the resistance of the rotor c) The equivalent resistance is equal to the standstill leakage impedance of the motor d) The slip is zero Ans: (c)
a) no load test b) blocked rotor test c) (a) and (b) both d) (a), (b) and stator resistance test Ans: (d)
a) true b) false Ans: (b)
a) true b) false Ans: (b)
a) Short circuit test only b) Open circuit test only c) Slip test d) Stator resistance test Ans: (a)
a) No load test only b) Short circuit test only c) Stator resistance test d) None of the above Ans: (b)
a) true b) false Ans: (a)
a) Starting torque is very high b) Motor takes five to seven times its full load current c) It will pick-up very high speed and may go out of step d) It will run in reverse direction Ans: (b)
a) Supply voltage only b) Relative velocity between flux and rotor conductors c) (a) and (b) both d) Slip Ans: (c)