a) The power transformer b) The hydraulic motor c) The gear train arrangement d) The transmission of mechanical power by a shaft Ans: (d)
a) The angle between the rotor and the stator poles of same polarity b) The angle between the rotor and the stator poles of opposite polarity c) The angle between the rotor and the stator teeth d) None of the above Ans: (b)
a) True b) False Ans: (b)
a) True b) False Ans: (b)
a) The rotor excitation only b) The rotor excitation and speed both c) The rotor speed only d) The coupling angle only Ans: (a)
a) The stator current will be very high b) The stator current will be zero c) The stator current will be very small d) The back e.m.f. will be more than the supply voltage Ans: (b)
a) The supply voltage only b) The rotor excitation only c)The rotor excitation and supply voltage both d) The rotor excitation, supply voltage and maximum value of coupling angle (90 degree) Ans: (d)
a) Has large values for low excitation only b) Has large values for high excitation only c) Has large values for low and high excitation d) Has large current for low lagging excitation Ans: (c)
a) Corresponds to 0.8 power factor b) Corresponds to zero power factor c) Corresponds to 0.866 power factor d) Corresponds to unity power factor Ans: (d)
a) True b) False Ans: (a)
a) True b) False Ans: (a)
a) The motor will run at its normal speed b) The motor will just crawl c) The motor will run as induction motor d) The armature will burn because there is no back e.m.f. in the armature Ans: (c)
a) True b) False Ans: (a)
a) Convert a.c. to d.c. b) Convert d.c. to a.c. c) Convert liner motion to rotary motion d) (a) and (b) both Ans: (d)
a) True b) false Ans: (a)