MCQs
Dc Motors
Total Questions : 240
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Answer: Option D. -> Variable losses = constant losses
Answer: Option D. -> Burn due to heat produced in the field winding by eddy currents
Answer: Option B. -> Increasing the resistance in field circuit
Answer: Option A. -> Constant torque drive
Answer: Option D. -> To restrict armature current as there is no back e.m.f. while starting
Answer: Option A. -> Independent of Ia
Answer: Option D. -> Flux is practically constant in D.C. shunt motors
Answer: Option A. -> Up to 5 H.P.
Answer: Option B. -> Shunt motors
Answer: Option B. -> It limits the starting current to a safe value