Pole changing method of speed control is used in
A) slip ring induction motor
B) dc shunt motor
C) dc series motor
D) squirrel cage induction motor.
Correct Answer:
Verified
Q4: A class I contactor should be mechanically
Q5: Which of the following pair is used
Q6: Belted wound rotor induction motors are preferred
Q7: The cooling time constant is usually
A)equal to
Q8: A motor of less than full load
Q10: To save the energy during braking
A)dynamic braking
Q11: To get speed higher than the base
Q12: Rotor resistance speed control is used in
A)squirrel
Q13: Effect of friction torque is more pronounced
A)when
Q14: The equilibrium speed of a motor load
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