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Answer :

Buses, trains, trolleys, hoists, cranes require high starting torque and therefore make use of D.C. series motor.

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Description : Why a dc series motor has a high starting torque?

Description : Why high starting torque is required?

Answer : For the same H.P. rating and full load speed, following motor has poor starting torque differentially compounded.

Description : In a double squirrel cage induction motor, good starting torque is produced as (A) Large current flows through the outer high resistance winding. (B) Large current flows through the inner high ... the outer high resistance winding. (D) Large current flows through the inner low resistance winding.

Answer : In a double squirrel cage induction motor, good starting torque is produced as Large current flows through the outer high resistance winding.

Answer : The ratio of starting torque to full-load torque is least in case of shunt motors.