Question

8
Q6.
DC shunt motors are not suitable for traction services because of their
O (A) Hard Characteristics
O (B) Large time Constant
O (C) Power Varying directly with developed torque
O (D) All of the above
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Answer 1

A DC shunt motor is not suitable for traction services because of d. All of the above.

• Dc motors have hard characteristics and are also not reliable for low speed operations.
• The motors have a wide time constant making it further a poor choice for traction services.
• Since they operate at a motor of constant speed, it is unfavourable to operate is under a variable speed as well.

Answer 2

Answer:

(D) All of the above.

Hope it helps you...