# Synchronous Motor Multiple Choice Questions and Answers

26. The maximum value of torque that a synchronous motor can develop without losing its synchronism, is known as

A.Slip torque

B.Pull-out torque

C.Breaking torque

D.Synchronous torque

✔ View Answer

D.Synchronous torque

✍ Your Comments

Your name:

Your Email:

Your Comments:

27. At no-load, the armature current in a synchronous motor

A.In Zero

B.Lags the applied voltage by 900

C.Leads the applied voltage by 900

D.Is in phase with the applied voltage

E.None of the above

✔ View Answer

C.Leads the applied voltage by 900

✍ Your Comments

Your name:

Your Email:

Your Comments:

28. In a synchronous motor, the breakdown torque is

A.Directly proportional to applied voltage

B.Directly proportional to the square of the applied voltage

C.Inversely proportional to applied voltage

D.None of the above

✔ View Answer

A.Directly proportional to applied voltage

✍ Your Comments

Your name:

Your Email:

Your Comments:

29. Exciters of synchronous machines are

A.D.C. shunt machines

B.D.C. series machines

C.D.C. compound machines

D.Any of the above

✔ View Answer

A.D.C. shunt machines

✍ Your Comments

Your name:

Your Email:

Your Comments:

30. If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then

A.The stator current will be zero

B.The stator current will be very small

C.The stator current will be very high

D.The back e.m.f. will be more than the supply voltage

E.None of the above

✔ View Answer

A.The stator current will be zero

✍ Your Comments

Your name:

Your Email:

Your Comments: