1000+ Electrical Machines Quiz Questions and Answers Pdf - 1

Question: 1

In a dc machine

(A) the current and emf in armature conductors are alternating while those at the terminals are unidirectional

(B) the emf in armature conductors and at the terminals is alternating while current is unidirectional

(C) the current and emf in armature conductors and at the terminals are unidirectional

(D) the current and emf in armature conductors are unidirectional while those at the terminals are alternating

Question: 2

No load saturation characteristics are plotted between

(A) short circuit current and armature current

(B) no load voltage and armature current

(C) short circuit current and armature current

(D) no load voltage and field current

Question: 3

In which of the following DC Motor the ratio of starting torque to full load torque is minimum?

(A) shunt motor

(B) series motor

(C) differential compound motor

(D) cumulative compound motor

Question: 4

For which of the following loads, armature reaction is magnetizing in nature?

(A) pure capacitive load

(B) pure resistive load

(C) pure inductive load

(D) none of the above

Question: 5

An electric motor with constant output power will have a torque speed characteristics in the form of

(A) rectangular hyberbola

(B) straight line through the origin

(C) straight line parallel to the speed axis

(D) circle about the origin