Electrical Machines In DC machine torque depends on which of the following? flux (φ) both A and B speed armature current (I) flux (φ) both A and B speed armature current (I) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding the speed control of dc motors : 1. ward-leonard method is suitable forconstant-torque drives 2. Ward-leonard method is suitable for constant-power drives 3. field-control method facilitates speed control below base speed 4. Armature-resistance control method is more efficient than ward-leanard method 5. Field-control method is suitable for constant-torque drives 6. Armature-resistance control method is suitable for constant-torque drives From these, the correct answer is 1, 4, 6 1, 2, 5 1, 3, 5 1, 2, 6 1, 4, 6 1, 2, 5 1, 3, 5 1, 2, 6 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Width of a carbon brush should be equal to less than the width of commutator segment. the width of the 2 to 3 commutator segment. the width of the 1 to 2 commutator segment. the width more than 3 commutator segment. less than the width of commutator segment. the width of the 2 to 3 commutator segment. the width of the 1 to 2 commutator segment. the width more than 3 commutator segment. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dynamic braking can be used for series motors. shunt motors. compound motors. All of these series motors. shunt motors. compound motors. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 6 pole DC machine, 90 mechanical degrees correspond to which of the following electrical degree? 180. 45. 270. 30. 180. 45. 270. 30. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An auto transformer having a transformation ratio of 0.8 supplies a load pf 10 KW. The power transfered inductively from the primary to secondary is 8 KW. 0. 10 KW. 2 KW. 8 KW. 0. 10 KW. 2 KW. ANSWER DOWNLOAD EXAMIANS APP
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