engineering recuitment MAHATRANSCO AE Electrical Mock Test Electrical Machines Alternator and Synchronous Motors Synchronous Motor changing Excitation Effect
From the following three statements, which of the alternatives given is correct?
i) The V-curves of synchronous motor give relation between armature current and power inputs for different field currents.
ii) In a 3-phase alternator the ratio of phasor sum of induced e.m.fs per coil to the arithmetic sum of induced e.m.fs per coil is known as coil pitch factor.
iii) When transformer is on no load condition, the induced e.m.fs in primary and secondary windings in phase with the main flux
1
i) False ii) True iii) False
2
i) False ii) False iii) False
3
i) False ii) True iii) True
4
i) True ii) True iii) True
5
i) True ii) False iii) False