Salient pole type alternators are generally used on? Mark as favorite Copy Link low voltage alternators hydrogen cooled prime movers high speed prime movers low and medium speed prime movers Check Answer
In an alternator short pitch coils are used? Mark as favorite Copy Link to reduce the stray losses to reduce the size of the machine to provide accurate phase difference of 120ยบ between each phase reduce the harmonics in generated e.m.f. Check Answer
Which of the following organisations is engaged in the manufacture of large size alternators for power plants in India? Mark as favorite Copy Link Department of Science and Technology Electricity Authority of India National Thermal Power Corporation Ltd Bharat Heavy-Electricals Ltd. Check Answer
Modern 3-phase alternator of a central power station will have generated voltage of? Mark as favorite Copy Link 132 k7 11 kV 400 V 230 V Check Answer
Salient pole type alternators are generally used on? Mark as favorite Copy Link low voltage alternators hydrogen cooled prime movers high speed prime movers low and medium speed prime movers Check Answer
The rotor preferred for alternators applied to hydraulic turbines are? Mark as favorite Copy Link salient pole type cylindrical rotor type solid rotor type any of the above Check Answer
When a three-phase alternator supplies capacitive load, armature reaction flux will be? Mark as favorite Copy Link opposing the main magnetic field helping the main magnetic field either (a) or (b) none of the above Check Answer
Two alternators ‘1’ and ‘2’ are-sharing’ an inductive load equally. If the excitation of alternator ‘1’ is increased? Mark as favorite Copy Link alternator '2' will deliver less current and alternator 'l' will deliver more current alternator '2' will deliver more current and alternator '1' will deliver less current both will deliver more current both will continue to share load equally Check Answer
In an alternator, for a coil having a span of 2/3 of pole pitch, the coil span factor will be? Mark as favorite Copy Link 0.866 0.707 0.6 0.2 Check Answer
ln turbo-alternators, smooth cylindrical type rotors used have long axial length because? Mark as favorite Copy Link it gives smooth running of the rotor it reduces windage loss centrifugal force is reduced number of armature conductors being less, they have to be necessarily long for generating the required voltage Check Answer