Laminations of core are generally made of? Mark as favorite Copy Link case iron carbon silicon steel stainless steel Check Answer
In D.C. generator the change in voltage when the load is reduced from rated value to zero, expressed as a percent age of rated load voltage, is known as? Mark as favorite Copy Link efficiency regulation armature reactance loss factor Check Answer
The slight curvature at the lower enr1 of the O.C.C. of a self-excited DC generator is due to? Mark as favorite Copy Link high armature speed high field circuit resistance residual pole flux magnetic inertia Check Answer
A shunt generator can self-excite? Mark as favorite Copy Link only if the resistance of the field circuit is less than critical value only if the resistance of the field circuit is greater than critical value irrespective of the value of the resistance in the field circuit none Check Answer
DC series generator is used? Mark as favorite Copy Link to supply traction load to supply industrial Load at constant voltage as a booster to maintain constant voltage at the load end of the feeder for none of the above purpose Check Answer
The polarity of a D.C. generator can be reversed by? Mark as favorite Copy Link reversing the field current increasing field current reversing field current as well as direction of rotation any of the above Check Answer
Which one of the following types of generators does not need equilizers for satisfactory parallel operation? Mark as favorite Copy Link Flat-compound Over-compound Under-compound Series Check Answer
In a D.C. generator in case the brushes are moved so as to bring them in magnetic neutral axis, then, there will be? Mark as favorite Copy Link demagnetisation cross-magnetisation cross-magnetisation as well as demagnetisation none of the above Check Answer
Iron losses in a D.C. machine are independent of variations in? Mark as favorite Copy Link speed load voltage speed and voltage Check Answer
ln D.C. generator, on no load? Mark as favorite Copy Link magnetic neutral axis moves from geometrical neutral axis in the opposite direction of rotation magnetic neutral axis coincides with geometrical neutral axis magnetic neutral axis moves from geometrical neutral axis m the direction of rotation none of the above Check Answer