Electrical Machines Oil is provided in an oil filled transformer for cooling. insulating. both cooling and insulation. lubrication. cooling. insulating. both cooling and insulation. lubrication. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The polarity of a DC generator can be reversed by any of above. reversing field electric current as well as direction of rotation. increasing field current. reversing the field current. any of above. reversing field electric current as well as direction of rotation. increasing field current. reversing the field current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor electromotive force of the IM is observed to make 100 complete alterations per minute, calculated slip 3.33 %. 3 %. None of these 0 .001 %. 3.33 %. 3 %. None of these 0 .001 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In IM the rotor lamination can be ________________ than stator laminations. sipper. thicker. thinner. rotor can not have any laminations. sipper. thicker. thinner. rotor can not have any laminations. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines which of the following losses are negligible in blocked rotor test? copper loss both A and B mechanical loss iron loss copper loss both A and B mechanical loss iron loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous generator is feeding a zero power factor (lagging) load at rated current. The armature reaction is magnetizing. demagnetizing. cross – magnetizing. ineffective. magnetizing. demagnetizing. cross – magnetizing. ineffective. ANSWER DOWNLOAD EXAMIANS APP
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