Electrical Machines Which of these types of motor is used in elevators? DC series motor. DC compound motor. DC shunt motor. None of these. DC series motor. DC compound motor. DC shunt motor. None of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a single phase capacitor start induction motor which of the following is valid? Direction of rotation cannot be changed. Rotation can be changed by interchanging supply terminals. Rotation can be changed by reversing main winding terminals. None of these. Direction of rotation cannot be changed. Rotation can be changed by interchanging supply terminals. Rotation can be changed by reversing main winding terminals. None of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous machine, if φ is the flux per pole and f is the frequency of the emf induced E then E ∝ φ/f E ∝ φf E ∝ 1/(φf) E ∝ f/φ E ∝ φ/f E ∝ φf E ∝ 1/(φf) E ∝ f/φ ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of single phase induction motor is having the highest power factor at full load ? Capacitor start. Shaded pole type. Capacitor run type. Split phase type. Capacitor start. Shaded pole type. Capacitor run type. Split phase type. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is 4% 5% 2% 25% 4% 5% 2% 25% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the field-flux axis and armature-mmf axis are respectively along quadrature axis and direct axis direct axis and interpolar axis direct axis and indirect axis quadrature axis and interpolar axis quadrature axis and direct axis direct axis and interpolar axis direct axis and indirect axis quadrature axis and interpolar axis ANSWER DOWNLOAD EXAMIANS APP
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