Direction of rotation of DC motor is reversed by
Electrical Engineering XYZ MCQ Direction of rotation of DC motor is reversed by: Correct answer: 1. Reversing armature or field connection
Electrical Engineering Mcqs
Electrical Engineering MCQs for competitive tests, job tests, university exams are provided on various Electrical and Electronics topics.
- Basic Electrical Laws and Theorems
- Basic Voltage and Current MCQs
- High Voltage Engineering MCQs
- Induction Motor MCQs
- Power Electronics
- Power Distribution MCQs
- Power Generation MCQs
- Power System Protection MCQs
- Power Transmission and Distribution MCQs
- Semiconductors theory MCQ Questions
- Synchronous Generator MCQs
- Synchronous motor MCQs
- Transformer MCQs
In DC machine armature windings are placed on rotor, that is because of the necessity for
Electrical Engineering XYZ MCQ In DC machine armature windings are placed on rotor, that is because of the necessity for: Correct answer: 4. All of these Explanation: In a DC machine, the armature windings are placed on the rotor due to the necessity for different types of DC motors – compound motors, series motors, and … Read more
A DC series motor is accidentally connected to single phase ac supply voltage. The torque produced will be
Electrical Engineering XYZ MCQ A DC series motor is accidentally connected to single phase ac supply voltage. The torque produced will be: Correct answer: 3. Pulsating and unidirectional Explanation: The correct answer is “Pulsating and unidirectional.” When a DC series motor is accidentally connected to a single-phase AC supply voltage, the torque produced will be … Read more
Total core loss is also known as
Electrical Engineering XYZ MCQ Total core loss is also known as: Correct answer: 4. Magnetic loss Explanation: Magnetic loss is a term used to encompass the total core loss, which includes both eddy current loss and hysteresis loss. It reflects the energy dissipated in the magnetic core material due to these two mechanisms when subjected … Read more
In DC motors, under trailing pole tips, the flux density will
In DC motors, under trailing pole tips, the flux density will: Correct answer: 1. Decrease Explanation: For DC motor main field flux and armature flux will oppose each other under trailing pole tips. When the armature flux leaves the main pole it opposes the main field flux.
So as to achieve sparkles commutation, brushes are always placed on
Electrical Engineering XYZ MCQ So as to achieve sparkles commutation, brushes are always placed on: Correct answer: 1. MNA Explanation: In case of DC machine, to achieve sparkless commutation, brushes are placed on the MNA (Main Neutral Axis). The MNA is the axis along which there is no induced emf when the coil is rotated … Read more
No load saturation characteristics are plotted between
Electrical Engineering XYZ No load saturation characteristics are plotted between`: Correct answer: 1. No load voltage and field current Explanation: The no-load saturation characteristics of a synchronous machine are typically plotted on a graph with the no-load voltage on the vertical axis and the field current on the horizontal axis. This graph helps in understanding … Read more
Inter pole winding is connected in
Electrical Engineering XYZ MCQ Inter pole winding is connected in: Correct answer: 3. Series with armature Explanation: Interpoles, also known as commutating poles or commutating winding, are additional field windings placed between the main poles of a DC machine. These interpoles serve the purpose of compensating for armature reaction, which is the distortion of the … Read more
Which of the following statement regarding bearing usage is correct
Electrical Engineering XYZ MCQs Which of the following statement regarding bearing usage is correct: Correct answer: 3. Both of these Explanation: The correct answer is: Both of these.
The shape of main field flux distribution in DC machine is
Electrical Engineering XYZ MCQ The shape of main field flux distribution in DC machine is: Correct answer: 4. Flat tapped or trapezoidal