Electrical Engineering MCQs for competitive tests, job tests, university exams are provided on various Electrical and Electronics topics.
Electrical Engineering XYZ MCQs Polarity of supply voltage is reversed in case of which type of braking: Correct answer: 1. Plugging Explanation: Plugging is the most powerful method of braking an electric motor, consisting of actively applying power to the motor in the opposite direction of its rotation. This is analogous to reversing the engine thrust of a power … Read more
Electrical Engineering XYZ MCQs Speed control by variation of field flux results in: Correct answer: 2. Constant power drive Explanation: In many applications, it’s desirable to maintain a constant power output regardless of the speed. This is particularly useful in applications where the load may vary, but the desired performance remains constant. When the field … Read more
Electrical Engineering XYZ MCQs In case of kiln drives, starting torque is: Correct answer: 3. More than double of the running torque Explanation: In case of kiln drives, the starting torque required is typically more than double of the running torque. This is because when a kiln starts from rest, it needs to overcome static … Read more
Electrical Engineering XYZ MCQs While operating on variable frequency supplies, the AC motor requires variable voltage, that is so as to: Correct answer: 4. Avoid effect of saturation
Electrical Engineering XYZ MCQs Which of following is a constituent in speed time curve of train: Correct answer: 4. All of these Explanation: In the speed-time curve of a train, all of the mentioned constituents are typically present: Thus, all of these constituents are integral parts of a train’s speed-time curve, representing different phases of … Read more
Electrical Engineering XYZ MCQs High braking torque is produced in case of which braking method: Correct answer: 2. Plugging braking Explanation: Plugging is the most powerful method of braking an electric motor, consisting of actively applying power to the motor in the opposite direction of its rotation. List of all braking methods:
A four quadrant operation requires: Correct answer: 4. Two full converter connected in back to back Explanation: A four-quadrant operation refers to the ability of a power converter to control power flow bidirectionally between a source and a load in all four quadrants of the voltage-current plane. These quadrants represent both the positive and negative … Read more
Electrical Engineering XYZ MCQs Which speed control method is generally preferred for constant torque drive in shunt motor: Correct answer: 3. Armature voltage control Explanation: In the context of a shunt motor, the armature control method can indeed provide a relatively constant torque drive. In a shunt motor: With a constant flux, the torque produced … Read more
Electrical Engineering MCQs The basic elements of an electric drive are: Correct answer: 1. Electrical motor and control system Explanation: So, an electric drive typically comprises both the electric motor and the control system working together to achieve the desired mechanical output efficiently. Therefore, the correct answer includes both these elements.
Electrical Engineering XYZ MCQs Full form of VVVF control is: Correct answer: 3. Variable voltage variable frequency Explanation: VVVF stands for Variable Voltage Variable Frequency. This term is often used in the context of motor control or drive systems, particularly in applications like variable speed drives (VSDs) or variable frequency drives (VFDs). In such systems, the speed … Read more