Category Archives: Electrical Machines MCQ

This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Torque Production and Dynamic Equations”. 1. The magnitude of electromagnetic or interaction torque, in all rotating machines, is given by ____________ a) Te ∝ (stator field strength)sinδ b) Te ∝ (rotor field strength)sinδ c) Te ∝ (stator field strength)(rotor field strength)sinδ d) … Read more

This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Singly Excited Electric Field Systems”. 1. A parallel plate capacitor has a capacitance of 10μF. If the linear dimensions of the plates are doubled and distance between them is also doubled, the new value of capacitance would be __________ a) 10μF b) … Read more

This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Elementary Synchronous Machines”. 1. Consider a single phase synchronous machine of cylindrical rotor type. A single phase supply is given to the stator winding and a voltmeter is connected across rotor winding. For what value of θr, the voltmeter reads maximum? a) … Read more

This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Doubly Excited Magnetic Systems”. 1. Which of the following are examples of doubly-excited magnetic systems? a) Synchronous Machines b) Loudspeakers and Tachometers c) D.C Shunt Machines d) All of the mentioned 2. Most of the electromagnetic energy conversion devices belong to __________ … Read more

This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Reluctance Motor”. 1. What is the angle between stator direct axis and quadrature axis? a) 90° b) 0° c) 45° d) 60° 2. Space angle, θr is measured between stator d-axis and _______________ a) quadrature axis b) direct d-axis c) long rotor … Read more

This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Singly Excited Magnetic Systems”. 1. For a toroid to extract the energy from the supply system, the flux linkages of the magnetic field must be ________ a) zero b) changing or varying c) constant d) any of the mentioned 2. Magnetic stored … Read more

This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Principle of Energy Conversion”. 1. An electro-mechanical energy conversion device is one which converts _______ a) Electrical energy to mechanical energy only b) Mechanical energy to electrical energy only c) Electrical to mechanical and mechanical to electrical d) None of the mentioned … Read more