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Asked: June 28, 2022In:

Which of the following circuit is designed to dissipate heat produced in the machine? a) Electric circuit b) Magnetic circuit c) Dielectric circuit d) Thermal circuit Answer: d Explanation: A thermal circuit in electrical machine design deals with the mode and media to dissipate heat produced in the machine. The heat produced in the machine leads to losses. 2. Which of the following materials is generally used in the design of electromagnetic machines? a) Paramagnetic materials b) Diamagnetic materials c) Ferromagnetic materials d) Core-magnetic materials Answer: c Explanation: Ferromagnetic materials can strongly act like a magnet when placed in a magnetic field. They are exhibited by materials such as iron, cobalt, nickel, etc. Ferromagnetic materials are generally used in electromagnetic machines. 3. What must be mainly ensured to keep the temperature rise within limits? a) Good efficiency of the machine b) Proper cooling and ventilation c) Proper saturation level d) Good insulation Answer: b Explanation: Temperature rise will affect the life of the insulation. Thus, proper cooling and ventilation must be ensured according to electric machine design to keep the temperature rise within limits. The coolant flowing will absorb the heat from machin

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