The electromechanical energy conversion devices used in power systems are never operated to deliver maximum power output because at maximum power output _____________(a) Efficiency is less than 50%(b) Temperature of the power devices is much more than the specified allowable temperature rise(c) Half of the power input appears as losses(d) Any of the mentionedI got this question in an interview for internship.Query is from Losses and Efficiency topic in portion Rating and Loss Dissipation of Electrical Machines

The electromechanical energy conversion devices used in power systems

1.	The electromechanical energy conversion devices used in power systems are never operated to deliver maximum power output because at maximum power output _____________(a) Efficiency is less than 50%(b) Temperature of the power devices is much more than the specified allowable temperature rise(c) Half of the power input appears as losses(d) Any of the mentionedI got this question in an interview for internship.Query is from Losses and Efficiency topic in portion Rating and Loss Dissipation of Electrical Machines
Answer» Correct answer is (b) Temperature of the power devices is much more than the SPECIFIED ALLOWABLE temperature rise Easiest explanation: In practice, devices are operated at a LOAD somewhat less than rated load, at which the efficiency is MAXIMUM.

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