If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor_____________?

A. of lower H.P. should be selected

B. of higher H.P. should be selected

C. can be used for 50°C ambient temperature also

D. is to be derated by a factor recommended by manufacturer and select the next higher H.P. motorCorrect Answer

Correct Option: D. is to be derated by a factor recommended by manufacturer and select the next higher H.P. motor

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