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Dc motors
Note:- You can add tough questions into your favourite list for second revision. |
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 [Wrong Answer] |
B. | of higher H.P. should be selected [Wrong Answer] |
C. | can be used for 50°C ambient temperature also [Wrong Answer] |
D. | is to be derated by a factor recommended by manufacturer and select the next higher H.P. motor [Correct Answer] |