1.

How many classes have their temperatures above 100°C?(a) 5(b) 6(c) 7(d) 8I have been asked this question in semester exam.This intriguing question comes from Temperature Rise and Insulating Materials in portion Electrical Engineering Materials of Design of Electrical Machines

Answer»

The correct answer is (b) 6

The EXPLANATION is: There are 7 insulation classes PRESENT in relation with TEMPERATURE. Of the 7 classes, there are 6 classes WHOSE temperatures are greater than 100°C. Class Y is the only class having temperature less than 100.



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