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In the designation 10 DT 21, letter T stands for _________(a) Double shutter(b) Single shutter(c) Door opening(d) Height of openingI got this question during an internship interview.My question is from Size of Doors topic in division Doors, Windows and Ventilators of Construction & Building Materials

Answer»

Right answer is (a) Double shutter

The best explanation: In the designation 10 DT 21, the LETTER D stands for door and the letter T stands for double SHUTTERS. It tells that the WIDTH of the door opening is 10 modules i.e. 1000 mm and the height is 21 modules. Each module is of 100 mm.



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