1.

Economy can be achieved in doors, windows, ventilator by:(a) No frame(b) Less width(c) Steel frames(d) Less height

Answer» Right answer is (c) Steel frames

To elaborate: Doors, windows and ventilators are openings in the wall that are held on a frame. Not using a frame is economic, but not very aesthetic.  Using concrete/steel frames instead of wood can help in reducing cost.


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