Question

The size of a door frame is determined after allowing a margin of __________ all-round.

(a) 1 mm

(b) 3 mm

(c) 5 mm

(d) 7 mm

This question was addressed to me in an international level competition.

This question is from Door Frames in division Doors, Windows and Ventilators of Construction & Building Materials

Answer 1

The correct answer is:

(b) 3 mm

The size of a door frame is typically determined after allowing a margin of 3 mm all around. This margin is necessary to account for expansion, contraction, and to ensure proper fitting during installation.