Building Construction MCQ with answer and solution

Concept

Jamb is the vertical side face of a door or window opening. The frame is fixed against it.

Step-by-step solution

1. Find the part that forms the vertical side of the opening. 2. The vertical side faces of an opening are called jambs. 3. The door or window frame is fixed to the jambs, so the jambs support it. 4. So the answer is Jamb.

Explanation

The vertical sides of a door or window opening in a wall are called jambs. The frame is placed against the jambs and held by them. So jamb is the correct answer.

Why the other options are wrong

Reveal: the small exposed part of the jamb between the frame and the outer wall face. Mullion: a vertical bar that divides a window into parts. Post: a vertical member of the frame itself, not the face of the opening.

Shortcut

Jamb = side wall of the opening. Reveal = exposed strip of the jamb.

Common mistake

Confusing jamb with reveal, or with mullion (a window divider).