04-BS-15 · December 2014
Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Reference texts: Bertoline & Wiebe, Technical Graphics Communication; Giesecke, Mitchell, Spencer et al., Technical Drawing / Engineering Graphics (ASME Y14.5 dimensioning practice, CSA B78.1 Canadian drafting conventions).
Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.
[Figure not reproduced: Given views: front view (left) and right-side view (right). See the official exam paper or the cited reference text.]
The left-hand view is the front view: a symmetric gabled block with a rectangular slot notched straight down from the ridge. The right-hand view is the right-side view: a right-triangular (wedge) profile, with one hidden vertical line marking where the slot's back wall lies behind the sloped face. By the glass-box rule, two principal views (front + side) fix width, height and depth only up to the third, so the missing view is the top view.
Approach. Project width straight down from the front view and depth across from the side view using a 45° mitre line, so every point in the top view lines up with its front-view and side-view counterparts. The wedge's sloping roof faces converge toward the back of the part (matching the side view's taper), and the rectangular notch is open to the sky, so it appears as a visible rectangle in the top view rather than a hidden one.
| Item | Result |
|---|---|
| Missing view | TOP view |
| Construction method | 45° mitre-line transfer (width from front, depth from side) |
| Notch line type | visible (solid) — open to the top, unlike its hidden appearance in the side view |
