A mixed set tests several skills on one object. Read every task first, write down the object’s three dimensions, and check after each task.
This lesson sits in integrated drawing practice and follows reviewing common mistakes.
What is the routine for a mixed set?
- Read all tasks. Write the object’s width, height and depth.
- Do tasks in order, with a one-line check after each.
- If stuck, write an assumption, move on, and return.
- Finish with the six-slip scan from the mistakes lesson.
The worked set: one original bracket
The bracket is 60 mm wide, 40 mm high and 30 mm deep. It is an L-shape: the left 20 mm is full height, and the right 40 mm is 15 mm high. Both parts are 30 mm deep.
Task 1. A view shows a dashed line at height 15 running across a rectangle. Which view is it, and what does the line mean?
It is the side view from the left. The right part is behind the tall left part, so its top edge at height 15 is hidden.
Task 2. The front view is drawn at 1:2. What are the drawn width and height?
Drawn width = 60 ÷ 2 = 30 mm. Drawn height = 40 ÷ 2 = 20 mm.
Task 3. The front view shows the L-shape and the top view is a rectangle 60 × 30. Give the side view outline.
Depth and height: 30 wide, 40 high, with the dashed line at height 15.
Task 4. A top view has its step line at x = 25. Is this consistent with the front view?
No. The front view puts the step at x = 20. The views disagree by 5 mm, so the top view line should move to x = 20.
Task 5. Draw the bracket in cabinet oblique. What are the drawn receding edge length and the drawn front face?
The front face is true shape: 60 × 40 with the step. Receding edges are at half length: 30 ÷ 2 = 15 mm at 45°.
Every task used the same three numbers, 60, 40 and 30, so no figure had to be guessed.
The mistake: treating each task as new
A student reads Task 4 and measures the top view to get 25 by eye, without going back to the front view’s 20. The earlier tasks already held the number.
| Step | Wrong | Right |
|---|---|---|
| Source of the step position | Eye, from the top view | The 20 mm left part, from the front view |
| Checking against earlier tasks | Skipped | Compared with Task 3’s views |
| Outcome | Error passes | 5 mm disagreement found |
In a linked set, earlier tasks hold the facts. Go back to them before you measure or guess.
Check yourself
A second bracket is 80 mm wide, 50 mm high and 25 mm deep, with a tall left part 30 mm wide and a right part 20 mm high. What are the dashed-line height and the outline of the side view from the left, and what is the receding edge at cabinet oblique?
Answer
The side view outline is 25 wide (depth) by 50 high, with a dashed line at height 20, since the right part’s top is behind the tall part. In cabinet oblique, the receding edge is 25 ÷ 2 = 12.5 mm at 45°.
What to study next
Try the integrated drawing practice set for eight more mixed questions. Then read preparing drawing goals for paid online tuition if you are considering lessons.
If you want a teacher to give you a linked set and time you, see online one-to-one Engineering Drawing tuition.