A transition duct is shown.
What is the true angle of the line \(1-a\) to the horizontal plane?
- \(69°\)
- \(81°\)
- \(90°\)
- \(101°\)
ENGINEERING, AE 2017 HSC 26b
Orthogonal and pictorial drawings of a sheet metal electrical cable cover are given below.
- Draw a half-development of the electrical cable cover. Use the centre line to position the development. (4 marks)
- A 20 mm diameter hole is to be punched through the top of the electrical cable cover before folding.
- The ultimate shear stress of the material used to manufacture the cover is 110 MPa.
- Calculate the force required to punch out the hole if the thickness of the sheet metal is 0.5 mm. (3 marks)
--- 6 WORK AREA LINES (style=blank) ---
Show Answers Only
i.
ii. `3.46\ text{kN}`
Show Worked Solution
i.
Key Points for this Drawing:
- Find true length of each line from the diagrams given
- Do not dimension
- Only complete a half development, not a full development
- Use lighter lines for the the bends/folds and heavier lines for the outline
- Label all points
| ii. | `delta_S` | `=F_S/A_S` |
| `F_S` | `=delta_S xx A_S` |
`A_S = pid xx t=pi xx 20 xx 0.5 = 31.4\ text{mm}^2`
| `:.F_S` | `= 110 xx 31.4` | |
| `=3455.7\ text{N}` | ||
| `=3.46\ text{kN}` |
♦ Mean mark (ii) 42%.
ENGINEERING, AE 2022 HSC 27b
The top and front views of a transition piece in an aircraft air conditioning duct are shown.
Complete a half-pattern development of the transition piece, starting from the line `a`-1 given below. (6 marks)
--- 0 WORK AREA LINES (style=blank) ---
Show Answers Only
Notes on this drawing:
→ Ensure you find the true length of lines
→ Ensure fold lines are lighter than the outline
→ Since the half development cuts through a side, ensure you use a break line
→ Do not dimension
→ Only complete a half development and not a full development
Show Worked Solution
Notes on this drawing:
→ Ensure you find the true length of lines
→ Ensure fold lines are lighter than the outline
→ Since the half development cuts through a side, ensure you use a break line
→ Do not dimension
→ Only complete a half development and not a full development
♦ Mean mark 40%.
ENGINEERING, AE 2018 HSC 12 MC
A transition piece is shown.
Which of the following correctly represents the development of the transition piece?
ENGINEERING, AE 2022 HSC 8 MC
It is appropriate to produce a half development of a transition piece when the piece
- is very large.
- is symmetrical.
- is very complex.
- needs to be produced quickly.