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Tasmanian Certificate of Education
External Assessment 2019
TECHNICAL GRAPHICS (TEG315115)
Time Allowed:
Working time: 2 hours
Plus 15 minutes recommended reading time
On the basis of your performance in this examination, the examiners will provide results on each of the
following criteria taken from the course document:
Criterion 2 Apply geometric knowledge and skills in interpreting and transferring drawings
Criterion 3 Solve geometric problems
PLACE YOUR CANDIDATE
LABEL HERE
Candidate Instructions
1. You MUST make sure that your responses to the questions in this examination paper will show
your achievement in the criteria being assessed.
2. There are THREE sections to this paper.
3. You must answer SIX QUESTIONS:
ALL FOUR questions in Section A
ONE question in Section B
ONE question in Section C.
4. Answer each question on the drawing paper provided.
5. You are required to use correct line work and presentation, and are encouraged to include freehand
sketches where necessary, to show the development of ideas in the solution of problems.
Construction must be shown.
6. All dimensions are in millimetres unless otherwise stated.
7. All written responses must be in English.
Pages: 16
Questions: 10
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Answer ALL questions in this section on the drawing paper provided.
This section assesses Criteria 2 and 3.
Question 1: This question assesses Criterion 2.
Figure 1 shows the end view of a regular hexagonal prismatic container positioned on a horizontal floor.
Graphically determine whether or not the container, when rolled clockwise (without sliding), will pass
through the opening.
Figure 1
Section A continues
SECTION A
TEG315115 Page 4 of 16
Section A (continued)
Question 2: This question assesses Criterion 3.
Figure 2 shows the plan and elevation of a regular hexagonal studio.
Graphically determine the longest straight 20mm metal rod that can be carried into the studio.
Figure 2
Section A continues
TEG315115 Page 5 of 16
Section A (continued)
Question 3: This question assesses Criterion 2 and 3 equally.
Figure 3 shows a disc with centre C that is fixed to a vertical wall. Attached to the disc at pivot A is an arm
with a counterweight. The arm is free to swing about pivot A, but the Stops B and D limit the arm’s
movement as the disc rotates.
Plot the path of P (the centre of the counterweight) as the disc rotates in the direction of the arrow for one
revolution.
Figure 3
Section A continues
TEG315115 Page 6 of 16
Section A (continued)
Question 4: This question assesses Criterion 2 and 3 equally.
Draw the Displacement Graph of a cam that is fixed to a 10mm diameter shaft and imparts the following
motion to an on-centre knife edged follower. The cam rotates in a clockwise direction.
0°- 120° from 60mm above the shaft centreline to 75mm maximum height with uniform velocity
120°- 180° dwell (rest)
180°- 360° back to 60mm above the shaft centreline with simple harmonic motion.
TEG315115 Page 7 of 16
Answer ONE question in this section on the drawing paper provided.
This section assesses Criteria 2 and 3 weighted 1:4 respectively.
Question 5:
Figure 4 shows the plan and elevation of a “butterfly (dihedral) roof” house.
Graphically determine:
(a) the true (dihedral) angle between the two roof panels and
(b) the true shape of each roof panel.
Figure 4
Section B continues
SECTION B
TEG315115 Page 8 of 16
Section B (continued)
Question 6:
A round reflector R is fitted to a bicycle wheel as shown in Figure 5.
Draw the path of the centre of the reflector R as the wheel rolls (without slipping) through one full revolution
along the ground line.
Figure 5
Section B continues
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Section B (continued)
Question 7:
Figure 6 shows an isometric view of a beach house.
Draw a fully dimensioned Third Angle Orthographic Projection of the beach house showing:
(a) a plan view and
(b) two elevations from the direction of the arrows.
Figure 6
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Answer ONE question in this section on the drawing paper provided.
This section assesses Criteria 2 and 3 weighted 4:1 respectively.
Question 8:
Figure 7 shows the elevation of a square topped rubbish bin.
Develop all surfaces of the bin.
Figure 7
Section C continues
SECTION C
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Section C (continued)
Question 9:
Figure 8 shows the intersection of a semi-elliptical covered walkway with a hemispherical dome
conservatory.
(a) draw the line of intersection between the walkway and the dome in the elevation, and
(b) develop the surface of the semi elliptical cover of the walkway.
Figure 8
Section C continues
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Section C (continued)
Question 10:
Remove each corner of a 60mm cube so that the original square faces become octagons.
Draw an isometric view of the new solid.
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This examination paper and any materials associated with this examination (including answer booklets, cover sheets, rough note
paper, or information sheets) remain the property of the Office of Tasmanian Assessment, Standards and Certification (TASC).
