Mock exam paper C Ordinary Level Marking Scheme

Pre-Junior Certificate Examination 2013

Technical Graphics

Ordinary Level

Marking Scheme

Section A and B

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Section A – Answer any ten questions from this section.

Q1

12

3 marks per missing line

Q2

8

Correct size & proportion

4

Shade/Shadow

Q3

4

8

Construction Lines

1 mark per drawing line

Q4

3

3

6

Bisect the line & draw perpendicular

Find Minor Axis

Complete the logo

Q5

8

Construction

4

Complete Triangle

Q6

4

4

4

Projection lines at right angle to X1Y1

Heights From Elevation

Complete View

Q7

12

14 units (6 marks for 13 – 15 units)

Q8

6

6

A = 0.8

B = 1.7

Q9

12

Correct sequence

Q10

6

6

Mouse

Scanner

Q11

6

6

Circle

Trim

Q12

6

6

Correct Projection Lines

Draw Figure

Q13

12

2 marks per correct line in perspective view

Q14

4

8

Correct direction of rotation

Handle drawn in rotated position

Q15

8

4

Construction for tangent line

Draw Tangent

Section B – Answer any four questions from this section.

Q.1 – Orthographic Projection

Orthographic Outline (10) All views in correct positions

Elevation (15)

10

5

Outline

Window

Plan (15)

8

4

3

Width

Lines projected down (2 + 2)

Window Hidden Detail

End View (20)

6

6

2

3

3

Projection lines Horizontal 3 x 2

Projection lines Plan 3 x 2

Roof

Arc

Window Hidden Detail

10

Drafting, accuracy, presentation

Total Marks 70

Q.2 – Ellipse

Ellipse Construction (40)

10

15

15

Locate Axis

Construct First Curve

Offset Curves

Base (10)

10

2 marks per correct line

Complete View (10)

5

5

Hood

Seat

10

Drafting, accuracy, presentation

Total Marks 70

Q.3 (a) – Development

Orthographic (30)

4

8

6

12

Position of Elevation, End View & Plan

End View

Plan

Completed Elevation (2marks per correct point)

Development (30)

4

4

10

6

6

Back

Base

Sections

Heights

Curved line

10

Drafting, accuracy, presentation

Total Marks 70

Q.4– Isometric Projection

Setting Up (15)

9

6

Height, Length & Width of Grid (3 x 3)

Oblique Outline

Front Face (22)

8

6

8

E – Correct View (-1 per wrong line)

T– Correct View (-1 per wrong line)

C– Correct View (-1 per wrong line)

Projection (21)

Complete Width (21)

7 marks per letter. 4marks if not complete.

12

Drafting, accuracy, p...

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