YEAR 10 (4th Yr) GRAPHICAL COMMUNICATION MARKING SCHEME

DIRECTORATE FOR QUALITY AND STANDARDS IN EDUCATION Department of Curriculum Management Educational Assessment Unit

Annual Examinations 2017

YEAR 10 (4th Yr) GRAPHICAL COMMUNICATION MARKING SCHEME

Question No. 1

Sectional Views

drawing faint projection lines from End View and Plan to Front View

1

drawing the ceiling of the tunnel

1

drawing the centre-lines and circle

2

drawing the vertical hole

2

drawing the semi-circular upper main body

1

drawing the base of the web

1

correct hatching

3

presentation / neatness and accuracy

1

Total marks for question No. 1

12

Question No. 2

Involute

extending the sides of the pentagon in the right direction drawing correct arcs from each corner of the pentagon finishing the drawing presentation / neatness and accuracy

Total marks for question No. 2

5 5 1 1

12

Question No. 1

Question No. 2

Graphical Communication ? Marking Scheme ? Year 10 (4nd Yr) ? 2017

Page 1 of 4

Question No. 3

Developments

dividing the semi-circle into six parts

1

projecting lines from the semi-circle divisions to the Front View

1

projecting lines from the Front View to the right

1

marking the necessary length and divisions as base of the development

3

erecting necessary lines from these divisions

1

marking the correct points to form the upper part of development

3

finishing the drawing

1

presentation / neatness and accuracy

1

Total marks for question No. 3

12

Question No. 4

Ellipse

constructing the ellipse using any correct method locating the focal points constructing the Normal reflecting the Normal to the other side completing the cap excluding the upper curved part locating the centre and drawing the upper curved part of the cap presentation / neatness and accuracy

Total marks for question No. 4

5 2 2 1 1 2 1

14

Question No. 3

Question No. 4

Page 2 of 4

Graphical Communication ? Marking Scheme ? Year 10 (4th Yr) ? 2017

Question No. 5

Perspective Projection

marking the length & width on base line and the height on vertical line

1

joining VP1 to VP2

1

erecting a line from the marked length and width to join top horizontal line 1

finding the mid-point M between the two vertical lines

1

forming the crate

2

marking dimensions on the vertical line and on the horizontal base line

2

directing all markings towards VP1, VP2 and point M as necessary

4

forming the two letters H and F

5

presentation / neatness and accuracy

1

note: any other correct construction method is accepted

Total marks for question No. 5

18

Question No. 5

Graphical Communication ? Marking Scheme ? Year 10 (4nd Yr) ? 2017

Page 3 of 4

Question No. 6

Circles in Contact

locating the centre and drawing arc AB locating the centre and drawing arc AC

drawing the arc with centre at D drawing the arc with centre at E locating the centre and drawing the R78 arc locating the centre and drawing the R10 arc locating the centre and drawing the R15 arc marking the points of tangency presentation / neatness and accuracy

Total marks for question No. 6

Question No. 7

Ideograms

a - using the right colours for a mandatory sign (blue & white) b - drawing two preliminary sketches

making the final drawing of the Prohibition sign colouring the sign with appropriate colours (red, black and white) presentation / neatness and accuracy

Total marks for question No. 7

2 2 1 1 3 3 3 1 2

18

3 2 5 3 1

14

Page 4 of 4

Question No. 6

Question No. 7a & 7b

Graphical Communication ? Marking Scheme ? Year 10 (4th Yr) ? 2017

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