Design & Communication Graphics · The drawing below shows an incomplete trimetric projection of a...

2015.1 L.84/85_MS 1/20

L.84/85

Pre-Leaving Certificate Examination, 2015

Design & Communication Graphics

Marking Scheme

Ordinary Pg. 3 Higher Pg. 12

2015.1 L.84/85_MS 2/20

2015.1 L.84/85_MS 3/20

A-1. The 3D graphic below shows a patio

area where three chairs and a table are in front of a fire source.

A set of isometric axes and a partially

completed isometric drawing of one chair are shown on the right. The elevation and partially completed plan of this chair have been positioned relative to the axes as shown.

Complete the plan and the axonometric

projection of the chair.

A-3. The 3D graphic below shows a doll’s house.

The plan and incomplete elevation of the doll’s house are shown on the right.

(a) Complete the elevation of the

outline of the doll’s house.

(b) Draw an auxiliary elevation of the doll’s house on the given X1Y1 which will show the true angle between the two roof surfaces.

A-2. The 3D graphic below shows a set of hemispherical

domes and a training cone for football training. The drawing on the right shows the

plan and elevation of hemisphere A. The elevation of cone C which is in contact with the hemisphere is also shown. All solids rest on the horizontal plane.

(a) Draw the plan of cone C. (b) Draw the plan and elevation of a sphere

equal in radius to hemisphere A which is in contact with the given solids A and C and rests on the horizontal plane.

A-4. The 3D graphic below shows an entrance

to a building. The top of the entrance is in the shape of the semi-ellipse.

In the drawing on the right, AB is the

major axis of the ellipse. The focal points are also shown.

(a) Locate the minor axis of the ellipse.

(b) Draw the semi-ellipse.

SECTION A - Core - Answer Any Three of the questions on this A3 sheet

This examination paper must be returned at the end of the Examination – You must include your Name, School Name and Teacher Name on the front cover

MARKING SCHEME Total (20) Completion of plan (4m)

Projections from plan (4m) Projections from elevation (4m) Establish end points (2m) Completion (4m)

Presentation (2m)

MARKING SCHEME Total (20) (a) Projection (4m) Completion (4m)

(b) Projection from plan (2m) Heights (4m) Completion (4m)

Presentation (2m)

MARKING SCHEME

Total (20)

(a) Projection to plan (2m) Arc (4m) Completion (4m)

(b) Projection to plan (2m) Arc (2m) Completion (4m)

Presentation (2m)

MARKING SCHEME Total (20) (a) Minor axis

Arcs (4m) Completion (4m)

(b) Method (6m) Curve (4m)

Presentation (2m)

2015.1 L.84/85_MS 4/20

examsDEB

ExamCentre, Units 3/4, Fonthill Business Park, Fonthill Road, Dublin 22. Tel: (01) 616 62 62 Fax: (01) 616 62 63


Ordinary Level – Section (B)

L.84 Scale 1:1 Question B-1

MARKING SCHEME Total (45) (a) Plan outline (7m) Completion (6m) Elevation outline (6m) Completion (4m) (b) X1Y1 (2m) Projectors (2m) Heights (2m) One surface (3m) Completion (9m) Presentation (4m)

2015.1 L.84/85_MS

5/20

ex

am

sD

EB

Exam

Centre,

Units 3/4,

Fonthill Business P

ark, Fonthill R

oad, D

ublin 22. Tel: (01) 616 62 62 Fax: (01) 616 62 63

Pre-Leaving Certificate Exam

ination, 2015

Ordinary Level – S

ection (B)

L.84 S

cale 1:1 Q

uestion B-2

MA

RK

ING

SCH

EME

Total (45) Plan (8m

) PP, G

L and HL (12m

) V

anishing Points (6m)

Walls (6m

) R

oof (6m)

Com

pletion (3m)

Presentation (4m)

2015.1 L.84/85_MS 6/20

examsDEB



Ordinary Level – Section (B)


MARKING SCHEME Total (45) Hexagonal Prism Plan (5m) Elevation (4m) Square Prism Plan (4m) Elevation inc, set up (2,2) (4m) End view (7m) Interpenetration Projections from LHS of plan (2m) Locate points in elevation (4m) Complete LHS of elevation (2m) Projections from RHS of plan (2m) Locate points in elevation (4m) Complete RHS of elevation (2m) Hidden detail (1m) Presentation (4m)

2015.1 L.84/85_MS 7/20

examsDEB



Ordinary Level – Section (C)

L.84 Scale 1:1000 Question C-1

MARKING SCHEME Total (45) (a) Height lines (6m) Projectors (6m) Profile (7m) (b) Lowest point (3m) Altitude (3m) Completion (3m) (c) 5m parallel lines (5m) Plot points (4m) Curve (4m) Presentation (4m)

2015.1 L.84/85_MS 8/20

examsDEB





MARKING SCHEME Total (45) (a) Plan outline (6m) Elements (6m) Elevation outline (6m) Elements (7m) Curve (2m) (b) Outline (6m) Elements (6m) Curve (2m) Presentation (4m)

2015.1 L.84/85_MS 9/20

examsDEB





MARKING SCHEME Total (45) (a) Plan 6m) Elevation (6m) Completion (6m) (b) Base (5m) Plane vertical surfaces (6m) Curved surfaces (8m) Completion (4m) Presentation (4m)

2015.1 L.84/85_MS 10/20

Fig. C-4(a)

Fig. C-4(b)

examsDEB





MARKING SCHEME Total (45) (a) Set up (4m) Division (4m) Construction (8m) Curve (4m) (b) Outline (4m) UV construction (4m) Dwell (2m) Vertical divisions (2m) SHM construction (6m) Completion (3m) Presentation (4m)

2015.1 L.84/85_MS 11/20

examsDEB





MARKING SCHEME Total (45) Relative positioning of parts (8m) Pin (7m) Handles (7m) Receiver (5m) Screw sets (4m) Washers (2m) Drawing completion Hatching (4m) Centrelines (4m) Presentation (4m)

2015.1 L.84/85_MS 12/20

A-1. The 3D graphic below shows a set of

trophies both of which are based on a cube.

The drawing on the right shows the plan of a similar cube which is oriented as shown.

(a) Find the true shape of any square surface of the cube.

(b) Project an elevation of the cube which shows the cube in contact with the horizontal plane.

A-3. The 3D graphic below shows a mirror

which has a rectangular sloping face as shown. The diagram on the right shows the plan of the sloping rectangular surface ABCD and the elevation of the line AB of the rectangle ABCD.

(a) Complete the elevation of the rectangle ABCD.

(b) Draw the traces of the oblique plane which contains the surface ABCD.

(c) Find the inclination of this oblique plane to the vertical plane.

A-2. The 3D graphic below shows a litter bin. The drawing below shows an incomplete trimetric projection

of a similar litter bin using the axonometric axes method.

(a) Complete the axonometric of the litter bin.

(b) Determine the true shape of the rectangular top surface of the litter bin.

A-4. The 3D graphic on the right shows a number of roof surfaces on a

residential house. The drawing below shows two intersecting roof surfaces A and B.

(a) Determine the true length of the line of intersection between the surfaces A and B.

(b) Determine the dihedral angle between the roof surfaces A and B.

This examination paper must be returned at the end of the Examination – You must include your Name, School Name and Teacher Name on the front cover

SECTION A - Core - Answer Any Three of the questions on this A3 sheet

MARKING SCHEME Total (20) TL of one edge (4m) TS of one face (2m) Method (4m) Base (4m) Completion (4m)

MARKING SCHEME Total (20) Projectors (4m) Points (4m) Curve (3m) Completion (3m) Method (3m) Completion (3m)

MARKING SCHEME Total (20) Projections (4m) Completion (4m) Method (6m) Completion (6m)

MARKING SCHEME Total (20) Method (3m) Completion (3m) Method (4m) Completion (4m)

Method (3m) Completion (3m)

2015.1 L.84/85_MS 13/20

MARKING SCHEME Total (45) (a) Elevation and plan of base solid (4m) Sloping solid – Cross section (4m) – Elevation (4m) – Plan (6m) (b) Interpenetration of LHS (6m) Interpenetration of RHS (6m) Interpenetration of top (7m) (c) Completion (8m)

examsDEB



Higher Level – Section (B)


2015.1 L.84/85_MS 14/20

examsDEB





MARKING SCHEME Total (45) (a) Elevation (6m) Plan – Outline (4m) – Completion (8m) End view – Projections (6m) – Completion (9m) (b) True shape Method (6m) Curve (2m) (c) Focal point (2m) Directrix (2m)

2015.1 L.84/85_MS 15/20

examsDEB





MARKING SCHEME Total (45) (a) Plane (8m) S, PP vanishing points (6m) GL, HL, vanishing points (4m) Projectors (4m) Base (6m) Underside (5m) Side (6m) AVP (3m) Completion (3m)

2015.1 L.84/85_MS 16/20

examsDEB



Higher Level – Section (C)


MARKING SCHEME Total (45) (a) (i) Earthworks AB Parallel lines (10m) Intersections – curves (9m) (ii) Earthworks BC Arc (5m) Parallel lines (4m) Intersections – curves (7m) (b) Plot strikes (3m) Dip (3m) Plot borehole (2m) Thickness (2m)

2015.1 L.84/85_MS 17/20

examsDEB





MARKING SCHEME Total (45) (a) Construction (6m) Curve (6m) (b) Construction BD (6m) Curve BD (6m) Completion (3m) (c) Projections (5m) Section (5m) Widths (5m) Completion (3m)

2015.1 L.84/85_MS 18/20

examsDEB





MARKING SCHEME Total (45) (a) Set up (4m) Construction (8m) Completion (4m) (b) Method (6m) Solution (6m) (c) True length (4m) Construction (4m) Completion (4m) (d) Construction (3m) True shape (2m)

2015.1 L.84/85_MS 19/20

Fig. C-4(a)

Fig. C-4(b)

examsDEB





MARKING SCHEME Total (45) (a) Displacement diagram outline (4m) Construction for curves (4m) Construction for linear movement (4m) Curve (2m) Profile outline (3m) Transfer of points (3m) Curve (3m) (b) Set up (5m) Divisions (7m) Location of points (5m) Curve (5m)

2015.1 L.84/85_MS 20/20

examsDEB





MARKING SCHEME Total (45) Relative positioning of parts (7m) Main body (5m) Moving head (5m) Link (4m) Arm (4m) Handle (4m) Drawing completion (11m) Method & height (5m)

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