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Drawing
Layout of the Paper

Section A: 15 short questions, attempt all questions but you are marked out of best 10.

Section B: 6 long questions, marked out of best 4. Make sure to do at least 4.

35 mins per question for higher level, exam is 3hours long

30 mins per question for ordinary level, exam is 2 and half hours long.

There is no need to put a border on the sheet.

Make sure you put your exam number and not your name on every sheet you hand up.

Remember there are marks going in every question for neatness and accuracy.

Make sure your sets are fully equiped before the exam.

Question 1

Orthographic Projection-Generally have to draw an elevation, plan and end elevation. Plan is always below the elevation. Put end elevation on correct side-looking at the left; see it on the right on your sheet. Circle in one view, divide up 60/30, bring to angled line in other view and both to the last view to give freehand curve. True shape by rotating line in plan and bringing up to elevation or by doing an auxiliary elevation from the line in plan.

Question 2

Rotations – Draw the given figure. Bring the point to the line, rotate them to the broken line and project them to the new view that’s asked for. This question may have polygons or enlargements as part of its set up.

Question 3

Axonometric – Set up the axes and draw the given views using the semi-circle method. Lines come up from plan and in at 30° from the other view to give 3D view in the middle. Curves have to be divided 60/30 and each point found individually.

Isometric Scale – Draw the same as isometric except that all measurements given have to be scaled down first. Scale is a 45° and 30° line; real measurements put on 45° line and scaled taken off 30° line.

Question 4

Developments – Draw the given figure and do development separately. Broken lines for folds in development.

Solids in Contact - This question can also have solids in contact as part or all of it. For these,roll the new object out to the side in elevation to see its point of contact. Then bring it down to plan and swing it around to it's proper position there. Sometimes an auxiliary elevation may be needed to find the point of contact. Remember to show all points of contact on the question in all views.

Question 5

Transformation Geometry - Remember to label all the points first and read the question to find the correct order and from which points. Translation – Distance and angle, image will looked the same but will have moved position. Axial symmetry - 90° to axial line and rotate points from the line, image will be a mirror of the object. Central symmetry – all the lines go through the central point and rotate around from that point, image will be upside down and back to front. Rotation – Set up the triangle for the angle given to get the rotation point. Rotate from this point, join each point to the rotation point and set off the angle to get the new point, image will have rotated around by the given angle.

Question 6

Ellipses and Parabolas – Parabola is drawn in a rectangle, take note of where the vertex is as that is where the angled lines join to. Ellipse is drawn using concentric circles method. Other things needed may be; Half the major swung from minor gives focal point, Focal point to point on curve plus point to other focal point is length of major axis. Know how to find the major circle when given the minor and a point on the curve (sketch it out). Know how to get a portion of a given ellipse. Know how to get an tangent to a point on the curve and a tangent to a point outside the curve.

Short Questions

Main things to watch out for:

Finishing off orthographic – Project lines between the views to finish

Freehand sketching – Reasonable sized sketch, not tiny. Add shade to sketch.

Perspective – Lines have to be vanished to two vanishing points, should look like the given 3D

Enlargements – From point A through the point and extend to meet the line.

CAD commands – Learn the command from the hand-out

Area Conversion – Triangle to rectangle, Rectangle to square, Rectangle to triangle

Circles in Contact – Join the centres to get Points of contact; don’t forget ones between circle and line

Developments – Where shape is opened out flat

Auxiliaries - 90° to X1Y1 from plan and take heights from elevation

 

 

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