BECE JHS
Technical drawing describes an object so that another person can make it. The line you choose, and the view you choose, are part of the answer.
A thick continuous line is a visible outline. A thin continuous line is used for construction, for dimensions, and for projection. A dashed line shows an edge you cannot see from that side. A chain line, made of a long stroke and a short stroke, marks a centre. Lettering is upright, usually in capitals, of one height, between light guidelines. Instruments do specific jobs. A tee square, with its head against the edge of the board, draws horizontal lines. Set squares used with the tee square draw vertical lines and lines at 30, 45 and 60 degrees. A compass draws circles and arcs. A protractor measures angles. A scale rule measures. A freehand sketch does not need these instruments. A formal drawing does.
Orthographic projection shows the object as separate flat views, commonly the front, the plan from above, and one end. Each view is true to that direction. You need more than one view to understand the whole object. A pictorial drawing, such as isometric or oblique, shows three faces in one view. It is easier to recognise and less useful when you need a true length for making. Draw the kind of view the question names. A neat picture does not answer a question that asked for the front view and the plan. Put a title block on a formal sheet: the name of the object, your name, the scale and the date. Labels go on the part they name, not in a heap at the side.
The Career Technology tips guide says to draw the view the question names, and to label the parts. BECE Career Technology tips
Line type is a mark. An outline drawn as a thin line, or a hidden edge drawn solid, is wrong even when the shape is right. Name the instrument for the line: horizontal lines come from the tee square, not from guessing. If the question says "sketch", instruments are not required. If it says "draw to scale" or "project", they are. Orthographic and pictorial are different instructions. Answer the one that was written.
These are practice questions in the style of the paper, with a model answer and a mark scheme. They are not a promise of what your paper will ask.
3 marks
State the use of each line: a thick continuous line, a dashed line, a chain line. (3 marks)
A thick continuous line shows a visible outline. A dashed line shows a hidden edge. A chain line shows a centre.
2 marks
(a) What is a tee square used for? (1 mark)
(b) Name one other instrument you use with it to draw a vertical line. (1 mark)
(a) Drawing horizontal lines.
(b) A set square.
4 marks
Explain the difference between an orthographic drawing and a pictorial drawing. (4 marks)
An orthographic drawing shows separate flat views, such as the front and the plan. Each view is true to that direction. A pictorial drawing shows three faces in one view, so the object is easier to recognise, but the faces are not all true shape.
More questions on this topic are inside glearn, marked as you answer, with the reason written out. The first ones need no account.
Practise Career Technology freeA dashed line. A thick continuous line is a visible outline. A chain line is a centre. Using the solid outline for a hidden edge is a wrong line, even when the shape is right.
Orthographic projection uses separate flat views, such as the front, the plan and an end view. A pictorial drawing shows three faces at once. Draw the one the question asked for. All BECE Career Technology past questions