Photo AI
The 3D graphic shows a USB memory key - Leaving Cert DCG - Question B-1 - 2016
Question B-1
The 3D graphic shows a USB memory key. Fig. B-1 below shows an incomplete isometric projection of a similar USB key. The plan and elevation of the USB key are also ... show full transcript
Worked Solution & Example Answer:The 3D graphic shows a USB memory key - Leaving Cert DCG - Question B-1 - 2016
Step 1
Draw the given equilateral triangle abe and the axonometric axes X, Y and Z.
Answer
To draw the equilateral triangle abe, first, set the point a as your starting point. Using a compass, measure a distance of 100 units to the left and mark point b. From point b, draw two lines to form equal angles of 60 degrees downwards towards point a and upwards to point c, ensuring all sides measure 100 units. Label the axonometric axes correctly: X, Y, and Z should be perpendicular to each other with X horizontal, Y angled to the left, and Z angled to the right.
Step 2
Draw the plan and elevation positioned as shown.
Answer
Begin with the elevation by projecting the height of the USB which is 75 units. From the apex of the triangle, draw vertical lines down to establish the height on the elevation view. For the plan, project the base of the triangle and ensure that the USB is represented correctly with the dimensions provided: Length of 100 units, width, and notable features like the semi-circular end placed according to the given measurements.
Step 3
Draw the axonometric projection of the rectangular parts of the USB key.
Answer
From the elevation, begin by projecting lines from the ends of the USB key down to create the rectangular prism shape. The front face should measure 100 units in length and 15.5 units in height. Make sure to draw the rear face, aligning it horizontally with the elevation, and ensure the lines are parallel to the corresponding axes. Include any details such as the tapering edges, which adds to the realism of the model.
Step 4
Complete the axonometric projection of the USB key by drawing the semi-circular end.
Answer
To complete the axonometric projection, start by drawing the semi-circle on the end view with a radius of 20 units. Ensure it is correctly placed and scaled according to the axonometric system. Divide the semi-circle into equal sections to illustrate gradation. Then draw the projection lines from the elevations, ensuring they reflect accurately onto the plan, thereby integrating the details of the semi-circular section effectively.