Johnstone High School

Technology Technology Department Department

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Isometric Introduction

Isometric Views with Circles and Curves

Isometric Views are one of the forms of 3D views that you need to know about in the Standard Grade Graphic Communication course.

This type of drawing shows the length, breadth, and height of the object being drawn.

An isometric is drawn with a corner closest to the viewer.

All vertical lines and all lines angled back at 30º can be measured accurately. No other lines on Isometric views can be measured.

Isometric Views with Circles and Curves

If you are sitting an SQA Credit paper in Graphic Communication, you will be required to know how to draw isometric views with curves.

This type of drawing is always included in the final paper each year.

The table on the following slide shows when each type of drawing was used and how many marks were allocated to it.

You will need to know how to draw full and part circles and also sloping edges and surfaces.

The ability to be able to answer questions about isometrics will be a great help in letting you reach the pass mark in the Credit exam paper.

If you are sitting the General paper you will need to know how to draw Isometric Views, although they will not normally include curves and circles, but will include sloping edges and surfaces.

Isometric Views – Credit Paper

YEAR Subject NUMBER OF FULL CIRCLES

NUMBER OF PART CIRCLES

TOTAL MARKS FOR QUESTION

% of DA mark available

1991 Electronic GameSalt Dish (sect)

00

40

1512

21%17%

1992 Disc Box (exploded)

0 0 18 26%

1993 CD Player 1 1 18 26%

1994 Staple Gun 0 2 14 20%

1995 Torch 1 0 15 21%

1996 Putting Aid 0 1 18 26%

1997 CD Player 1 1 18 26%

1998 Label Machine 1 0 16 23%

1999 Slide Projector 1 0 18 26%

2000 Speakers 1 1 16 23%

2001 Bathroom scales 1 1 16 23%

2002 Coffee maker 1 1 16 23%

Isometric Views - General

YEAR SUBJECT EXPLODEDTOTAL MARKS FOR QUESTION

% of DA mark available

1991 FireplacePrism - Box (sketch)

YesNo

128

17%11%

1992 Bracket No 10 14%

1993 Plant Pot Holder Yes 16 22%

1994

1995

1996 Torch Yes 15 21%

1997 Box Yes 12 17%

1998 Plant Pot Stand (exploded)

Yes 16 22%

1999

2000 Burglar Alarm No 8 11%

2001

2002

PowerPoint Presentation. 2003