# Engineering Drawings (1 Viewer)

#### mR sinister

##### Member
Hi,
i'm wondering if you guys can help me with the drawings in EST.
Basically everything you need to know, from sections, pictorials , orthogonal, oblique...
I am soo bad at them, as in people in my class can just look at the drawing and predict what it looks like, while i on the other hand have NO idea.

In my trials i managed to get 80% , and 10 marks where drawings which i got 0/10
So i really need to beef up in the drawing sections so i have a chance at a band 6

I dont mind if its just simple tips or thorough explanations, anything would help thanks in advance.

#### robm

##### Member

go to engineering class and practice your ass off haha

and look at the guy sitting next to you, he knows what he's doing

#### mR sinister

##### Member
Nah mate, there's this guy who sits next to mee,
names Robert Kiss, Does not have a clue what his doing. Lately hasn't even been let into the class since his always late.
You can really see his level of commitment towards the HSC

l

#### Omie Jay

##### gone
i did technical drawing in year 9 and 10, so this drawing stuff was super easy for me (though i havnt done it in the past 2 years)

erm... maybe go to a library and find a textbook on engineering drawings, making sure they use SI drawing methods (ie. 3rd angle projection).

now about the terms you mentioned...

regarding sections:

pictorials are just 3D drawings.

see Orthographic Drawings for info on orthogonal drawings (make sure you always draw orthogonals in 3rd angle projection, google it if you dont know what it is).

oblique is when you draw a 3D image with a horizontal axis, a 90degree vertical axis, and a 45 degree axis.
kinda hard to explain in words, so here's an image:

note that this is a cube. The side lengths of the front face are equal BUT when you draw its deapth along the 45 degree line, you must use HALF the given length.
this site has good beginners info on oblique drawings.

if you need any more help, PM me and i'll respond when i can.

Good luck

#### sam64mcd

##### New Member
Hey, don't worry, I'm left-handed and can barely write, let alone draw haha. Drawings always let me down in EST..

But I've been looking at past HSC papers and asking my teacher about it, and just continually practising drawing with a compass, using my set squares etc.. I think like everything, if you practise enough it becomes easier and more natural. My teacher gave me stacks of practise drawings and questions, maybe ask your teacher for more resources?

Sorry that I can't be of more help regarding sectioning and drawing.. but a technique for isometric (and oblique) is to draw up a 'box' where the part you're drawing will fit in, using the 30/60 degrees on the set squares, and from there I find it easier to picture the part withing that 'box' and I draw within it and just erase the lines afterwards and neaten it up.

#### mR sinister

##### Member
Thank you, to both the above posts.

yep practicing alot , however making slow progress, some questions from the past HSC papers are so confusing :s

#### Love school

##### New Member
hey i also do EST and drawing is very frustrating

would anyone know how to set out a orthogonal drawing

like where do the top side and front projections goo

lol lets hope that theres only 4 mark drawing this time *sigh*

#### Macdwg

I bet there will be 2 drawing questions. Each atleast 4 marks.

On sketch questions does anyone else actually freehand the drawing or do u rule it up proper n shiz?

#### 00iCon

##### Member
I bet there will be 2 drawing questions. Each atleast 4 marks.

On sketch questions does anyone else actually freehand the drawing or do u rule it up proper n shiz?
I've ruled it before, and run out of time, so i'm gonna rule the big straights and freehand the rest. I always leave them till last, and despite being normally very good at drawing i get maybe 7/10 average because i don't finish.

#### Kaos1

##### Member
Ok peeps... I've done Design and Technology in years 9 & 10, and Industrial Technology - Graphics in years 11 & 12... there are a few things you need to know...

- there are 5 general types of drawings

- orthognal (top, front, side)
- 1st angle ('looking through' the object)
- 3rd angle ('looking at' the object)

- isometric (30/60 degree angels)

- oblique (45 degree angle)
- cavalier (full length)
- cabinet (half length)

- perspective (vanishing point)
- single point (single at rear)
- dual point (two either side)
- triple point (either side and at bottom)

- axonometric (3D)
- isometric
- dimetric
- trimetric

Thats all of the drawings that are used in the design graphical subjects, and may (but not definately) be asked about in the engineering exam.

My suggestion: obtain and read 'Engineering Drawing' 3rd edition by A.W. Boundy.

It has everything you need to know, and more. If you need to know anything else, just ask me. I'm doing the Engineering exam next Wednesday aswell, and I'm ace at the drawing, but crap at everything else :-S

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#### mR sinister

##### Member
Ok peeps... I've done Design and Technology in years 9 & 10, and Industrial Technology - Graphics in years 11 & 12... there are a few things you need to know...

- there are 5 general types of drawings

- orthognal (top, front, side)
- 1st angle ('looking through' the object)
- 3rd angle ('looking at' the object)

- isometric (30/60 degree angels)

- oblique (45 degree angle)
- cavalier (full length)
- cabinet (half length)

- perspective (vanishing point)
- single point (single at rear)
- dual point (two either side)
- triple point (either side and at bottom)

- axonometric (3D)
- isometric
- dimetric
- trimetric

Thats all of the drawings that are used in the design graphical subjects, and may (but not definately) be asked about in the engineering exam.

My suggestion: obtain and read 'Engineering Drawing' 3rd edition by A.W. Boundy.

It has everything you need to know, and more. If you need to know anything else, just ask me. I'm doing the Engineering exam next Wednesday aswell, and I'm ace at the drawing, but crap at everything else :-S
umm in our course its only orthogonal, oblique, and isometric...
but i guess its half and full sections that let me down, i dont know why, but i cannot understand complex Drawings.

#### neaverules

##### New Member
Hold On...

As far as the drawings go, i am confused.
In class we have always used all the correct equipment eg: drawing board, T square, set squares, compasses, protractors- But if you look at those stupid "notes from the marking centre", about every drawing they say something like "candidates are awarded marks for using correct engineering representation, not for straight lines and perfect arks. Candidates should become more confident with freehand sketching". Does this mean they want us to just draw it without instruments, and concentrate mainly on correct (despite inaccurate) representation of features?
if so, it would certainly explain the relatively small amount of marks awarded for questions that take a long time if done very accurately.

Anyone been told anything like this from their teacher?

#### Kaos1

##### Member
that actually sounds extreemly accurate... however...

if the question asks: 'draw this object', then by definition, you should use instruments to achieve all the avaliable marks... but if the question asks 'sketch this object', then it means do a quick sketch as acurate as you can get it to the best of your freehand ability, using correct engineering representation... (subtle difference)

but basically, if you are able to draw a neat, freehand, relatively accurate drawing, showing correct engineering drawing principles and representation, then you'll get full marks

#### arman

##### Member
i don't get why they ask: 'sketch something using the scale shown'
if your using a scale, shouldn't you be ruling and stuff, not sketching?

#### Kaos1

##### Member
'... using the scale shown' simply means use the measurements they give you. do not measure it yourself, because you will get an inaccurate drawing