What could be the isometric view for the below orthographic projection? Please help! 2

[kar0]

 

[rb1957]

this is the student forum, and this is a pretty "simple" exercise in reading drawings.

From the front view the smaller rectangles could be the end wall, so there's a central wall (the front face looks like a Tee, and the back a rectangle, yes?

But the left view says "nope", there is a clear run from front to back, there isn't a wall at the back.

So what shape (surface?) would look like the left view and the front view, just looking at the edges ?

Spoiler: answer

an inclined plane

 

[kar0]

could you please draw the isometric view in this thread.

 

[IRstuff]

RB already gave you the answer; think how the answer might look depending on the orientation

 

[3DDave]

Draw the areas of the isometric you are certain of.

The front surface is an inverted (upside down) T.
The rear surface is a rectangle
The side has a shorter rectangle that goes from the T to the rear rectangle.

What edges are available to create the top surface? You know there is a short one at front and a wide one at the rear.
What new edges are found by creating that top surface?

It would cheat you to give the answer directly. The point of the exercise isn't to draw this shape. It is to accustom your brain to solving this sort of problem and it is important that you understand the process; the answer doesn't matter as much as the process.

 

[GregLocock]

I'll put it this way. Without any technical drawing classes at all I was given a series of questions like this for my apprenticeship. They said it was the best test for engineering aptitude they had found (I don't necessarily agree).

Anyway this little tag annoys me. is that extension to the vertical in the original drawing? And if so it is crucial to know whether this is first or third angle projection.

 

[kar0]

I'll put it this way. Without any technical drawing classes at all I was given a series of questions like this for my apprenticeship. They said it was the best test for engineering aptitude they had found (I don't necessarily agree).

Anyway this little tag annoys me. is that extension to the vertical in the original drawing? And if so it is crucial to know whether this is first or third angle projection.


View attachment 5882

no its not any extension, you can ignore

 

[Snickster]

Looks like three pieces of different materials. The center piece upside tee shape that goes all the way front face to back is of a certain material. The two rectangular pieces at left and right top are of different material than center part and could be same material but could be of different material than each other, that also extend from the front face to the back. The separation lines are not edges as they are more for just distinguishing the edges of the different materials. If this is true then they should be cross-hatched differently.

 

[dik]

??? (not isometric, but corrected).

 

[GregLocock]

Yes that certainly makes more sense. If I could point out the obvious LH and RH may not be symmetrical?

So OP, please post the actual problem, not your bad reinterpretation?

 

[3DDave]

It's a simple shape that doesn't need additional lines to make a solution.

 

[GregLocock]

RHS for non symmetrical solution, the question as posed by OP is unanswerable unambiguously

 

[IRstuff]

Try to figure out what the object looks like from the bottom or top sides.

 

[MintJulep]

the question as posed by OP is unanswerable unambiguously

I disagree.
The answer is "It's an impossible shape as drawn."

Ok, IRStuff showed that it's possible.

 

[dik]

Yes that certainly makes more sense.

or it could be a sloped surface on the RHS and LHS.

 

[GregLocock]

No , the LHS drawing in the OP has a horizontal line. Until we see the real question, not some hacked up version, we can't tell. I'm excluding the possibility of wafer thin surfaces or surface details.

 

[IRstuff]

Bottom view

 

[3DDave]

Can that get scaled down a bit?

 

[MintJulep]

With credit to IRstuff:

 

[GregLocock]

Nice, but it doesn't agree with OP's drawing. Look at front view.