PAT Help

[CrazyStairs]

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I would like some help on two PAT questions. How do I upload the pictures here?

 

[CrazyStairs]

Below are the links to the two PAT problems that I need some help on:

http://i1121.photobucket.com/albums/l502/CrazyStairs11/IMG_0003.jpg

http://i1121.photobucket.com/albums/l502/CrazyStairs11/IMG_0004.jpg

Question 21: I think the answer is D, but the answer key says C. Why is that long vertical line at the back dashed instead of solid?

Question 23: I think the answer is C, but the answer key says B. Why is that horizontal line in the middle of the figure dashed instead of solid?

Thanks in advance for the help.

 

[dmdluffy]

Below are the links to the two PAT problems that I need some help on:

http://i1121.photobucket.com/albums/l502/CrazyStairs11/IMG_0003.jpg

http://i1121.photobucket.com/albums/l502/CrazyStairs11/IMG_0004.jpg

Question 21: I think the answer is D, but the answer key says C. Why is that long vertical line at the back dashed instead of solid?

Question 23: I think the answer is C, but the answer key says B. Why is that horizontal line in the middle of the figure dashed instead of solid?

Thanks in advance for the help.

Q21: The dashed line represents the step that is behind the protrusion with the cylinder cut out.

 

[dmdluffy]

Below are the links to the two PAT problems that I need some help on:

http://i1121.photobucket.com/albums/l502/CrazyStairs11/IMG_0003.jpg

http://i1121.photobucket.com/albums/l502/CrazyStairs11/IMG_0004.jpg

Question 21: I think the answer is D, but the answer key says C. Why is that long vertical line at the back dashed instead of solid?

Question 23: I think the answer is C, but the answer key says B. Why is that horizontal line in the middle of the figure dashed instead of solid?

Thanks in advance for the help.

Having a hard time looking at Q23 because the resolution is so low. However, comparing answers B and your answer C, it looks mainly to be a difference of proportion. It seems you grasped all the correct lines but there is probably some subtle proportion issue (i.e. one bit is longer or wider, etc.). Hope this helps! If you post a higher res. picture, I can try to help some more.

 

[CrazyStairs]

Having a hard time looking at Q23 because the resolution is so low. However, comparing answers B and your answer C, it looks mainly to be a difference of proportion. It seems you grasped all the correct lines but there is probably some subtle proportion issue (i.e. one bit is longer or wider, etc.). Hope this helps! If you post a higher res. picture, I can try to help some more.

The difference between B and C is that horizontal line in the middle of the figure. In B, its dashed. In C, its solid. Sorry, I don't have a better camera.

 

[dmdluffy]

The difference between B and C is that horizontal line in the middle of the figure. In B, its dashed. In C, its solid. Sorry, I don't have a better camera.

It's dashed because you're looking at it from the right end of the figure. You're always looking at it from that end. So from that end, the apex of the triangle has to be a dashed line when looking at it from the right. Also, from the right end, the step in the "L" figure has to be dashed because you're looking at it from the right. Hope that makes sense, let me know. I can try and clarify more.

 

[CrazyStairs]

It's dashed because you're looking at it from the right end of the figure. You're always looking at it from that end. So from that end, the apex of the triangle has to be a dashed line when looking at it from the right. Also, from the right end, the step in the "L" figure has to be dashed because you're looking at it from the right. Hope that makes sense, let me know. I can try and clarify more.

From the right end, we would see a horizontal line between the "L" figure on top and the triangle on the bottom (sort of like how the front view shows a horizontal line separating the top "L" figure and the bottom triangle), right? Thus, a solid horizontal line.

 

[dmdluffy]

From the right end, we would see a horizontal line between the "L" figure on top and the triangle on the bottom (sort of like how the front view shows a horizontal line separating the top "L" figure and the bottom triangle), right? Thus, a solid horizontal line.

Ohhh I get what you're thinking. So keep in mind that a solid line indicates that the face has some kind of feature to it. On the front view, it's a horizontal line because a step forms between the triangle base and L shaped top. However, no such step forms on the end view. That's to say, it's "flush" against each other. The dashed line comes in parts of the L form a step with the triangle base on the other (left) end view. Hope that makes sense. Just remember that you can only have a solid line if there is some kind of feature on that face. Even if you stack two objects together (i.e. a cube and a rectangular cube on each other with one so that it forms an L) you might "see" a a line where the two structures meet on the flush face, but as far as the PAT is concerned, there is no line because there is no step.

 

[CrazyStairs]

Ohhh I get what you're thinking. So keep in mind that a solid line indicates that the face has some kind of feature to it. On the front view, it's a horizontal line because a step forms between the triangle base and L shaped top. However, no such step forms on the end view. That's to say, it's "flush" against each other. The dashed line comes in parts of the L form a step with the triangle base on the other (left) end view. Hope that makes sense. Just remember that you can only have a solid line if there is some kind of feature on that face. Even if you stack two objects together (i.e. a cube and a rectangular cube on each other with one so that it forms an L) you might "see" a a line where the two structures meet on the flush face, but as far as the PAT is concerned, there is no line because there is no step.

Ok, I got it. Thanks for clearing that up.

 

[dmdluffy]

Ok, I got it. Thanks for clearing that up.

Awesome, glad I could help. GL with the DAT