Histogram

1.3.2 English and Metric Measurements

1.3.2 English and Metric Measurements

1. Why is the metric system used instead of the English system, and vice versa, in various parts of the world?

The Metric system is easier to manipulate because all conversions are based on multiples of ten. The English system is easier to use when there are no measuring tools around because the English system is based on the common lengths of body parts. For example, the yard is based on the average length of a human arm.

2. When you look at a drawing, how do you know if you are looking at inch or millimeter values? Why is it important for an engineer to know this piece of information?

You look at the unit to see if the measurements say inches or mm. It is very important for engineers to know this because mixing up units can result is vastly difference measurements and designs.

3. Why would you have to know how to convert measurements when looking at working drawing?

You have to know the conversion formula between the unit on the drawing and the unit you want to convert it to.

Mutiview Drawings

1. The mutiview sketches can show alot more information and provide the designer oh how to make each side of the object
2. The horizontal or vertical lines line up with those on the adjacent drawings
3. Because the construction lines may cause confusing when describing the object, also there are many
4. The third mutiview sketch draws itself. The center lines separate the different views of a mutiview drawing

Perspective Drawings

1. A Vanishing point is a point where all the “parallel” lines in the drawing headed in that direction seem to converge into the horizon. .

2. The one-point perspective is used when one entire side of an object is facing you; the two point perspective is used when only an edge is facing you. The three point is used when only one corner is facing you and the sides extend into three distinct directions.

Oblique Drawing

1. The computer can get all the angles exactly right and draw much straighter lines

2. Push down with more weight when drawing object lines, while lightly draw the construction lines.

3. Oblique drawings have the front facing directly towards the viewer while isometric is slightly slanted. Also, obliques have a 90 degree angle between the sides, while isometrics draws have about a 120 digress angle

Road Block Drawing

In

In this project, we had around forty minutes of class time to design and build a skyscraper from only a single piece of poster paper. Also, we couldnt use any adhesives and the skyscaper must be able to hold a helicopter pad (a small coin).

The thing I liked about his activity was that it gave us the chance to use the engineering process, first come up with the design and then build. One thing I disliked about this activity is that we only had one class period to build and design the skycraper, which is not nearly enough time to design and brainstorm ideas.

One thing I would do differntly is make the base more stable by putting more weight at the bottom of the tower

We came up with our final design by just trying to make the highest tower, then finding out that it will topple and finally cutting the tower in half so that it wouldnt fall over

One of our biggest design flaws waas that we didnt have a good "lock system" that kepted the two sides of paper poster together