TECH-yearly Flashcards
What are 3 graphic data types
JPEG.jpg - joint photographic expert group
GIF.gif - graphics interchange format
Bitmap.bmp
What are 3 Text Data Types
Plain Text.txt - Useful for transferring from one word processer to another
Rich Text Format.rtf - Including formatting that can be more widely compatible and transferable
Word Document.doc - A Microsoft word processing document.
What’s a web data type
HTML.htm - hypertext markup language
The programming language on the www
What are 4 video data types
MPEG.mpg - moving picture experts group
AVI.avi - Audio Video Interleaved Animated File
.mov
.wmv - Windows Media video
What is a .wmv
An audio and video file encoded for use with Windows Media Player.
What is an AVI.avi
Audio video in
What is the earliest bridge in existence made of?
Stone
How long ago were timber bridges in existence?
Over 2000 years
What are the 6 structural systems in bridges
Flat beam Arch Truss Suspension Cantilever Cable-Stayed
Explain what flat beams are
The primitive use of a tree trunk to span a distance is an example of flat beam. Soon larger sections of solid timber could also be cut to form the base of a roadway to cross a bridge. Flat beams can not span great distances unless they are supported along their length, otherwise bending will occurr
What are arches used for
The arch was constructed initially from small blocks, called keystones, these blocks were often wedged in shape and also interlocked to add strength. The arch has great engineering value because when an arch is placed on the arch and to the supports. The blocks within the arch are also placed under compression. Stone and concrete are very strong when compressed.
What are trusses used for
Frames can be constructed to be very strong if they utilise the basic shape of a triangle. A triangular frame is very strong because if a load is a placed upon it, each member of the frame will share the load
What are suspensions used for
Materials that are strong when in tension can be used in the design on the suspension bridge. The roadway is suspended by cables that carry its weight. Large towers are needed to support the cables. The towers are usually made of stone, concrete or brick they will need to be strong when compressed
What are 2 natural fabrics
Cotton and linen
What are 2 synthetic fabrics
Nylon and polyester