Mechanics
Is wood generally stronger in compression or tension?
Compression! Tensile strength varies with type of wood and grain orientation, but generally, compression can withstand higher forces!
Force exerted per unit area is defined as ___
Pressure (Newton*meter)
What's the most common 3D printing material?
Polyactic Acid (PLA). This is the material we will be using for our project and it's biodegradable!
In 2021, the undergraduate MechSE department was ___% female.
a. 31%
b. 16%
c. 22%
c. 22%
In 2017 it was 20%, numbers are rising!
How many pounds can a typical 8-foot-tall 2' x 4' handle in the vertical direction
1,000 pounds
True or False: A pump creates pressure in a fluid.
Is a 3D printed object stronger parallel or perpendicular to the print bed face?
Parallel!
True or False: The Clarke Calculator is named after Edith Clarke.
True! She became America's first female Electrical Engineering professor and created the Clarke Calculator to graph electrical properties.
How much force can a 1/4-inch screw hold?
Up to 100 pounds in drywall (if installed properly)
What are the three types of energy utilized in hydraulics?
Kinetic (caused by moving liquids), heat (caused by resistance to flow), potential (caused by pressure)
How much force can PLA withstand?
a. 500 psi
b. 7250 psi
c. 12,550 psi
Bonus (200 points): Which 3D plastic can withstand the most force?
b. 7250 psi
Bonus: Polycarbonate (PC) has a tensile strength of 9,800 psi. In addition, it is very heat resistant and can lift 685 pounds.
Queen Elizabeth II is the only female member of the British Royal Family to __
a. serve in the armed forces
b. get a college degree
c. become valedictorian of her class
a. serve in the armed forces!
She joined the Women's Auxiliary Territorial Service and trained as a mechanic and drove a military truck!
What are the 3 best methods of joining wood?
Screws, dowels, glue. In this project we'll mainly be using screws!
True or False: Fluid accelerates from regions of low pressure to regions of high pressure.
False! Fluid flows from high pressure regions to low pressure regions.
How many places are there to 3D print on campus?
Bonus (100 Points): Name 4!
We found 6 on campus, but the number is growing!
Grainger Library, Architecture Building, Seibel Center of Design, MechE Building, Main Library, Armory, CUC Fab Lab (off campus)
Mary Jackson worked as a mathematician and aerospace engineer who had major contributions to the Supersonic Transport program. Her and other female engineers' achievements where displayed in the film ___.
a. Good Will Hunting
b. Hidden Figures
c. Mission Control
b. Hidden Figures
Jackson also worked for the inclusion of women and minorities in STEM fields.
What is the average pressure used in a real claw machine?
10 to 12 psi
In a flowing river, where is the maximum speed of a fluid?
Max speed occurs at the surface. Due to the 'no-slip' condition, speed is zero at the ground or where the fluid touches the pipe.
What is the main difference between thermosetting plastics and thermoplastics?
a. Thermosetting plastics remain in solid state after curing
b. Thermosetting is a reversible process
c. Thermosetting plastics can be recycled
a. Thermosetting plastics remain in solid state after curing
Thermosetting plastics decompose when reheated and can't be recycled as opposed to thermoplastics which can go through many melt and solidification processes. In most cases, we work with thermoplastics!
How many engineering colleges are named after women?
1!
RIT's Kate Gleason College of Engineering is the only current college of engineering named after a women. Yay Rochester!