Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Science > Mechanical Engineering And Sum Other Shit > Flashcards

Mechanical Engineering And Sum Other Shit Flashcards

(60 cards)

Start Studying
1
Q

Name the 5 constraints.

A
  1. torsion
  2. compression
  3. tension
  4. deflection
  5. sheering
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is torsion?

A

The act of something being twisted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is compression?

A

A forced being pushed from both sides of the object “Crushing” it ——>

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is tension?

A

Being stretched

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is deflection force?

A

To resist an impact being forced upon it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is sheering?

A

The forcing of something tearing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Properties

What is ductility?

A

Ability to be drawn into a wire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Properties

What is malleability?

A

Ability to be shaped or flattened into a sheet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Properties

What is resilience?

A

Ability to resist impact

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Properties

What’s is rigidity/stiffness?

A

Inability to be bent or forced out of shape

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Properties

What is flexibility?

A

Will not keep its shape when subjected to a force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Properties

What is thermal conductivity?

A

Ability to allow heat to go through

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Properties

What is electrical conductivity?

A

Ability to allow an electrical current to flow through

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Properties

What is resistance to corrosion?

A

The ability to resist rusting

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Ceramics

Name common properties of ceramics

A

Low electrical conductivity: used as insulators in electronics

Hardness: used in building materials(bricks) and for certain cutting tools

Heat resistance

Low thermal conductivity: used in ducts for fumes and water

Resistance to corrosion: used in engines

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Ceramics

What causes ceramics to degrade?

A

Acids ( like sulphur) and bases ( like calcium hydroxide)

And variation in temperature degrade the properties of the material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Ceramics

What is used as a protection to protect ceramic from degradation?

A

There is no protection since practice are so durable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Plastics

What is a thermoplastic?

A

Plastics that can be heated and reshaped many times without losing its properties.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Plastics

What is thermosetting plastic?

A

Type of plastic that can only be heated and shaped once… otherwise if heated more than once it will lose its properties

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Plastics

Which type of plastic is recyclable?

A

Thermoplastic(because they need to be heated and reshaped to be reused)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Plastics

Name 3 causes of degradation of plastics

A
  1. penetration by liquid
  2. Oxidation
  3. Ultraviolet rays

These causes makes the plastic crack and change its colour

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Plastics

How can you protect plastics from degradation?

A
  1. Protection with a waterproof coating
  2. Adding antioxidants (fights against oxidation
  3. adding pigments that absorb UV rays
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Links

What’s the difference between direct and indirect link?

A

Direct: two parts held together without a linking component

Indirect: two parts that need a linking component to hold them together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Links

What’s the difference between rigid and flexible?

A

Rigid: unable to bend or be forced out of shape

Flexible: linking component can be deformed(rubber,spring)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Links What’s the difference between complete and partial?
Complete: the link prevents parts from moving independently from one another Partial: link allows one part to move independently from the other.
26
Links What’s the difference between removable and non removable?
Removable: parts can be separated without damaging them ( pen and cap) Non removable: removing the link component will damage its parts
27
Guiding controls Name three guiding controls
Translation Rotational Helical
28
Friction What is adhesion?
Two surfaces remain in contact with each other without slipping
29
Friction When friction is increased do you slip less or more?
Less
30
Friction Name 5 ways to reduce friction
``` Lubrication Low temperature Smooth surface Lower the weight=less friction Sanding ```
31
Friction Name 5 ways to increase friction
No lubrication High temperature Rougher surface=more friction Higher the weight=more friction
32
Gears What does it mean when a motion transmission or transformation system is réversible?
The driven can be the driver and it still functions
33
Gears Any gear with teeth needs what to lower friction?
Lubrication
34
Gears 1. The more teeth a gear has the_________ it will rotate 2. The less teeth a gear has the_________it will rotate
1. Slower | 2. Faster
35
Motion transmission system Name the 5 types of motion transmission systems.
1. Gear trains 2. Chain and sprocket 3. worm and worm gear 4. Friction gears 5. Belt and pulley system
36
Motion transmission system Which motion transmission system is irreversible?
Worm and worm gear system
37
Motion transmission system What are some elements you need to consider when building a gear train?(4)
Gear teeth must be identical Must have same shape Be equally spaced Contains at least 2 gears that mesh together Ex eggbeater,watch
38
Motion transmission system What is a chain a sprocket system?
Consists of at least 2 gears that do not mesh and are connected by a chain. This system is used to transmit motion between two or more distant parts
39
Motion transmission system When building a chain and sprocket system what are some elements to consider when building the system?(4)
- teeth on sprocket must be identical - the chain links must mesh with the sprocket teeth - system requires frequent lubrication - smaller the sprocket faster it turn
40
Motion transmission system What is a belt and pulley system?
Similar to chain and sprocket system however the gears have NO teeth and are referred to as pulleys, they are connected by a belt.
41
Motion transmission system What are elements needed to be considered when building a belt and pulley system?(3)
- pulleys must contain a groove where the belt can fit and the groove must be smooth - the belt must adhere (stick) to the groove and not slip. - the smaller the pulley the faster it turns
42
Motion transmission system What’s a worm and worm gear system?
Consists of worm(screw) whose rotational motion is transmitted to one or more worm gears
43
Motion transmission system What are some elements to consider when building a worm and worm gear system?(3)
- the groove of the worm must fit in the gear Teeth - the driver must be the worm(screw) - 1 rotation of the worm (screw)= gear moves 1 tooth a head
44
Motion transmission system What is a friction gear system?
Similar to gear trains except that friction gears do not have teeth. Motion is transmitted by friction between the gears.
45
Motion transmission system What are some elements to consider when building a friction gear system?(3)
- Type of rotational axes - the larger the diameter=slower rotation - made of material that will adhere( stick) to one another
46
Speed changes in a Motion transmission system Explain the speed change in a worm and worm gear.
For each full turn of the worm(screw), the worm gear move a distance equal to the width of one tooth on the worm gear. The greater the number of teeth on the worm gear=major decrease in speed
47
Speed change in motion transmission system When the driver is bigger/has more teeth than the driven gear. What is the speed change?
Increase
48
Speed change in motion transmission system When the driver gear is smaller/less teeth than the driven gear. What is the speed change?
Decrease
49
Speed change in motion transmission system When the driver and driven have the same diameter/number of teeth. What is the speed change?
No change
50
What is the speed ratio?
Driver ——- Driven
51
What is the difference between an mission transmission system and a motion transformation system?
Motion transmission: transfers same type of motion from one gear to another (rotational to rotational, translational to translational) Motion transformation: When a motion from one gear is transformed into a different motion when in contact with another gear (translational to Rotational)
52
Motion transformation system Name the 5 motion transformation systems.
1. Rack an pinion 2. Cam and follower 3. Screw gear system 1 4. Screw gear system 2 5. Slider Crank
53
Motion transformation system Which systems are irreversible?
- Screw gear system 1&2 | - Cam and follower
54
Motion transformation system What is a rack and pinion?
Contains at least one gear called a pinion and one straight bar called the rack
55
Motion transformation system What are 3 elements to consider when building a rack and pinion system?
- teeth on rack and pinion must be identical - system requires lubrication - the greater the number of teeth on the pinion= slower its rotation
56
Motion transformation system What’s the difference between screw gear system 1 & 2?
*Both contain a screw and nut* Screw gear system 1: - the screw is the driver - it’s rotational motion is transformed into translational motion of the nut Screw gear system 2: - nut is driver - it’s rotational motion is transformed into translational motion of the screw
57
Motion transformation system What is the motion transformation of a Cam and follower?
The rotational motion of the Cam makes the follower have a translating motion
58
Motion transformation system What are elements to be considered when building a Cam and follower system?(2)
- the follower must be guided in its translational motion | - a spring is needed to keep the follower in contact with the cam
59
Motion transformation system What motion transformation does the slider crank endure?
The translational motion of the piston, makes the crank rotate causing the wheels to turn
60
Motion transformation system What elements should be considered when building a slider crank mechanism?
- rod connects the piston to the crank - the Cylinder must guide the slider - need lubricantiom

Science (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions