VMI-cursus (Eng)

What have thermoplast
and rubber in common?
A
Both are vulcanized
B
Easy to recycle
C
Very elastic
D
Consist of macromolecules
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Slide 1: Quiz
MentorlesWOStudiejaar 1

This lesson contains 24 slides, with interactive quizzes.

Items in this lesson

What have thermoplast
and rubber in common?
A
Both are vulcanized
B
Easy to recycle
C
Very elastic
D
Consist of macromolecules

Slide 1 - Quiz

A co-polymer is made of:
A
Polymerization with copper linkages
B
Branched chains
C
Two different monomers
D
The same monomer

Slide 2 - Quiz

What happens during rubber vulcanization?
A
The chains start branching
B
An elastic network is formed
C
The rubber becomes plastic
D
After vulcanization the rubber becomes soluble

Slide 3 - Quiz

What is the influence of unsaturated C-C bonds in rubber?
A
To have a melting point
B
To vulcanize with Sulphur
C
It's a thermoplast
D
It is sensitive for ozone and UV irradiation

Slide 4 - Quiz

What is the difference in crosslinks between rubber and TPE?
A
Rubber has chemical crosslinks
B
TPE has chemical crosslinks
C
TPE has physical crosslinks
D
TPE consists of soft and hard segments

Slide 5 - Quiz

What are the most important functions of rubber? (1)
A
Connecting
B
Sealing
C
Damping
D
Separating

Slide 6 - Quiz

What are the most important functions of rubber? (2)
A
Isolation
B
Reinforcement
C
Transportation
D
Fire retardation

Slide 7 - Quiz

What is the largest contributor to filler reinforcement in rubber?
A
The color (black or light colored)
B
Particle size
C
Chemical composition
D
Density

Slide 8 - Quiz

What is the most used filler in the rubber industry? - use small caps -

Slide 9 - Open question

Which tires mostly consist of natural rubber?
A
Passenger vehicles
B
Lorry tire
C
Bicycle tire
D
Off-road tires

Slide 10 - Quiz

From which country originates the rubber tree?
A
Brazil
B
Malesia
C
Indonesia
D
Vietnam

Slide 11 - Quiz

Advantages of butadiene rubber are:
A
High strength
B
Good abrasion resistance
C
Low glass transition temperature
D
Low heat build up during use

Slide 12 - Quiz

Which rubber is most gas tight?
A
Butadiene rubber (BR)
B
Butyl rubber (IIR)
C
Natural rubber (NR)
D
Styrene-butadiene rubber (SBR)

Slide 13 - Quiz

How to influence die-swell? (1)
A
Adjust compound formulation
B
Extruder temperature
C
Length of vulcanization unit
D
Temperature of cooling water

Slide 14 - Quiz

Which type of extruder has the highest L/D ratio?
A
Hot feed extruder
B
Cold feed extruder

Slide 15 - Quiz

How to influence die-swell? (2)
A
Extrusion speed
B
Speed of belt at the exit of the extruder

Slide 16 - Quiz

What is vulcanization?
A
Heating of rubber
B
A chemical reaction in which a network is formed
C
Shaping of a rubber
D
Mixing of ingredients in a compound

Slide 17 - Quiz

Which tests can be performed on
un-vulcanized rubber compound? (1)
A
Viscosity
B
Compression set
C
Heat build-up
D
Green-strength

Slide 18 - Quiz

Which tests can be performed on
un-vulcanized rubber compound? (2)
A
Tack
B
DMTA

Slide 19 - Quiz

What is viscosity?
A
Return to original shape
B
Science of deformation and flow
C
Resistance to flow under tension

Slide 20 - Quiz

The viscosity of rubber can be measured using:
A
Tensile tester
B
Hardness tester
C
A Mooney test apparatus
D
A tack tester

Slide 21 - Quiz

What can be measured with a Garvey-die?
A
Vulcanization properties
B
The resistance against deformation
C
Extrusion properties
D
Sealing performance

Slide 22 - Quiz

What can be measured with a tensile tester? (1)
A
Abrasion resistance
B
Modulus
C
Hardness
D
Tear resistance

Slide 23 - Quiz

What can be measured with a tensile tester? (2)
A
Rebound elasticity
B
Maximum tensile stress
C
Rolling resistance
D
Stain at failure

Slide 24 - Quiz