WorksheetsComposite Materials Quiz
Total questions: 20
Worksheet time: 10mins
Which of the following best defines a composite material?
A material made from two or more constituent materials with significantly different physical or chemical properties
A material made from a single element
A material that is always metallic
A material that cannot be processed
Which of the following is an example of a natural composite?
Wood
Steel
Glass
Aluminum
Why are composite materials often preferred over traditional materials?
They offer improved properties such as strength, durability, and lightweight characteristics
They are always cheaper
They are easier to recycle
They are made from a single material
Which of the following is an example of a synthetic organic fibre?
Glass
Aramid
Alumina
Boron
Wettability is important in the reinforcement-matrix interface of composite materials because:
It determines the colour of the composite.
It affects how well the matrix adheres to the reinforcement, influencing overall strength.
It increases the cost of production.
It is only relevant for natural fibres.
Which of the following is NOT a natural fiber?
Cotton
Silk
Wool
Nylon
Under which main category do 'Wool' and 'Silks' fall in the divisions of natural fibers?
Animal Fibers
Plant Fibers
Mineral Fibers
Hard Fibers
Which fiber do you think has the lowest tensile strength?
Coir
Sisal
Flax
Cotton
If a material requires both high tensile strength and high Young's Modulus, which fiber would be most suitable?
S-glass
Cotton
Jute
Soft Wood Kraft
Based on your knowledge, which fiber has the highest tensile strength value?
S-glass
E-glass
Aramid (normal)
Carbon (standard)
Which of the following is a natural fiber of interest mentioned in recent studies?
Bamboo
Polyester
Nylon
Acrylic
If you were to select a natural fiber for making biodegradable packaging, which of the following would be most suitable based on the list provided?
Rice husk (particles)
Polypropylene
Glass fiber
Carbon fiber
Which mechanical property of bamboo shows the greatest difference between measurements taken across the fibre and along the fibre?
Tensile Strength
Density
Elongation
Flexural Strength
After the EFB Shredder & EFB Press, what is the typical moisture content in EFB?
10 – 20%
30 – 40%
50 – 55%
70 – 80%
Which step in the EFB processing flow is responsible for further reducing the moisture content, and what is the typical heating time?
Hammer Mill (50HP), 10 mins
EFB Roller Crusher (30HP), 15 mins
4-Stage Dryer (20HP & 15HP) with dust remover system, 20 mins
EFB Shredder & EFB Press (75HP), 25 mins
Strategic Thinking: If the oil content in EFB after pressing is 0.2 – 0.3 to FFB, what could be the implication for further processing or utilization of EFB as a biomass resource?
High oil content may require additional extraction steps, increasing processing costs.
Low oil content means EFB is less suitable for energy production and should be discarded.
Low oil content makes EFB more suitable for use as a biomass fuel or raw material for other products.
High oil content improves the quality of fibre for textile production.
What is the purpose of the bailing machine in the fibre processing sequence?
To clean the fibre
To compress and package the fibre into bales
To dye the fibre
To transport the fibre to the market
If the oil content (wet basis) in EFB is measured at 5.0%, how does this compare to the typical range provided?
It is above the typical range of 3.5 – 4.0%.
It is within the typical range.
It is below the typical range.
It is exactly at the lower end of the range.
Why might industries prefer to use EFB fibre based on its listed advantages?
Because it is low cost, non-hazardous, and uses established extraction technology.
Because it is rare and difficult to extract.
Because it is highly hazardous and expensive.
Because it requires new, untested technology for extraction.
Which of the following is a disadvantage of EFB fibres?
Poor compatibility between hydrophobic polymer-matrix and hydrophilic fibres
High resistance to moisture
Unlimited processing temperature
High dimensional stability
