Why are plastics preferred over metals for many applications?
C
They conduct electricity
Analysis & Theory
Plastics are *lightweight*, making them easier to handle and reducing transportation costs compared to metals.
Which of the following is an advantage of plastics over wood?
A
Resistant to moisture and decay
B
Heavier and less flexible
Analysis & Theory
Plastics are *water-resistant and do not decay easily*, unlike wood which can rot or warp.
Plastics are preferred over glass because they are:
B
Shatterproof and flexible
Analysis & Theory
Plastics are *shatterproof and more flexible* than glass, making them safer for containers and packaging.
Which property of plastics reduces the need for maintenance compared to metals?
C
Electrical conductivity
Analysis & Theory
Plastics do not corrode like metals, reducing maintenance and increasing lifespan.
Plastics are advantageous over traditional materials because they can be:
A
Easily molded into complex shapes
C
Require high-temperature processing
Analysis & Theory
Plastics can be *easily molded and shaped* into a variety of forms, unlike metals or ceramics.
Which advantage makes plastics suitable for electrical insulation?
A
Non-conductive property
B
High thermal conductivity
Analysis & Theory
Plastics are *good electrical insulators*, unlike metals which conduct electricity.
Compared to traditional materials, plastics are often preferred because they are:
C
Economical and cost-effective
D
Require more maintenance
Analysis & Theory
Plastics are *economical* to manufacture, transport, and use, making them cost-effective alternatives.
Why are plastics preferred in packaging over traditional materials?
A
They are transparent, lightweight, and resistant to moisture
D
They react with food easily
Analysis & Theory
Plastics are *lightweight, moisture-resistant, and can be made transparent*, ideal for packaging applications.
Which advantage of plastics makes them ideal for household items?
A
Durable and long-lasting
Analysis & Theory
Plastics are *durable, resistant to wear, and long-lasting*, making them suitable for household items.
Which property allows plastics to replace metals in many applications?
A
Lightweight, corrosion-resistant, and versatile
C
Conductive and magnetic
D
Opaque and non-moldable
Analysis & Theory
Plastics are *lightweight, corrosion-resistant, and versatile*, which allows them to replace metals in many applications.