Exam 17: Engineering Materials

Composites may be classified into

Concrete is stronger in tension than it is in compression.

Alcohol has a lower vapor pressure value than water.

Most of the ultraviolet radiation arriving on earth from the sun is absorbed by

Fiber optics is the branch of science that deals with transmitting data, voice, and images through thin plastic or glass fibers.

Which type of glass has the higher coefficient of thermal expansion?

The earth's atmosphere, which we refer to as air, is a mixture of approximately a. $78 \%$ oxygen, $21 \%$ nitrogen, and less than $1 \%$ carbon dioxide. b. $78 \%$ nitrogen, $21 \%$ oxygen, and less than $1 \%$ argon. c. $78 \%$ oxygen, $21 \%$ carbon dioxide, and less than $1 \%$ helium. d. $78 \%$ oxygen, $21 \%$ water vapor, and less than $1 \%$ ozone.

Concrete is stronger in tension than it is in compression.

Metallic oxides are added to give glass various colors.

In general, the higher the density of wood the lower the strength.

Silicon is a nonmetallic chemical element that is used in the manufacture of transistors and electronic computer chips.

Silicone is a synthetic compound that is commonly used in lubricants, varnishes, and waterproofing products.

Composite materials consist of two main ingredients: matrix material and fibers.

In general the properties of materials may be divided into three groups.

Steel is an alloy of iron with approximately a. $2 \%$ or less carbon b. $20 \%$ or less carbon c. $35 \%$ or less carbon d. $50 \%$ or less carbon

Steel is approximately

The strength to weight ratio is defined as

Air and water are among the most abundant fluids on earth.

Which type of glass is better in high-temperature applications?

Timber is commonly classified as