Building Materials Quiz 1 ECC2102

Which property refers to the dry mass per unit volume of a substance under absolute compact conditions?

• Apparent density

• Bulk density

• Density

• Porosity[1]

Apparent density is defined as:

• Dry mass per unit volume under absolute compact conditions

• Dry mass per unit volume under natural conditions

• Mass per unit volume including pores and voids

• Mass per unit volume under saturated conditions[1]

Bulk density is the mass per unit volume of a substance:

• In a fully compacted state

• In a natural state

• When packed as powder or granules

• When saturated with water[1]

Solidity is best described as:

• The ratio of pore volume to total volume

• The ratio of solid volume to total volume

• The ratio of water volume to total volume

• The ratio of air volume to total volume[1]

Porosity affects building materials primarily by:

• Increasing their strength

• Reducing their compactness

• Making them more fire-resistant

• Decreasing their color stability[1]

Fill rate in granular materials refers to:

• The percentage of voids in a bulk volume

• The degree to which granules pack the bulk volume

• The amount of water absorbed

• The mass per unit volume[1]

Which of the following materials is hydrophobic?

• Wood

• Brick

• Asphalt

• Concrete[1]

Water absorption in building materials is expressed as:

• Porosity ratio

• Water-absorption ratio

• Voidage percentage

• Solidity index[1]

Which material has the highest specific absorption of quality?

• Granite

• Ordinary concrete

• Clay brick

• Wood[1]

High water absorption in a material will NOT result in:

• Volume expansion

• Increased thermal conductivity

• Increased strength

• Decreased durability[1]