WorksheetsBuilding Materials Quiz 1 ECC2102
Total questions: 20
Worksheet time: 10mins
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]
Hygroscopicity is the property of:
Absorbing water under immersion
Absorbing water vapor from the air
Releasing heat when cooled
Resisting abrasion[1]
Water resistance in building materials is measured by:
Porosity coefficient
Softening coefficient (KR)
Thermal conductivity
Abrasion ratio[1]
A material with KR ≥ 0.85 is considered:
Poorly water-resistant
Water-resistant
Hydrophilic
Brittle[1]
Impermeability is defined as the ability to:
Absorb water quickly
Resist pressure from water or other liquids
Expand with heat
Resist abrasion[1]
Frost resistance is indicated by:
Water absorption ratio
Number of freeze-thaw cycles a material can withstand
Porosity percentage
Thermal conductivity[1]
Which property is NOT a thermal property of building materials?
Thermal conductivity
Thermal capacity
Thermal deformation
Brittleness[1]
Non-flammable materials are those that:
Burn easily when exposed to fire
Cannot be fired, carbonized, or slightly burned
Are hard to be burned but burn after removal from fire
Continue to burn after removal from fire[1]
The greatest stress a material can bear under external forces without destruction is called:
Toughness
Strength
Hardness
Porosity[1]
Elastic modulus (E) measures:
The ability to resist deformation
The ability to absorb water
The degree of porosity
The color stability[1]
Which property describes a material that fractures under stress with little deformation before rupture?
Toughness
Elasticity
Brittleness
Plasticity[1]
