Week 4

Which property of a diamond makes it suitable to be used for cutting purposes?

• High Toughness

• High Strength

• High Hardness

• Low melting point

State true or false: Thermoplastic polymers are linear carbon chains that are cross-linked and can be melted and reshaped upon heating.

• True

• False

What properties of the clay are required to prepare good clay-burned bricks?

• Organic matter

• Unmalleability

• Vitrification ability

• Tensile strength

What is the engineering purpose of creating a frog in a brick?

• To make it aesthetically good

• To provide a good bond with mortar

• To reduce the material used for manufacturing

• To increase the load-carrying capacity

Which one of the following is incorrect related to bricks?

• The durability is highly dependent on its water absorption capacity

• Water absorption should be less than 20% up to a class of 12.5.

• Efflorescence should be 'slight' up to a class of 12.5

• Water absorption should be less than 15% for higher-class

State true or false: An increase in the strength of the laterite stone over time is known as induration.

• True

• False

Choose the correct option(s) regarding lime

• The formation of hydrated lime is called slaking

• Slaking is an endothermic reaction

• Carbonation of lime leads to hardening

• The lime mortar has high thermal conductivity

Which of the following options are correct related to mortar

• Mortar is used for bonding masonry units together

• The mortar used in masonry should have higher strength than masonry units

• A thick mortar layer produces a stronger wall compared to a thin mortar layer

• Mortar provides a level surface for masonry units

Select the appropriate option below regarding types of bonds in brick masonry

• Flemish bond is the strongest bond

• English bond is the strongest bond

• 10 cm thick wall can be made with a header bond

• 20 cm thick wall can be made with a stretcher bond

The choice of stone for construction depends upon:

• Weight of the rock

• Dimensions of rock

• Mineralogy and weather resistance

• Mechanical properties of rock