a) Burning material
b) Insulating material
c) Destructive material
d) Building material
Solution: Properly insulated building cuts down the cost of electric burning in summer as well as in winter. Cavity walls are one of the types of thermal insulation which consists of two walls with cavity in between them.
2.__________ in a building means the free passage of clean air in a building.
a) Habitation
b) Protection
c) Sanitation
d) Ventilation
solution: Ventilation is essential in every building. Due to this, is control dust and other impurities entering in building.
3. The termite, which are responsible for the destruction of wooden materials, are popularly known as _______
a) Red ants
b) White ants
c) Black ants
d) Big ants
solution: More than 2300 species are living ,only 4% are living in colony . The termites live in a colony and they are very fast in eating wooden and other cellulosic materials as food.
4. The treatment given to the roof of a building to prevent the roof from the leakage of water is known as _________
a) Fire proofing
b) Damp proofing
c) Termite proofing
d) Sound proofing
solution: One of the basic requirements in case of all the buildings is that the structural should remain dry as far as possible. If this condition is not satisfied, it is likely that the building may become inhabitable and hence damp proofing or water proofing is required.