This set of Construction and Building Materials Multiple Choice Questions & Answers (MCQs) focuses on “Curved Roofs”.
1. _______________ is a very light roof covering.
b) Patent tiles
d) Trafford asbestos cement tile
Explanation: Thatch is combustible, absorbs moisture rapidly and is easily liable to decay. It is unstable against high winds. A bed of matting is prepared to receive the hatch and in order to drain the roof easily, a Pitch of 45° is kept.
2. If tails are laid in two layers, the roof is known as ___________ roof.
a) Single tiled
b) Country tiled
c) Double tiled
Explanation: An overlap of at least 18 mm should be provided when country tiles are used. These tiles are liable to break easily and hence they require frequent replacement.
3. The wood _____________ are obtained from the well Seasoned timber with length varying from 300 mm to 380 mm.
a) Patent tiles
b) Eternit slates
Explanation: Shingles are laid in a similar fashion as tiles and slates and this roof covering is found to be useful especially in hilly areas where the wood is easily and cheaply available.
4. The Mangalore tile are one of _________ type of tiles.
a) Asbestos cement
Explanation: Mangalore tiles are red in colour and made of double channel mission Mangalore pattern. The special Mangalore tiles are available for ridge. It is found that about 14 Mangalore tiles are required for covering 1 square metre of roof area.
5. The ________________ sheets are prepared by pressing flat wrought iron plates between roller with groove and then they are galvanised with the coat of zinc.
a) Asbestos cement
b) Galvanized iron
Explanation: The process of galvanising is name after the 18th century Italian scientist Galvani and it has been prepared to highly sophisticated degree achieving improvement in the quality, economic, productivity and labour savings. The corrugation help to increase strength and rigidity and the permit easy flow of rainwater.
6. _____________ sheets are obtained from the cement which is mixed with about 15% of asbestos fibre.
a) Asbestos cement
b) Corrugated Galvanized iron
Explanation: Asbestos cement sheets are commonly known as the AC sheets, with a series of waves or corrugations are formed and they are used for factories, workshops, big halls, etc. The corrugation helps to increase strength and rigidity and the permit the easy flow of rainwater.
7. ______________ is a light, flexible and waterproof material.
c) AC sheets
Explanation: Ruberoid is not affected by Extreme heat or cold and it is not attacked by white ants. This material is available in two colours, red and grey. This material is available in rolls.
8. Roof which is nearly flat is known as the ________
a) Pitched roof
b) Flat roof
c) Undulating roof
d) Corrugated roof
Explanation: The Flat roof must slope in one direction or the other to cause rain water to flow of rapidly and easily. The construction of the flat roofs is same as that of floor except that the top surface is made slightly sloping in case of flat roofs.
9. A ____________ is a rounded vault forming a roof.
Explanation: The Dome is useful 1 rupees to be provided on a circular brickwork or regular polygon shape walls. The curved roof afford pleasing appearance in most of the cases, the construction of curves result in the economy of Steel and concrete.
10. A recent development known as the ___________ roof, has combine the advantages of flat roofs and curved roof.
a) Corrugated Inclined
b) Doubly curved tile
c) Asbestos cement tile
d) Galvanising iron tiles
Explanation: Here, the precast units of cement concrete tiles are prepared at the site. The size of tile is kept about 700 mm x 700 mm with a uniform thickness of at least 20 mm. The cement concrete of proportion 1:2:4 is adopted and the units are properly cured.
Sanfoundry Global Education & Learning Series – Construction and Building Materials.
To practice all areas of Construction and Building Materials, here is complete set of 1000+ Multiple Choice Questions and Answers.