Civil Engineering Drawing online quiz on “Roof Covering, Sloping Roof & Flat Terraced Roof”.
1. An ____________ is in a pure compression form.
a) arch
b) hinge
c) rigid
d) truss
Answer: a
Clarification: It can span a large area by resolving forces into compressive stresses and, in turn eliminating tensile stresses. This is sometimes referred to as arch action. As the forces in the arch are carried to the ground, the arch will push outward at the base, called thrust. As the rise, or height of the arch decreases, the outward thrust increases. In order to maintain arch action and prevent the arch from collapsing, the thrust needs to be restrained, either with internal ties or external bracing, such as abutments.
2. A wooden roof is a roofing system made from metal pieces or tiles characterized by its high resistance, impermeability and longevity.
a) True
b) False
Answer: b
Clarification: A metal roof is a roofing system made from metal pieces or tiles characterized by its high resistance, impermeability and longevity. Metal roofs can last up to 100 years, with installers providing 50 year warranties. Because of their longevity, most metal roofs are less expensive than asphalt shingles in the long term.
Metal roofing can consist of a high percentage of recycled material and is 100% recyclable. It does not get as hot as asphalt a common roofing material, and it reflects heat away from the building underneath in summertime.
3. The four-sided slopes are not the characteristic feature of only Mansard roofs; the _______________ also come with this feature.
a) amnsard roof
b) gambrel Roof
c) salt Box Roof
d) pyramid roof
Answer: a
Clarification: The four-sided slopes are not the characteristic feature of only Mansard roofs; the Pyramid roofs also come with this feature. As the name suggests, these roofs are shaped like pyramids, a roof with four sloping sides. These roofs are best-suited for smaller structures, like a farmhouse hut. These roofs are popular in the contemporary architecture, with many structures getting these roofs. The walls of these houses are symmetrical and easy to build. A lower degree pitch works best for such four-sided roofs. They would work even better if the walls were smaller and the roof made for a significant part of the house. It is not only aesthetically pleasing, but also more energy efficient.
4. _________ is one of the most efficient types of timber roof trusses.
a) Raised Heel Roof Truss
b) Quadrangular Roof Trusses
c) Parallel Chord Roof Truss
d) Scissor Roof Truss
Answer: a
Clarification: This is one of the most efficient types of timber roof trusses, mostly because it brings very good room for insulation, but at the same time it also provides you with a very good system for structural support. It might require some additional materials in order to make it bring the best results, not to mention that the costs can be a little higher when compared to other truss types, but it does help you lower the energy bill value, so keep that in mind.
5. ________ are found in traditional buildings in regions with a low precipitation.
a) Flat roof
b) Mono-pitched roof
c) Gable
d) Arched roof
