Building Construction

171. The loose pockets in soil mass can be bridged safely by providing a raft foundation provided the soft area is smaller than

1. The column spacing
2. One-third the column spacing
3. Half the column spacing
4. Three-fourth the column spacing

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172. The lower edge of the pitched roof, from where the rain water of the roof surface drops down, is known as

1. Hip
2. Gable
3. Ridge
4. Eaves

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173. The lower half portion between crown and skew back of the arch, is called

1. Spandril
2. Haunch
3. Springing
4. Soffit

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174. The maximum bearing capacity of soil is that of

1. Black cotton soil
2. Loose fine sandy soil
3. Dry coarse sandy soil
4. Hard rocks

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175. The maximum number of steps in a flight should generally be restricted to

1. 10
2. 12
3. 15
4. No limit

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176. The maximum permissible deflection of a timber beam supporting a roof, is

1. L/100
2. L/150
3. L/260
4. L/360

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177. The maximum permissible differential settlement, in case of foundations in clayey soil, is usually limited to

1. 10 mm
2. 20 mm
3. 30 mm
4. 40 mm

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178. The maximum total settlement for isolated foundations on clayey soils should be limited to

1. 25 mm
2. 40 mm
3. 65 mm
4. 100 mm

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179. The maximum total settlement for raft foundation on clayey soils should be limited to

1. 25 mm
2. 25 to 40 mm
3. 40 to 65 mm
4. 65 to 100 mm

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180. The member which is placed horizontally to support common rafter of a sloping roof, is

1. Purlin
2. Cleat
3. Batten
4. Strut

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