Building Construction

141. The depth of an arch is the distance between

1. Ground level and springing line
2. Crown and springing line
3. Crown and ground level
4. Intrados and extrados

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142. The depth of concrete bed of the foundation depends upon

1. The projection of the concrete block beyond the footing over it
2. The upward soil pressure
3. The mix of the concrete
4. All the above

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143. The depth of excavation of foundations, is generally measured with a

1. Ranging rod
2. Steel tape
3. Levelling staff
4. Boning rod

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144. The depth of the ground water table may be ascertained by

1. Looking through the well in the vicinity
2. Standing on the well in the vicinity
3. Measuring the depth of water in the well
4. None of the above

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145. The differential settlement in case of foundations on sandy soils should not exceed

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

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146. The dimensions of a half queen closer, are

1. 9 cm × 9 cm × 9 cm
2. 9 cm × 9 cm × 4.5 cm
3. 9 cm × 4.5 cm × 9 cm
4. 1.8 cm × 4.5 cm × 9 cm

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147. The disease of dry rot in timber is caused by

1. Lack of ventilation
2. Alternate wet and dry conditions
3. Complete submergence in water
4. None of the above

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148. The entrained concrete is used in lining walls and roofs for making

1. Heat insulated
2. Sound insulated
3. Neither (a) nor (b)
4. Both (a) and (b)

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149. The exterior angle between outer faces of a wall, is known as

1. Turn
2. Junction
3. Quion
4. All the above

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150. The floor is rubbed with oxalic acid, for making its surface

1. Free from voids
2. Glossy
3. Durable
4. Uniform

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