Building Construction

251) The compressive strength of first class and second class bricks should not be less than

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80 kg/cm²

252) When first class bricks are immersed in water for one hour, the weight of water absorbed by them should not exceed

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1/6 of weight of brick

253) Brick lintels are used when the span is

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less than 1 m

254) The points from which the curve of arch springs at the supports are called

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springing points

255) Lift becomes essential in a building when the number of floors exceeds

256) Queen-post trusses are used when the span is

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8 to 12 m

257) A combination of king-post truss and queen post truss is used when the span is

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>12 m

258) The fixture fixed on the external doors where pad locks are to be used is known as

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aldrop

259) The usual way of specifying the -crews used in wood work is by

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length

260) Joining two wooden boards at an oblique angle is termed

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mitring

Subject Notes

Objective Box

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