15. A good quality stone absorbs water less than
A.5%
B.10%
C.15%
D.20%

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16. A stone is rejected if it absorbs water more than
A.5%
B.10%
C.15%
D.20%

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17. Stones used for ornamental work must be
A. soft
B. hard
C. light
D. heavy.

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18. Stones used for rubble masonry must be
A. soft
B. hard
C. light
D. heavy.

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19. Stones used for the construction of retaining walls must be
A. soft
B. hard
C. light
D. heavy.

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20. In stone masonry, stones (stratified rocks) are so placed that the direction of pressure to the plane of bedding is
A. right angles
B.450
C.600
D. parallel

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21. In stone masonry, if stones are so placed that their layers are parallel to the direction of load, they
A. split easily
B. are affected by moisture
C. both (a) and (b)
D. none of these.'

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