Building Materials - Section 1 | Multiple Questions and Answers

37.	Fibre glass

	A.	retains heat-longer
	B.	has a higher strength to weight ratio
	C.	is shock proof and fire retardent
	D.	does not decay

38.	Pick up the correct statement from the following:

	A.	The theory of formation of concrete is based on the phenomena of formation of voids
	B.	The bulking of sand is taken into account while volumetric proportioning of the aggregates
	C.	The dry sand and the sand completely flooded with water, have practically the same volume
	D.	The expansion and contraction joints are provided if concrete structures exceed 12 m in length

39.	Pick up the correct statement from the following:

	A.	In stone arches, the stones are placed with their natural beds radial
	B.	In cornices, the stones are placed with their natural beds as vertical
	C.	In stone walls, the stones are placed with their natural beds as horizontal
	D.	All the above.