Building Materials - Section 6 | Multiple Questions and Answers

41.	Pig iron made from heamatite ores free from sulphur, phosphorus and copper, is known as

	A.	Bessemer pig
	B.	Grey or foundry pig
	C.	White or forge pig
	D.	Mottled pig

42.	Pick up the correct statement from the following:

	A.	Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish
	B.	Cracked paints may be cured by removing paint and giving a fresh coat of paint
	C.	Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps
	D.	All the above.

43.	The material generally not used as extender in paints, is

	A.	powdered silica
	B.	gypsum
	C.	talc
	D.	zinc white.

44.	Pick up the non-inflammable plastic from the following:

	A.	Cellulose acetate plastics
	B.	Polyvinyl chloride plastics
	C.	Phenol formaldehyde plastic
	D.	Urea formaldehyde plastic.