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31.

The silicious sandstone which has been subjected to metamorphic action, is called

A.	moorum	B.	laterite
C.	quartzite	D.	dolomite

32.

For railway ballast, the stone should be

A.	soft with a uniform texture	B.	hard, heavy, strong and durable
C.	hard, tough, resistant to abrasion and durable	D.	hard, dense, durable, tough and easily workable

33.

The quarrying of stone by the method of wedging is successfully carried out in

A.	sandstones	B.	limestones
C.	marbles	D.	all of these

34.

When quarrying is to be done in hard stone and compact rocks, the usual method of quarrying is

A.	by wedging	B.	by channelling machine
C.	by blasting	D.	all of these

35.

The compressive strength of felspar is

A.	equal to	B.	less than
C.	more than

36.

The most powerful explosive used in blasting is

A.	blasting power	B.	dynamite
C.	gun cotton	D.	cordite

37.

Gun cotton is made by saturating cotton with nitric acid.

Agree

Disagree

38.

The dressing of stone is done

A.	immediately after quarrying	B.	after seasoning
C.	after three months of quarrying	D.	just before building

39.

The crushing strength of a stone depends upon its

A.	texture	B.	specific gravity
C.	workability	D.	both (a) and (b)

40.

For the construction of retaining walls, a

A.	soft	B.	hard
C.	heavy