Building Materials - Civil Engineering Questions and Answers

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Index number expressing the relative sizes of both coarse and fine aggregates, is called

proportioning of aggregates

fineness modulus

grading of aggregates

none of these.

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Dolomite is a lime stone which contains carbonate of magnesia upto

15%

20%

25%

35%

45%.

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Priming consists of

one part of white lead, 8 parts of chalk and four parts of twice boiled linseed oil

8 parts of white lead, one part of chalk and four parts of twice boiled linseed oil

one part of white lead, 8 parts of chalk and one part of linseed oil

none to these.

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The portion of the brick cut across its width and having its length equal to that of a full brick, is known as

closer

queen closer

king closer

prince closer

none of these.

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Seasoning of timber is done for

increasing moisture content

decreasing moisture content

increasing strength of timber

none to these.

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Bitumen felt is used for

water proofing

damp proofing

both (a) and (b)

neither (a) nor (b).

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According to ISI, bitumen is classified into

2 grades

4 grades

6 grades

8 grades.

10 grades.

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Lime putty

is made from hydraulic lime

is made by adding lime to water

can be used only upto three days

may be obtained from drying lime water mix passing through IS sieve No. 300

all of above.

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The minimum percentage of silica, alumina and ferric oxide in lime for white washing, is