Building Materials - Civil Engineering Questions and Answers

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The normal curing period for lime mortar, is:

1 day

3 days

7 days

10 days

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Glazing is used to make earthenware

hard

soft

porous

impervious

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Pug mill is used for

Preparation of clay

Moulding of clay

Drying of bricks

Burning of bricks

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A pug mill is used for

Softening brick earth

Moulding brick earth

Tempering brick earth

Providing brick earth

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The nominal size of the modular brick is

190 mm × 90 mm × 80 mm

190 mm × 190 mm × 90 mm

200 mm × 100 mm × 100 mm

200 mm × 200 mm × 100 mm

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Clay and silt content in a good brick earth must be at least

50 %

40 %

30 %

25 %

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The initial setting time for ordinary Portland cement as per IS specifications should not be less than

10 minutes

30 minutes

60 minutes

600 minutes

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According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than

7 MPa

11.5 MPa

16 MPa

21 MPa

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Crushing strength of a first class brick should not be less than

3.5 N/mm²

7.0 N/mm²

10.5 N/mm²

14.0 N/mm²