Building Materials - Civil Engineering Questions and Answers

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Pick up the correct statement from the following:

The average crushing strength of hand moulded bricks is 6000 t/m2

The average tensile strength of hand moulded brick is 200 t/m2

The average shearing strength of hand moulded brick is 600 t/m2

All the above

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Pick up the correct statement from the following:

The distinct plane of division along which a stone can easily be split, is called natural bed of stone

The natural bed of sedimentary rocks is along the planes of stratification

The natural bed of igneous rocks is not defined

All the above

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Pick up the correct statement from the following:

The free quartz suddenly expands at a temperature lower than 600°C

The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2

The sand stone with silicates resist a fire in a better way

All the above

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Pick up the correct statement from the following:

The heating of a material to redness in contact with air, is known as calcination

The property of lime by which it sets or hardens in damp places having no free circulation of air is called setting

The product that remains after calcination of limestone, is called lime

All the above

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Pick up the correct statement from the following:

The lime in excess makes the cement unsound and causes the cement to expand and disintegrate

The silica in excess makes the cement stronger but its setting time also increases

The excess amount of alumina weakens the cement

All the above

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Pick up the correct statement from the following:

The percentage of absorption for firebricks varies from 5 to 10

The percentage of silica in silica bricks is to the extent of about 95 to 97 percent

Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material

All the above

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Pick up the correct statement from the following:

The phenol is carbolic acid

The phenol is either extracted from coal-tar or prepared from benzene

Phenol reacts with formaldehyde, to form phenol formaldehyde resin

All the above

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Pick up the correct statement from the following:

The plastic bottles are made by the process of blowing

The application of thermo-setting resins on sheets of paper, is called laminating process

The plastic articles made by placing raw material in the desired moulds, is known as moulding process

All the above

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Pick up the correct statement from the following:

The plywoods do not split or crack due to changes in atmosphere

The commercial plywoods are available upto 150 cm wide and upto 300 cm long

The plywoods possess uniform tensile strength in all directions

All the above