Building materials and Construction. Sheet - 06
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1) Question.
Which one of the following is acid resistant asbestos:
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2) Question.
Pick up the correct statement from the following :
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3) Question.
Non acid-resistant asbestos is:
Answer.Chrysotile or white asbestos is the most commonly encountered form of asbestos, accounting for approximately 95% of the asbestos in the United States and a similar proportion in other countries. It is a soft, fibrous silicate mineral in the serpentine subgroup of phyllosilicates; as such, it is distinct from other asbestiform minerals in the amphibole group. Its idealized chemical formula is Mg3(Si2O5)(OH)4.The material has physical properties which make it desirable for inclusion in building materials, but poses serious health risks when dispersed into air and inhaled.
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4) Question.
Elastomers can extend upto
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5) Question.
The cement becomes unsound by the presence of excess
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6) Question.
For slaking of 10 kg of CaO, the theoretical amount of water
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7) Question.
The silica is used for perparing
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8) Question.
For sanitary pipes and chemical stonewares,
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9) Question.
The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively :
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10) Question.
The stones obtained by blasting are used as
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11) Question.
The skirting/dado in a bath room should be upto
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12) Question.
The maximum permissible deflection of a timber beam supporting a roof, is
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13) Question.
The sound which continues even after its source is cut off, is called
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14) Question.
The process of working a flat for the finishing coat, is known
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15) Question.
The type of pointing in which a V-shaped projection outside the wall surface, is provided, is called
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16) Question.
The type of pointing in which upper side of mortar joints is kept abhout 12 mm insude the face of the masonry and bottom is kept flushed with face of wall, is
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17) Question.
Dado is usually provided in
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18) Question.
The local swelling of a finished plaster, is termed
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19) Question.
The process of making the back ground rough, before plastering, is
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20) Question.
The process of filling hollow spaces of walls before plastering, is known
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