When a brick is immersed in water for 24 hours and then dried, if (A) No grey or white deposits appear on the surface, the brick is free from soluble salts (B) 10 percent surface is covered with grey or white deposits, the brick has slight efflorescence (C) 50 percent surface is covered with grey or white deposits, the brick has serious efflorescence (D) All the above

When a brick is immersed in water for 24 hours and then dried, if
(A) No grey or white deposits appear on the surface, the brick is free from soluble salts
(B) 10 percent surface is covered with grey or white deposits, the brick has slight efflorescence
(C) 50 percent surface is covered with grey or white deposits, the brick has serious efflorescence
(D) All the above
by

1 Answer

Answer :

Answer: Option D
by

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A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is (A) (bd²/12) + (B) (d²/12 ) + (C) b²/12 + (D) d²/12 +

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The percentage of alumina in a good brick earth lies between (A) 5 to 10 % (B) 20 to 30 % (C) 50 to 60 % (D) 70 to 80 %

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In order to find the specific heat capacity of an unknown material a 50 g piece is heated to 80 degrees Celsius and fully immersed in a well insulated calorimeter filled with 100 g of water at 10 degr?

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To ensure constant moisture content in aggregates (A) Area of each aggregate pile should be large (B) Height of each aggregate pile should not exceed 1.50 m (C) Aggregate pile should be left for 24 hours before aggregates are used (D) All the above

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11. Explain with the help of a diagram, why a pencil partly immersed in water appears to be bent at the water surface. [Delhi] -Chemistry-10

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A fixed beam with central point load undergoes a slight settlement at one end. Select suitable answer from the following: (a) Moment induced at both ends will be same (b) Moment induced at the end that has undergone settlement will be maximum (c) Moment induced will be maximum at the end having no settlement (d) Zero moment at the end that has settled.

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If eyes can't actually change color, how can someone's eyes appear green, blue, or even grey on any given day?

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The expected out turn of brick work in cement mortar in foundation and plinth per mason per day, is (A) 1.00 m3 (B) 1.25 m3 (C) 1.50 m3 (D) 1.75 m3

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Clay and silt content in a good brick earth must be at least (A) 50 % (B) 40 % (C) 30 % (D) 25 %

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