Building Materials When a brick is immersed in water for 24 hours and then dried, if 50 percent surface is covered with grey or white deposits, the brick has serious efflorescence All listed here No grey or white deposits appear on the surface, the brick is free from soluble salts 10 percent surface is covered with grey or white deposits, the brick has slight efflorescence 50 percent surface is covered with grey or white deposits, the brick has serious efflorescence All listed here No grey or white deposits appear on the surface, the brick is free from soluble salts 10 percent surface is covered with grey or white deposits, the brick has slight efflorescence ANSWER DOWNLOAD EXAMIANS APP
Building Materials The most fire resistant paints are: Aluminium paints Cement paints Enamel paints Asbestos paints Aluminium paints Cement paints Enamel paints Asbestos paints ANSWER DOWNLOAD EXAMIANS APP
Building Materials Rapid hardening cement contains Tri-calcium silicate Tri-calcium aluminate Di-calcium silicate Tetra-calcium alumino-ferrite Tri-calcium silicate Tri-calcium aluminate Di-calcium silicate Tetra-calcium alumino-ferrite ANSWER DOWNLOAD EXAMIANS APP
Building Materials For sanitary pipes and chemical stonewares, Salt glazing is used Lead glazing is used Opaque glazing is used None of these Salt glazing is used Lead glazing is used Opaque glazing is used None of these ANSWER DOWNLOAD EXAMIANS APP
Building Materials During smelting process, the combination of fuel in the furnace All listed here Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2 Carbon dioxide with carbon forms carbon mono-oxide Forms carbon dioxide All listed here Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2 Carbon dioxide with carbon forms carbon mono-oxide Forms carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Building Materials The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively: 75, 10, 15 10, 15, 75 10, 75, 15 15, 75, 10 75, 10, 15 10, 15, 75 10, 75, 15 15, 75, 10 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS