Building Materials The basic purpose of a retarder in concrete is To improve the workability of concrete mix To render the concrete more water tight To increase the initial setting time of cement paste in concrete To decrease the initial setting time of cement paste in concrete To improve the workability of concrete mix To render the concrete more water tight To increase the initial setting time of cement paste in concrete To decrease the initial setting time of cement paste in concrete ANSWER DOWNLOAD EXAMIANS APP
Building Materials To give a brilliant finish, the type of varnish used, is Spirit varnish Oil varnish Water varnish Turpentine varnish Spirit varnish Oil varnish Water varnish Turpentine varnish ANSWER DOWNLOAD EXAMIANS APP
Building Materials Clay and silt content in a good brick earth must be at least 20 % 30 % 40 % 50 % 20 % 30 % 40 % 50 % ANSWER DOWNLOAD EXAMIANS APP
Building Materials Seasoning of timber is done To increase its temperature To paint its surface To remove water To make it water proof To increase its temperature To paint its surface To remove water To make it water proof ANSWER DOWNLOAD EXAMIANS APP
Building Materials The fire clay contains pure Oxide of iron Magnesium Hydrated aluminium silicate Lime Oxide of iron Magnesium Hydrated aluminium silicate Lime ANSWER DOWNLOAD EXAMIANS APP
Building Materials Crushing strength of a first class brick should not be less than 14.0 N/mm² 7.0 N/mm² 10.5 N/mm² 3.5 N/mm² 14.0 N/mm² 7.0 N/mm² 10.5 N/mm² 3.5 N/mm² ANSWER DOWNLOAD EXAMIANS APP
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