Building Materials The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively: 75, 10, 15 15, 75, 10 10, 75, 15 10, 15, 75 75, 10, 15 15, 75, 10 10, 75, 15 10, 15, 75 ANSWER DOWNLOAD EXAMIANS APP
Building Materials The basic purpose of a retarder in concrete is To increase the initial setting time of cement paste in concrete To render the concrete more water tight To decrease the initial setting time of cement paste in concrete To improve the workability of concrete mix To increase the initial setting time of cement paste in concrete To render the concrete more water tight To decrease the initial setting time of cement paste in concrete To improve the workability of concrete mix ANSWER DOWNLOAD EXAMIANS APP
Building Materials The specific gravity of marble, is 2.5 2.66 2.6 2.72 2.5 2.66 2.6 2.72 ANSWER DOWNLOAD EXAMIANS APP
Building Materials Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth? Silica and alkalies Alumina and iron Alkalies and magnesium Lime stone and alumina Silica and alkalies Alumina and iron Alkalies and magnesium Lime stone and alumina ANSWER DOWNLOAD EXAMIANS APP
Building Materials The practical limit of moisture content achieved in air drying of timber is 5 % 35 % 25 % 15 % 5 % 35 % 25 % 15 % ANSWER DOWNLOAD EXAMIANS APP
Building Materials The age of a tree can be known by examining Annular rings Heart wood Medullary rays Cambium layer Annular rings Heart wood Medullary rays Cambium layer ANSWER DOWNLOAD EXAMIANS APP
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