Materials and Construction Copper is dissolved from its ore by H₂SO₄ in a percolation tank made of High silicon iron (14% Si) Wood Stainless steel Reinforced concrete lined with lead High silicon iron (14% Si) Wood Stainless steel Reinforced concrete lined with lead ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si) Do not require heat treatment for any of its applications Are used for leaf and coiled springs Is tempered at 850°C Do not have good resilience properties Do not require heat treatment for any of its applications Are used for leaf and coiled springs Is tempered at 850°C Do not have good resilience properties ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Most of the common metals have __________ crystal structure. Hexagonal Cubic None of these Orthorhombic Hexagonal Cubic None of these Orthorhombic ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Cast iron is a __________ material. Brittle Ductile Tough Malleable Brittle Ductile Tough Malleable ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Dielectric strength of a material is Its capacity to withstand high voltage A magnetic property Its energy stroage capacity Its capacity to resist the flow of current Its capacity to withstand high voltage A magnetic property Its energy stroage capacity Its capacity to resist the flow of current ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. Having poor toughness Having poor fatigue resistance Not helpful in producing cleaner steel due to oxidising action of vanadium Used for making axle & shafts of aeroplanes, automobiles and locomotives Having poor toughness Having poor fatigue resistance Not helpful in producing cleaner steel due to oxidising action of vanadium Used for making axle & shafts of aeroplanes, automobiles and locomotives ANSWER DOWNLOAD EXAMIANS APP
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