Materials and Construction Which of the following is the most widely used insulating material for steam carray-ing pipelines? Slag wool Glass wool and 85% magnesia Vermiculite Ceramic fibre blanket Slag wool Glass wool and 85% magnesia Vermiculite Ceramic fibre blanket ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction __________ is a donor impurity for semi-conductors. Gallium None of these Antimony Boron Gallium None of these Antimony Boron ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction The purpose of nitriding the steel is to Harden its surface Soften its surface None of these Improve its reliability Harden its surface Soften its surface None of these Improve its reliability ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Copper is dissolved from its ore by H₂SO₄ in a percolation tank made of Stainless steel High silicon iron (14% Si) Wood Reinforced concrete lined with lead Stainless steel High silicon iron (14% Si) Wood Reinforced concrete lined with lead ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines? Chromium steel Silicon steel Molybdenum steel None of these Chromium steel Silicon steel Molybdenum steel None of these ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets. Chromium Nickel Cobalt Tungsten Chromium Nickel Cobalt Tungsten ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS