Environmental Engineering in CE High noise levels produced during operation of fans and compressors can be reduced by using Accoustical absorbent Mufflers (silencers) Lagging of noisy duct None of these Accoustical absorbent Mufflers (silencers) Lagging of noisy duct None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Exposure to SO₂ containing chimney gases results in the Acceleration of corrosion rates of metals Increased drying & hardening time of paints Reduction in strength of leather & cloth All of these Acceleration of corrosion rates of metals Increased drying & hardening time of paints Reduction in strength of leather & cloth All of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels. 30 100 70 3 30 100 70 3 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE In water treatment plant, zeolite process is used to remove the __________ of water. Iron & zinc Hardness Alkalinity Acidity Iron & zinc Hardness Alkalinity Acidity ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Lagoons used for purification of polluted water Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds All of these Use micro-organisms/bacteria in presence of dissolved oxygen Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds All of these Use micro-organisms/bacteria in presence of dissolved oxygen Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Insufficient washing of sand grains in a rapid sand filter causes Shrinkage of filtering media Air binding Mud balls Expansion of filtering media Shrinkage of filtering media Air binding Mud balls Expansion of filtering media ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS