Process Control and Instrumentation Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an Optical pyrometer Chromel-alumel thermocouple Either B or C Radiation pyrometer Optical pyrometer Chromel-alumel thermocouple Either B or C Radiation pyrometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by Increasing the diameter of the tube Filling nitrogen under pressure in the stem Accounting for the tube expansion Using steel tube in place of glass tube Increasing the diameter of the tube Filling nitrogen under pressure in the stem Accounting for the tube expansion Using steel tube in place of glass tube ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple. Platinum-platinum/rhodium None of these Chromel-alumel Iron-constantan Platinum-platinum/rhodium None of these Chromel-alumel Iron-constantan ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Dome temperature of blast furnace stove is most accurately measured by a Iron-constantan thermocouple Platinum resistance thermometer Radiation pyrometer Platinum-platinum/rhodium ther-mocuple Iron-constantan thermocouple Platinum resistance thermometer Radiation pyrometer Platinum-platinum/rhodium ther-mocuple ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following instruments is not used for measuring sub-zero (<0°) temperatures? Radiation pyrometer Mercury in glass thermometer Platinum resistance thermometer Vapor pressure thermometer Radiation pyrometer Mercury in glass thermometer Platinum resistance thermometer Vapor pressure thermometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant) nRT/P V/nRT p/nRT nRT/V nRT/P V/nRT p/nRT nRT/V ANSWER DOWNLOAD EXAMIANS APP
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