Process Control and Instrumentation Which of the following thermocouples can measure the maximum temperature? Chromel-alumel Tungsten-molybdenum Platinum-rhodium Iron-constantan Chromel-alumel Tungsten-molybdenum Platinum-rhodium Iron-constantan ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature Rusting of iron takes place Both B and C Here Emf produced is very low of the order of microvolt Embrittlement of iron occurs Rusting of iron takes place Both B and C Here Emf produced is very low of the order of microvolt Embrittlement of iron occurs ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Flow rate through an orifice is __________ the pressure differential. Proportional to the square root of Proportional to Inversely proportional to the square root of Inversely proportional to the square of Proportional to the square root of Proportional to Inversely proportional to the square root of Inversely proportional to the square of ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity? O₂ CO N₂ CO₂ O₂ CO N₂ CO₂ ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation In a closed loop system, the process to be controlled is an integrating process with transfer function l/2s. The controller proposed to be used in an integral controller with transfer function 1/T₁s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit Overdamped response Underdamped response Undamped response Unstable response Overdamped response Underdamped response Undamped response Unstable response ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Turbine flow meters are suitable for Very limited flow ranges Aerospace and in air borne applications Cryogenic flow measurements Both B and C Very limited flow ranges Aerospace and in air borne applications Cryogenic flow measurements Both B and C ANSWER DOWNLOAD EXAMIANS APP
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