Process Control and Instrumentation Which of the following thermocouples is capable of measuring a temperature of -50°C? Iron-constantan Copper - constantan Chromel - alumel Platinum - platinum + rhodium Iron-constantan Copper - constantan Chromel - alumel Platinum - platinum + rhodium 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 Unstable response Undamped response Underdamped response Overdamped response Unstable response Undamped response Underdamped response Overdamped response ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation High temperature of around 2000°C of incandescent gas mantles is measured by a/an Specially designed thermocouple None of these Here Radiation pyrometer Optical pyrometer Specially designed thermocouple None of these Here Radiation pyrometer Optical pyrometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following thermocouples has the widest temperature measurement range? Copper-constantan Chromel-alumel Iron-constantan Platinum-platinum/rhodium Copper-constantan Chromel-alumel Iron-constantan Platinum-platinum/rhodium ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability? Nitrogen in steel thermometer Alcohol in glass thermometer Fused metal (Na or K) in steel thermometer Mercury in glass thermometer Nitrogen in steel thermometer Alcohol in glass thermometer Fused metal (Na or K) in steel thermometer Mercury in glass thermometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Suppose that the gain, time constant and dead time of a process with the following transfer function:Gc(s) = 10 exp( - 0.1s)/(0.5s + 1) are known with a possible error of ± 20% of their values. The largest permissible gain Kc of a proportional controller needs to be calculated below taking the values of process gain, time constant and dead time as 8, 0.6, 0.12 12, 0.6, 0.12 8, 0.6, 0.08 12, 0.4, 0.08 8, 0.6, 0.12 12, 0.6, 0.12 8, 0.6, 0.08 12, 0.4, 0.08 ANSWER DOWNLOAD EXAMIANS APP
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