Process Control and Instrumentation A mercury thermometer can not be used to measure the temperature below the freezing point of mercury, which is __________ °C. -80.9 -38.9 -60.9 -11.9 -80.9 -38.9 -60.9 -11.9 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is π/3 π/12 π/6 5π/12 π/3 π/12 π/6 5π/12 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following is a desirable characteristic of an instrument? High measuring lag High fidelity Poor reproducibility High drift High measuring lag High fidelity Poor reproducibility High drift ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following does not figure in the list of seven substances selected for international temperature scale? Oxygen and sulphur (B.P) Zinc (B.P) and mercury (F.P) Ice (F.P) and steam (B.P) Antimony and silver (F.P) Oxygen and sulphur (B.P) Zinc (B.P) and mercury (F.P) Ice (F.P) and steam (B.P) Antimony and silver (F.P) ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Composition of natural gas is determined by the Both B and C Haldane apparatus Mass spectrometer Chromatograph Both B and C Haldane apparatus Mass spectrometer Chromatograph ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Time constant is the Time required by the measured variable to reach 63.2% of its ultimate change Time taken by the controlled variable to reach 63.2% of its full change Same as transportation lag Same as dead time Time required by the measured variable to reach 63.2% of its ultimate change Time taken by the controlled variable to reach 63.2% of its full change Same as transportation lag Same as dead time ANSWER DOWNLOAD EXAMIANS APP
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