Flapper nozzle is used in a/an ______________ controller?
A. Electronic
B. Hydraulic
C. Pneumatic
D. None of these
Process Control and Instrumentation
Which of the following judges the accuracy of an instrument ?
Which of the following judges the accuracy of an instrument ?
A. Dead zone
B. Drift
C. Static error
D. None of these
______________ controller has the maximum stabilising time?
______________ controller has the maximum stabilising time?
A. P
B. PD
C. PI
D. PID
Compositional analysis of ______________ is done using mass spectrometer?
Compositional analysis of ______________ is done using mass spectrometer?
A. An isotope
B. Natural gas
C. A solid
D. An alloy
Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference ?
Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference ?
A. Peltier effect
B. Thomson effect
C. Seebeck effect
D. None of these
Liquid discharge from a tank or reservoir cannot be measured by __________________?
Liquid discharge from a tank or reservoir cannot be measured by __________________?
A. Orificemeter
B. Weirs
C. Mouthpieces
D. Notches
Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the ________________?
Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the ________________?
A. Mercury in glass thermometer
B. Optical pyrometer
C. Iron-constantan thermocouple
D. Alcohol filled thermometer
Which of the following is a desirable characteristic of an instrument ?
Which of the following is a desirable characteristic of an instrument ?
A. High drift
B. High fidelity
C. High measuring lag
D. Poor reproducibility
Working principle of radiation pyrometer is based on the ________________?
Working principle of radiation pyrometer is based on the ________________?
A. Wien’s law
B. Kirchoff’s law
C. Stefan-Boltzmann law
D. Seebeck effect
The response of two tanks of same size and resistance in series is __________________?
The response of two tanks of same size and resistance in series is __________________?
A. Under damped
B. Critically damped
C. Over damped
D. None of the above