Process Control and Instrumentation Questions

• Routh test
• Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic?
• Number of poles in a system with transfer function is
• The Laplace transform of a sinusoidal function (eg; sin at) is represented by the curve
• Mass spectrometer is used for the composition analysis of
• A typical example of a physical system with under damped characteristic is a
• Which of the following is not a differential pressure flow meter?
• A bolometer is
• Bode diagram are generated from output response of the system subjected to which of the following input?
• The transfer function of a process is . If a step change is introduced into the system, then the response will be
• Stability of a control system containing a transportation lag can be best analysed by
• When a bare thermocouple is covered by a protective sheath, the response becomes
• Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by
• Temperature measurement by optical pyrometer is done above __________ point, which is 1063°C.
• Stabilising time for the controllers is the time required for the response to reach __________ percent of its ultimate value.
• Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.
• The open loop transfer function of a process is . In the root locus diagram, the poles will be at
• Composition of alloys can be determined by
• A constant volume gas thermometer employing __________ is used to measure sub-zero (i.e., < 0° C) temperature.
• A mercury thermometer can not be used to measure the temperature below the freezing point of mercury, which is __________ °C.