Process Control and Instrumentation Questions

• In an exothermic chemical reactor, the manipulated variable is the flow rate of
• The offset introduced by proportional controller with gain Kcin response of first order system can be reduced by
• Helium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C.
• The inverse Laplace transform of the function is
• Dilatometer is used to measure
• The transfer function of a first order system is
• Optical activity of a solution can be determined using a
• Water is entering a storage tank at a temperature T0 and flow rate Q0 and leaving at a flow rate Q and temperature T. There are negligible heat losses in the tank. The area of cross-section of the tank is A0. The model that describes the dynamic variation of temperature of water in the tank with time is given as :
• __________ stability method uses open loop transfer function.
• 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?
• The transfer function of a second order system is
• Emf generated in a thermocouple depends on the temperature
• A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is
• A system with a double pole at the origin is unstable since the corresponding term in the time domain
• A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in
• pH meter has
• Radiation thermometer can not measure the temperature
• Thermal wells are used in the temperature measurement to
• Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere?
• To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with