A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.
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Chemical Engineering · all questionsProcess Control And Instrumentation
Process Control And Instrumentation
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In a single tank system, the transfer function of __________ to inlet flow rate is
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Which of the systems having following transfer functions is stable?
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For an input forcing function, X(t) = 2t2, the Laplace transform of this function is
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Thermal conductivity measurement is used for the determination of
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Bode diagram are generated from output response of the system subjected to which of the following input?
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Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.
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Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function
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Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature
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A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if
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Temperature measuring instruments are standardised mostly with __________ points of pure substances.
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Flow rate through an orifice is __________ the pressure differential.
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Bode stability method uses __________ loop transfer function.
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Characteristic equation is the denominator of __________ loop transfer function.
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Routh stability method uses __________ loop transfer function.
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Temperature measurement by optical pyrometer is done above __________ point, which is 1063°C.
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Dead zone in an instrument must be less than __________ percent of the scale.
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A non-linear system will have __________ steady state values.
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The second order system with the transfer function has a damping ratio of
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Liquid argon level in a pressurised storage tank (at 3 kg/cm2) is measured by a/an
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